Intent.java分析
代码位于frameworks/base/core/java/anroid/Content/Intent.java
Intent是对要进行操作的一种抽象描述。用action抽象操作，用data(android.net.Uri)抽象操作参数。
除此之外，category用来描述action所属的类别（添加action对应的component的额外属性）来指导系相应的component如何被匹配与被处理，type用来指定data的MIME类型；component指定用来执行action的组件，如果指定了这个，其他参数被忽略；extra用来给component相应方法附加额外的所需参数。
先打成package android.content，并import这些类
17package android.content; 19import android.annotation.AnyRes;
20import android.annotation.IntDef;
21import android.annotation.SdkConstant;
22import android.annotation.SdkConstant.SdkConstantType;
23import android.annotation.SystemApi;
24import android.content.pm.ActivityInfo;
25import android.content.pm.ApplicationInfo;
26import android.content.pm.ComponentInfo;
27import android.content.pm.PackageManager;
28import android.content.pm.ResolveInfo;
29import android.content.res.Resources;
30import android.content.res.TypedArray;
31import android.graphics.Rect;
32import android.net.Uri;
33import android.os.Build;
34import android.os.Bundle;
35import android.os.IBinder;
36import android.os.Parcel;
37import android.os.Parcelable;
38import android.os.Process;
39import android.os.ResultReceiver;
40import android.os.ShellCommand;
41import android.os.StrictMode;
42import android.os.UserHandle;
43import android.provider.DocumentsContract;
44import android.provider.DocumentsProvider;
45import android.provider.MediaStore;
46import android.provider.OpenableColumns;
47import android.util.ArraySet;
48import android.util.AttributeSet;
49import android.util.Log;
50import com.android.internal.util.XmlUtils;
51import org.xmlpull.v1.XmlPullParser;
52import org.xmlpull.v1.XmlPullParserException;
53import org.xmlpull.v1.XmlSerializer; 55import java.io.IOException;
56import java.io.PrintWriter;
57import java.io.Serializable;
58import java.lang.annotation.Retention;
59import java.lang.annotation.RetentionPolicy;
60import java.net.URISyntaxException;
61import java.util.ArrayList;
62import java.util.HashSet;
63import java.util.List;
64import java.util.Locale;
65import java.util.Objects;
66import java.util.Set; 68import static android.content.ContentProvider.maybeAddUserId;
这个类实现了Parcelable和Cloneable接口
619public class Intent implements Parcelable, Cloneable {
定义了的attr字符串有action，category，type，component，data，flags
private static final String ATTR_ACTION = "action";
private static final String ATTR_CATEGORY = "category";
private static final String ATTR_TYPE = "type";
private static final String ATTR_COMPONENT = "component";
private static final String ATTR_DATA = "data";
private static final String ATTR_FLAGS = "flags";
tag字符串有categories，extra
private static final String TAG_CATEGORIES = "categories";
private static final String TAG_EXTRA = "extra";
下面是字符串常量
ACTION_MAIN启动一个activity为main入口
// ---------------------------------------------------------------------
// ---------------------------------------------------------------------
// Standard intent activity actions (see action variable). /**
634 * Activity Action: Start as a main entry point, does not expect to
635 * receive data.
636 * <p>Input: nothing
637 * <p>Output: nothing
638 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_MAIN = "android.intent.action.MAIN";
ACTION_VIEW启动activity用来显示数据
/**
643 * Activity Action: Display the data to the user. This is the most common
644 * action performed on data -- it is the generic action you can use on
645 * a piece of data to get the most reasonable thing to occur. For example,
646 * when used on a contacts entry it will view the entry; when used on a
647 * mailto: URI it will bring up a compose window filled with the information
648 * supplied by the URI; when used with a tel: URI it will invoke the
649 * dialer.
650 * <p>Input: {@link #getData} is URI from which to retrieve data.
651 * <p>Output: nothing.
652 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_VIEW = "android.intent.action.VIEW";
ACTION_DEFAULT和ACTION_VIEW一样
/**
657 * A synonym for {@link #ACTION_VIEW}, the "standard" action that is
658 * performed on a piece of data.
659 */
public static final String ACTION_DEFAULT = ACTION_VIEW;
ACTION_QUICK_VIEW用来快速浏览数据
/**
663 * Activity Action: Quick view the data. Launches a quick viewer for
664 * a URI or a list of URIs.
665 * <p>Activities handling this intent action should handle the vast majority of
666 * MIME types rather than only specific ones.
667 * <p>Input: {@link #getData} is a mandatory content URI of the item to
668 * preview. {@link #getClipData} contains an optional list of content URIs
669 * if there is more than one item to preview. {@link #EXTRA_INDEX} is an
670 * optional index of the URI in the clip data to show first.
671 * <p>Output: nothing.
672 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_QUICK_VIEW = "android.intent.action.QUICK_VIEW";
ACTION_ATTACH_DATA用来附加数据到某个component上
/**
677 * Used to indicate that some piece of data should be attached to some other
678 * place. For example, image data could be attached to a contact. It is up
679 * to the recipient to decide where the data should be attached; the intent
680 * does not specify the ultimate destination.
681 * <p>Input: {@link #getData} is URI of data to be attached.
682 * <p>Output: nothing.
683 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_ATTACH_DATA = "android.intent.action.ATTACH_DATA";
ACTION_EDIT用来编辑数据
/**
688 * Activity Action: Provide explicit editable access to the given data.
689 * <p>Input: {@link #getData} is URI of data to be edited.
690 * <p>Output: nothing.
691 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_EDIT = "android.intent.action.EDIT";
ACTION_INSERT_OR_EDIT用来插入或者编辑数据
/**
696 * Activity Action: Pick an existing item, or insert a new item, and then edit it.
697 * <p>Input: {@link #getType} is the desired MIME type of the item to create or edit.
698 * The extras can contain type specific data to pass through to the editing/creating
699 * activity.
700 * <p>Output: The URI of the item that was picked. This must be a content:
701 * URI so that any receiver can access it.
702 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_INSERT_OR_EDIT = "android.intent.action.INSERT_OR_EDIT";
ACTION_PICK用来从一个目录里选数据
/**
707 * Activity Action: Pick an item from the data, returning what was selected.
708 * <p>Input: {@link #getData} is URI containing a directory of data
709 * (vnd.android.cursor.dir/*) from which to pick an item.
710 * <p>Output: The URI of the item that was picked.
711 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_PICK = "android.intent.action.PICK";
ACTION_CREATE_SHORTCUT创建快捷方式
/**
716 * Activity Action: Creates a shortcut.
717 * <p>Input: Nothing.</p>
718 * <p>Output: An Intent representing the shortcut. The intent must contain three
719 * extras: SHORTCUT_INTENT (value: Intent), SHORTCUT_NAME (value: String),
720 * and SHORTCUT_ICON (value: Bitmap) or SHORTCUT_ICON_RESOURCE
721 * (value: ShortcutIconResource).</p>
722 *
723 * @see #EXTRA_SHORTCUT_INTENT
724 * @see #EXTRA_SHORTCUT_NAME
725 * @see #EXTRA_SHORTCUT_ICON
726 * @see #EXTRA_SHORTCUT_ICON_RESOURCE
727 * @see android.content.Intent.ShortcutIconResource
728 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_CREATE_SHORTCUT = "android.intent.action.CREATE_SHORTCUT";
下面的为ACTION_CREATE_SHORTCUT相关的shortcut extra配置，用来配置shortcut Intent的名字，shortcut的名字资源，图标资源
/**
733 * The name of the extra used to define the Intent of a shortcut.
734 *
735 * @see #ACTION_CREATE_SHORTCUT
736 */
public static final String EXTRA_SHORTCUT_INTENT = "android.intent.extra.shortcut.INTENT";
/**
739 * The name of the extra used to define the name of a shortcut.
740 *
741 * @see #ACTION_CREATE_SHORTCUT
742 */
public static final String EXTRA_SHORTCUT_NAME = "android.intent.extra.shortcut.NAME";
/**
745 * The name of the extra used to define the icon, as a Bitmap, of a shortcut.
746 *
747 * @see #ACTION_CREATE_SHORTCUT
748 */
public static final String EXTRA_SHORTCUT_ICON = "android.intent.extra.shortcut.ICON";
/**
751 * The name of the extra used to define the icon, as a ShortcutIconResource, of a shortcut.
752 *
753 * @see #ACTION_CREATE_SHORTCUT
754 * @see android.content.Intent.ShortcutIconResource
755 */
public static final String EXTRA_SHORTCUT_ICON_RESOURCE =
"android.intent.extra.shortcut.ICON_RESOURCE";
ACTION_APPLICATION_PREFERENCES调整app的preference
/**
760 * An activity that provides a user interface for adjusting application preferences.
761 * Optional but recommended settings for all applications which have settings.
762 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_APPLICATION_PREFERENCES
= "android.intent.action.APPLICATION_PREFERENCES";
ACTION_SHOW_APP_INFO显示app info
/**
768 * Activity Action: Launch an activity showing the app information.
769 * For applications which install other applications (such as app stores), it is recommended
770 * to handle this action for providing the app information to the user.
771 *
772 * <p>Input: {@link #EXTRA_PACKAGE_NAME} specifies the package whose information needs
773 * to be displayed.
774 * <p>Output: Nothing.
775 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_SHOW_APP_INFO
= "android.intent.action.SHOW_APP_INFO";
内部类ShortcutIconResource封装了shortcut图标相关的package名字和icon resource id。实现了Parcelabel接口，可以通过Parcel来创建。也可以通过Context来创建
/**
781 * Represents a shortcut/live folder icon resource.
782 *
783 * @see Intent#ACTION_CREATE_SHORTCUT
784 * @see Intent#EXTRA_SHORTCUT_ICON_RESOURCE
785 * @see android.provider.LiveFolders#ACTION_CREATE_LIVE_FOLDER
786 * @see android.provider.LiveFolders#EXTRA_LIVE_FOLDER_ICON
787 */
public static class ShortcutIconResource implements Parcelable {
/**
790 * The package name of the application containing the icon.
791 */
public String packageName; /**
795 * The resource name of the icon, including package, name and type.
796 */
public String resourceName; /**
800 * Creates a new ShortcutIconResource for the specified context and resource
801 * identifier.
802 *
803 * @param context The context of the application.
804 * @param resourceId The resource identifier for the icon.
805 * @return A new ShortcutIconResource with the specified's context package name
806 * and icon resource identifier.``
807 */
public static ShortcutIconResource fromContext(Context context, @AnyRes int resourceId) {
ShortcutIconResource icon = new ShortcutIconResource();
icon.packageName = context.getPackageName();
icon.resourceName = context.getResources().getResourceName(resourceId);
return icon;
} /**
816 * Used to read a ShortcutIconResource from a Parcel.
817 */
public static final Parcelable.Creator<ShortcutIconResource> CREATOR =
new Parcelable.Creator<ShortcutIconResource>() { public ShortcutIconResource createFromParcel(Parcel source) {
ShortcutIconResource icon = new ShortcutIconResource();
icon.packageName = source.readString();
icon.resourceName = source.readString();
return icon;
} public ShortcutIconResource[] newArray(int size) {
return new ShortcutIconResource[size];
}
}; /**
834 * No special parcel contents.
835 */
public int describeContents() {
return ;
} public void writeToParcel(Parcel dest, int flags) {
dest.writeString(packageName);
dest.writeString(resourceName);
} @Override
public String toString() {
return resourceName;
}
}
ACTION_CHOOSER用来选择合适的Activity来做动作，并且可以自己配置标题
/**
852 * Activity Action: Display an activity chooser, allowing the user to pick
853 * what they want to before proceeding. This can be used as an alternative
854 * to the standard activity picker that is displayed by the system when
855 * you try to start an activity with multiple possible matches, with these
856 * differences in behavior:
857 * <ul>
858 * <li>You can specify the title that will appear in the activity chooser.
859 * <li>The user does not have the option to make one of the matching
860 * activities a preferred activity, and all possible activities will
861 * always be shown even if one of them is currently marked as the
862 * preferred activity.
863 * </ul>
864 * <p>
865 * This action should be used when the user will naturally expect to
866 * select an activity in order to proceed. An example if when not to use
867 * it is when the user clicks on a "mailto:" link. They would naturally
868 * expect to go directly to their mail app, so startActivity() should be
869 * called directly: it will
870 * either launch the current preferred app, or put up a dialog allowing the
871 * user to pick an app to use and optionally marking that as preferred.
872 * <p>
873 * In contrast, if the user is selecting a menu item to send a picture
874 * they are viewing to someone else, there are many different things they
875 * may want to do at this point: send it through e-mail, upload it to a
876 * web service, etc. In this case the CHOOSER action should be used, to
877 * always present to the user a list of the things they can do, with a
878 * nice title given by the caller such as "Send this photo with:".
879 * <p>
880 * If you need to grant URI permissions through a chooser, you must specify
881 * the permissions to be granted on the ACTION_CHOOSER Intent
882 * <em>in addition</em> to the EXTRA_INTENT inside. This means using
883 * {@link #setClipData} to specify the URIs to be granted as well as
884 * {@link #FLAG_GRANT_READ_URI_PERMISSION} and/or
885 * {@link #FLAG_GRANT_WRITE_URI_PERMISSION} as appropriate.
886 * <p>
887 * As a convenience, an Intent of this form can be created with the
888 * {@link #createChooser} function.
889 * <p>
890 * Input: No data should be specified. get*Extra must have
891 * a {@link #EXTRA_INTENT} field containing the Intent being executed,
892 * and can optionally have a {@link #EXTRA_TITLE} field containing the
893 * title text to display in the chooser.
894 * <p>
895 * Output: Depends on the protocol of {@link #EXTRA_INTENT}.
896 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_CHOOSER = "android.intent.action.CHOOSER";
createChooser是创建ACTION_CHOOSE Intent的快捷函数
/**
901 * Convenience function for creating a {@link #ACTION_CHOOSER} Intent.
902 *
903 * <p>Builds a new {@link #ACTION_CHOOSER} Intent that wraps the given
904 * target intent, also optionally supplying a title. If the target
905 * intent has specified {@link #FLAG_GRANT_READ_URI_PERMISSION} or
906 * {@link #FLAG_GRANT_WRITE_URI_PERMISSION}, then these flags will also be
907 * set in the returned chooser intent, with its ClipData set appropriately:
908 * either a direct reflection of {@link #getClipData()} if that is non-null,
909 * or a new ClipData built from {@link #getData()}.
910 *
911 * @param target The Intent that the user will be selecting an activity
912 * to perform.
913 * @param title Optional title that will be displayed in the chooser.
914 * @return Return a new Intent object that you can hand to
915 * {@link Context#startActivity(Intent) Context.startActivity()} and
916 * related methods.
917 */
public static Intent createChooser(Intent target, CharSequence title) {
return createChooser(target, title, null);
}
createChooser还可以带个IntentSender回调参数，用来记住用户的选择
可以看到new个新的Intent包含旧的Intent的内容，并且如果要是有相应flag并且ClipData和getData有不为Null的，就创建ClipData
/**
923 * Convenience function for creating a {@link #ACTION_CHOOSER} Intent.
924 *
925 * <p>Builds a new {@link #ACTION_CHOOSER} Intent that wraps the given
926 * target intent, also optionally supplying a title. If the target
927 * intent has specified {@link #FLAG_GRANT_READ_URI_PERMISSION} or
928 * {@link #FLAG_GRANT_WRITE_URI_PERMISSION}, then these flags will also be
929 * set in the returned chooser intent, with its ClipData set appropriately:
930 * either a direct reflection of {@link #getClipData()} if that is non-null,
931 * or a new ClipData built from {@link #getData()}.</p>
932 *
933 * <p>The caller may optionally supply an {@link IntentSender} to receive a callback
934 * when the user makes a choice. This can be useful if the calling application wants
935 * to remember the last chosen target and surface it as a more prominent or one-touch
936 * affordance elsewhere in the UI for next time.</p>
937 *
938 * @param target The Intent that the user will be selecting an activity
939 * to perform.
940 * @param title Optional title that will be displayed in the chooser.
941 * @param sender Optional IntentSender to be called when a choice is made.
942 * @return Return a new Intent object that you can hand to
943 * {@link Context#startActivity(Intent) Context.startActivity()} and
944 * related methods.
945 */
public static Intent createChooser(Intent target, CharSequence title, IntentSender sender) {
Intent intent = new Intent(ACTION_CHOOSER);
intent.putExtra(EXTRA_INTENT, target);
if (title != null) {
intent.putExtra(EXTRA_TITLE, title);
} if (sender != null) {
intent.putExtra(EXTRA_CHOSEN_COMPONENT_INTENT_SENDER, sender);
} // Migrate any clip data and flags from target.
int permFlags = target.getFlags() & (FLAG_GRANT_READ_URI_PERMISSION
| FLAG_GRANT_WRITE_URI_PERMISSION | FLAG_GRANT_PERSISTABLE_URI_PERMISSION
| FLAG_GRANT_PREFIX_URI_PERMISSION);
if (permFlags != ) {
ClipData targetClipData = target.getClipData();
if (targetClipData == null && target.getData() != null) {
ClipData.Item item = new ClipData.Item(target.getData());
String[] mimeTypes;
if (target.getType() != null) {
mimeTypes = new String[] { target.getType() };
} else {
mimeTypes = new String[] { };
}
targetClipData = new ClipData(null, mimeTypes, item);
}
if (targetClipData != null) {
intent.setClipData(targetClipData);
intent.addFlags(permFlags);
}
} return intent;
}
ACTION_GET_CONTENT获取相应的数据的内容，提供的不是具体的URI，而是数据类型。
/**
983 * Activity Action: Allow the user to select a particular kind of data and
984 * return it. This is different than {@link #ACTION_PICK} in that here we
985 * just say what kind of data is desired, not a URI of existing data from
986 * which the user can pick. An ACTION_GET_CONTENT could allow the user to
987 * create the data as it runs (for example taking a picture or recording a
988 * sound), let them browse over the web and download the desired data,
989 * etc.
990 * <p>
991 * There are two main ways to use this action: if you want a specific kind
992 * of data, such as a person contact, you set the MIME type to the kind of
993 * data you want and launch it with {@link Context#startActivity(Intent)}.
994 * The system will then launch the best application to select that kind
995 * of data for you.
996 * <p>
997 * You may also be interested in any of a set of types of content the user
998 * can pick. For example, an e-mail application that wants to allow the
999 * user to add an attachment to an e-mail message can use this action to
1000 * bring up a list of all of the types of content the user can attach.
1001 * <p>
1002 * In this case, you should wrap the GET_CONTENT intent with a chooser
1003 * (through {@link #createChooser}), which will give the proper interface
1004 * for the user to pick how to send your data and allow you to specify
1005 * a prompt indicating what they are doing. You will usually specify a
1006 * broad MIME type (such as image/* or {@literal *}/*), resulting in a
1007 * broad range of content types the user can select from.
1008 * <p>
1009 * When using such a broad GET_CONTENT action, it is often desirable to
1010 * only pick from data that can be represented as a stream. This is
1011 * accomplished by requiring the {@link #CATEGORY_OPENABLE} in the Intent.
1012 * <p>
1013 * Callers can optionally specify {@link #EXTRA_LOCAL_ONLY} to request that
1014 * the launched content chooser only returns results representing data that
1015 * is locally available on the device. For example, if this extra is set
1016 * to true then an image picker should not show any pictures that are available
1017 * from a remote server but not already on the local device (thus requiring
1018 * they be downloaded when opened).
1019 * <p>
1020 * If the caller can handle multiple returned items (the user performing
1021 * multiple selection), then it can specify {@link #EXTRA_ALLOW_MULTIPLE}
1022 * to indicate this.
1023 * <p>
1024 * Input: {@link #getType} is the desired MIME type to retrieve. Note
1025 * that no URI is supplied in the intent, as there are no constraints on
1026 * where the returned data originally comes from. You may also include the
1027 * {@link #CATEGORY_OPENABLE} if you can only accept data that can be
1028 * opened as a stream. You may use {@link #EXTRA_LOCAL_ONLY} to limit content
1029 * selection to local data. You may use {@link #EXTRA_ALLOW_MULTIPLE} to
1030 * allow the user to select multiple items.
1031 * <p>
1032 * Output: The URI of the item that was picked. This must be a content:
1033 * URI so that any receiver can access it.
1034 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_GET_CONTENT = "android.intent.action.GET_CONTENT";
ACTION_DIAL出现一个拨号界面
/**
1038 * Activity Action: Dial a number as specified by the data. This shows a
1039 * UI with the number being dialed, allowing the user to explicitly
1040 * initiate the call.
1041 * <p>Input: If nothing, an empty dialer is started; else {@link #getData}
1042 * is URI of a phone number to be dialed or a tel: URI of an explicit phone
1043 * number.
1044 * <p>Output: nothing.
1045 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_DIAL = "android.intent.action.DIAL";
ACTION_CALL直接拨打电话
/**
1049 * Activity Action: Perform a call to someone specified by the data.
1050 * <p>Input: If nothing, an empty dialer is started; else {@link #getData}
1051 * is URI of a phone number to be dialed or a tel: URI of an explicit phone
1052 * number.
1053 * <p>Output: nothing.
1054 *
1055 * <p>Note: there will be restrictions on which applications can initiate a
1056 * call; most applications should use the {@link #ACTION_DIAL}.
1057 * <p>Note: this Intent <strong>cannot</strong> be used to call emergency
1058 * numbers. Applications can <strong>dial</strong> emergency numbers using
1059 * {@link #ACTION_DIAL}, however.
1060 *
1061 * <p>Note: if you app targets {@link android.os.Build.VERSION_CODES#M M}
1062 * and above and declares as using the {@link android.Manifest.permission#CALL_PHONE}
1063 * permission which is not granted, then attempting to use this action will
1064 * result in a {@link java.lang.SecurityException}.
1065 */
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_CALL = "android.intent.action.CALL";
ACTION_CALL_EMERGENCY直接拨打紧急电话
1068 /**
1069 * Activity Action: Perform a call to an emergency number specified by the
1070 * data.
1071 * <p>Input: {@link #getData} is URI of a phone number to be dialed or a
1072 * tel: URI of an explicit phone number.
1073 * <p>Output: nothing.
1074 * @hide
1075 */
1076 public static final String ACTION_CALL_EMERGENCY = "android.intent.action.CALL_EMERGENCY";
1077 /**
ACTION_CALL_PRIVILEGED拨打任意类型的电话
1077 /**
1078 * Activity action: Perform a call to any number (emergency or not)
1079 * specified by the data.
1080 * <p>Input: {@link #getData} is URI of a phone number to be dialed or a
1081 * tel: URI of an explicit phone number.
1082 * <p>Output: nothing.
1083 * @hide
1084 */
1085 public static final String ACTION_CALL_PRIVILEGED = "android.intent.action.CALL_PRIVILEGED";
ACTION_SIM_ACTIVATION_REQUEST请求激活sim卡
1086 /**
1087 * Activity action: Activate the current SIM card. If SIM cards do not require activation,
1088 * sending this intent is a no-op.
1089 * <p>Input: No data should be specified. get*Extra may have an optional
1090 * {@link #EXTRA_SIM_ACTIVATION_RESPONSE} field containing a PendingIntent through which to
1091 * send the activation result.
1092 * <p>Output: nothing.
1093 * @hide
1094 */
1095 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1096 public static final String ACTION_SIM_ACTIVATION_REQUEST =
1097 "android.intent.action.SIM_ACTIVATION_REQUEST";
ACTION_SENDTO发送信息给其他人
1098 /**
1099 * Activity Action: Send a message to someone specified by the data.
1100 * <p>Input: {@link #getData} is URI describing the target.
1101 * <p>Output: nothing.
1102 */
1103 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1104 public static final String ACTION_SENDTO = "android.intent.action.SENDTO";
ACTION_SEND发送数据
1105 /**
1106 * Activity Action: Deliver some data to someone else. Who the data is
1107 * being delivered to is not specified; it is up to the receiver of this
1108 * action to ask the user where the data should be sent.
1109 * <p>
1110 * When launching a SEND intent, you should usually wrap it in a chooser
1111 * (through {@link #createChooser}), which will give the proper interface
1112 * for the user to pick how to send your data and allow you to specify
1113 * a prompt indicating what they are doing.
1114 * <p>
1115 * Input: {@link #getType} is the MIME type of the data being sent.
1116 * get*Extra can have either a {@link #EXTRA_TEXT}
1117 * or {@link #EXTRA_STREAM} field, containing the data to be sent. If
1118 * using EXTRA_TEXT, the MIME type should be "text/plain"; otherwise it
1119 * should be the MIME type of the data in EXTRA_STREAM. Use {@literal *}/*
1120 * if the MIME type is unknown (this will only allow senders that can
1121 * handle generic data streams). If using {@link #EXTRA_TEXT}, you can
1122 * also optionally supply {@link #EXTRA_HTML_TEXT} for clients to retrieve
1123 * your text with HTML formatting.
1124 * <p>
1125 * As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, the data
1126 * being sent can be supplied through {@link #setClipData(ClipData)}. This
1127 * allows you to use {@link #FLAG_GRANT_READ_URI_PERMISSION} when sharing
1128 * content: URIs and other advanced features of {@link ClipData}. If
1129 * using this approach, you still must supply the same data through the
1130 * {@link #EXTRA_TEXT} or {@link #EXTRA_STREAM} fields described below
1131 * for compatibility with old applications. If you don't set a ClipData,
1132 * it will be copied there for you when calling {@link Context#startActivity(Intent)}.
1133 * <p>
1134 * Optional standard extras, which may be interpreted by some recipients as
1135 * appropriate, are: {@link #EXTRA_EMAIL}, {@link #EXTRA_CC},
1136 * {@link #EXTRA_BCC}, {@link #EXTRA_SUBJECT}.
1137 * <p>
1138 * Output: nothing.
1139 */
1140 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1141 public static final String ACTION_SEND = "android.intent.action.SEND";
ACTION_SEND_MULTIPLE发送多个数据
1142 /**
1143 * Activity Action: Deliver multiple data to someone else.
1144 * <p>
1145 * Like {@link #ACTION_SEND}, except the data is multiple.
1146 * <p>
1147 * Input: {@link #getType} is the MIME type of the data being sent.
1148 * get*ArrayListExtra can have either a {@link #EXTRA_TEXT} or {@link
1149 * #EXTRA_STREAM} field, containing the data to be sent. If using
1150 * {@link #EXTRA_TEXT}, you can also optionally supply {@link #EXTRA_HTML_TEXT}
1151 * for clients to retrieve your text with HTML formatting.
1152 * <p>
1153 * Multiple types are supported, and receivers should handle mixed types
1154 * whenever possible. The right way for the receiver to check them is to
1155 * use the content resolver on each URI. The intent sender should try to
1156 * put the most concrete mime type in the intent type, but it can fall
1157 * back to {@literal <type>/*} or {@literal *}/* as needed.
1158 * <p>
1159 * e.g. if you are sending image/jpg and image/jpg, the intent's type can
1160 * be image/jpg, but if you are sending image/jpg and image/png, then the
1161 * intent's type should be image/*.
1162 * <p>
1163 * As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, the data
1164 * being sent can be supplied through {@link #setClipData(ClipData)}. This
1165 * allows you to use {@link #FLAG_GRANT_READ_URI_PERMISSION} when sharing
1166 * content: URIs and other advanced features of {@link ClipData}. If
1167 * using this approach, you still must supply the same data through the
1168 * {@link #EXTRA_TEXT} or {@link #EXTRA_STREAM} fields described below
1169 * for compatibility with old applications. If you don't set a ClipData,
1170 * it will be copied there for you when calling {@link Context#startActivity(Intent)}.
1171 * <p>
1172 * Optional standard extras, which may be interpreted by some recipients as
1173 * appropriate, are: {@link #EXTRA_EMAIL}, {@link #EXTRA_CC},
1174 * {@link #EXTRA_BCC}, {@link #EXTRA_SUBJECT}.
1175 * <p>
1176 * Output: nothing.
1177 */
1178 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1179 public static final String ACTION_SEND_MULTIPLE = "android.intent.action.SEND_MULTIPLE";
1180 /**
ACTION_ANSWER用来接电话
1180 /**
1181 * Activity Action: Handle an incoming phone call.
1182 * <p>Input: nothing.
1183 * <p>Output: nothing.
1184 */
1185 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1186 public static final String ACTION_ANSWER = "android.intent.action.ANSWER";
ACTION_INSERT用来插入数据
1187 /**
1188 * Activity Action: Insert an empty item into the given container.
1189 * <p>Input: {@link #getData} is URI of the directory (vnd.android.cursor.dir/*)
1190 * in which to place the data.
1191 * <p>Output: URI of the new data that was created.
1192 */
1193 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1194 public static final String ACTION_INSERT = "android.intent.action.INSERT";
ACTION_PASTE从剪切板里粘贴数据
1195 /**
1196 * Activity Action: Create a new item in the given container, initializing it
1197 * from the current contents of the clipboard.
1198 * <p>Input: {@link #getData} is URI of the directory (vnd.android.cursor.dir/*)
1199 * in which to place the data.
1200 * <p>Output: URI of the new data that was created.
1201 */
1202 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1203 public static final String ACTION_PASTE = "android.intent.action.PASTE";
ACTION_DELETE删除数据
1204 /**
1205 * Activity Action: Delete the given data from its container.
1206 * <p>Input: {@link #getData} is URI of data to be deleted.
1207 * <p>Output: nothing.
1208 */
1209 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1210 public static final String ACTION_DELETE = "android.intent.action.DELETE";
ACTION_RUN运行相应数据
1211 /**
1212 * Activity Action: Run the data, whatever that means.
1213 * <p>Input: ? (Note: this is currently specific to the test harness.)
1214 * <p>Output: nothing.
1215 */
1216 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1217 public static final String ACTION_RUN = "android.intent.action.RUN";
ACTION_SYNC同步数据
1218 /**
1219 * Activity Action: Perform a data synchronization.
1220 * <p>Input: ?
1221 * <p>Output: ?
1222 */
1223 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1224 public static final String ACTION_SYNC = "android.intent.action.SYNC";
ACTION_PICK_ACTIVITY选取符合相应Intent-filter的Activity类名
1225 /**
1226 * Activity Action: Pick an activity given an intent, returning the class
1227 * selected.
1228 * <p>Input: get*Extra field {@link #EXTRA_INTENT} is an Intent
1229 * used with {@link PackageManager#queryIntentActivities} to determine the
1230 * set of activities from which to pick.
1231 * <p>Output: Class name of the activity that was selected.
1232 */
1233 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1234 public static final String ACTION_PICK_ACTIVITY = "android.intent.action.PICK_ACTIVITY";
ACTION_SEARCH用来搜索
1235 /**
1236 * Activity Action: Perform a search.
1237 * <p>Input: {@link android.app.SearchManager#QUERY getStringExtra(SearchManager.QUERY)}
1238 * is the text to search for. If empty, simply
1239 * enter your search results Activity with the search UI activated.
1240 * <p>Output: nothing.
1241 */
1242 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1243 public static final String ACTION_SEARCH = "android.intent.action.SEARCH";
1244 /**
ACTION_SYSTEM_TUTORIAL启动系统定义的教程
1244 /**
1245 * Activity Action: Start the platform-defined tutorial
1246 * <p>Input: {@link android.app.SearchManager#QUERY getStringExtra(SearchManager.QUERY)}
1247 * is the text to search for. If empty, simply
1248 * enter your search results Activity with the search UI activated.
1249 * <p>Output: nothing.
1250 */
1251 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1252 public static final String ACTION_SYSTEM_TUTORIAL = "android.intent.action.SYSTEM_TUTORIAL";
ACTION_WEB_SEARCH做网络搜索
1253 /**
1254 * Activity Action: Perform a web search.
1255 * <p>
1256 * Input: {@link android.app.SearchManager#QUERY
1257 * getStringExtra(SearchManager.QUERY)} is the text to search for. If it is
1258 * a url starts with http or https, the site will be opened. If it is plain
1259 * text, Google search will be applied.
1260 * <p>
1261 * Output: nothing.
1262 */
1263 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1264 public static final String ACTION_WEB_SEARCH = "android.intent.action.WEB_SEARCH";
1265
ACTION_ASSIST用来做辅助操作
1266 /**
1267 * Activity Action: Perform assist action.
1268 * <p>
1269 * Input: {@link #EXTRA_ASSIST_PACKAGE}, {@link #EXTRA_ASSIST_CONTEXT}, can provide
1270 * additional optional contextual information about where the user was when they
1271 * requested the assist; {@link #EXTRA_REFERRER} may be set with additional referrer
1272 * information.
1273 * Output: nothing.
1274 */
1275 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1276 public static final String ACTION_ASSIST = "android.intent.action.ASSIST";
ACTION_VOICE_ASSIST做语音辅助
1278 /**
1279 * Activity Action: Perform voice assist action.
1280 * <p>
1281 * Input: {@link #EXTRA_ASSIST_PACKAGE}, {@link #EXTRA_ASSIST_CONTEXT}, can provide
1282 * additional optional contextual information about where the user was when they
1283 * requested the voice assist.
1284 * Output: nothing.
1285 * @hide
1286 */
1287 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1288 public static final String ACTION_VOICE_ASSIST = "android.intent.action.VOICE_ASSIST";
EXTRA_ASSIST_PACKAGE为正在辅助的前台程序包名，EXTRA_ASSIST_UID为正在辅助的前台程序UID，EXTRA_ASSIST_CONTEXT为正在辅助的程序的上下文环境，EXTRA_ASSIST_INPUT_HINT_KEYBOARD提示使用键盘为主要辅助输入设备，EXTRA_ASSIST_INPUT_DEVICE_ID为辅助设备的device id
1290 /**
1291 * An optional field on {@link #ACTION_ASSIST} containing the name of the current foreground
1292 * application package at the time the assist was invoked.
1293 */
1294 public static final String EXTRA_ASSIST_PACKAGE
1295 = "android.intent.extra.ASSIST_PACKAGE";
1296
1297 /**
1298 * An optional field on {@link #ACTION_ASSIST} containing the uid of the current foreground
1299 * application package at the time the assist was invoked.
1300 */
1301 public static final String EXTRA_ASSIST_UID
1302 = "android.intent.extra.ASSIST_UID";
1303
1304 /**
1305 * An optional field on {@link #ACTION_ASSIST} and containing additional contextual
1306 * information supplied by the current foreground app at the time of the assist request.
1307 * This is a {@link Bundle} of additional data.
1308 */
1309 public static final String EXTRA_ASSIST_CONTEXT
1310 = "android.intent.extra.ASSIST_CONTEXT";
1311
1312 /**
1313 * An optional field on {@link #ACTION_ASSIST} suggesting that the user will likely use a
1314 * keyboard as the primary input device for assistance.
1315 */
1316 public static final String EXTRA_ASSIST_INPUT_HINT_KEYBOARD =
1317 "android.intent.extra.ASSIST_INPUT_HINT_KEYBOARD";
1318
1319 /**
1320 * An optional field on {@link #ACTION_ASSIST} containing the InputDevice id
1321 * that was used to invoke the assist.
1322 */
1323 public static final String EXTRA_ASSIST_INPUT_DEVICE_ID =
1324 "android.intent.extra.ASSIST_INPUT_DEVICE_ID";
ACTION_ALL_APPS列出所有APP
1326 /**
1327 * Activity Action: List all available applications.
1328 * <p>Input: Nothing.
1329 * <p>Output: nothing.
1330 */
1331 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1332 public static final String ACTION_ALL_APPS = "android.intent.action.ALL_APPS";
ACTION_SET_WALLPAPER显示壁纸设置界面
1333 /**
1334 * Activity Action: Show settings for choosing wallpaper.
1335 * <p>Input: Nothing.
1336 * <p>Output: Nothing.
1337 */
1338 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1339 public static final String ACTION_SET_WALLPAPER = "android.intent.action.SET_WALLPAPER";
ACTION_BUG_REPORT显示bug report界面
1341 /**
1342 * Activity Action: Show activity for reporting a bug.
1343 * <p>Input: Nothing.
1344 * <p>Output: Nothing.
1345 */
1346 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1347 public static final String ACTION_BUG_REPORT = "android.intent.action.BUG_REPORT";
ACTION_FACTORY_TEST启动工厂测试app
1349 /**
1350 * Activity Action: Main entry point for factory tests. Only used when
1351 * the device is booting in factory test node. The implementing package
1352 * must be installed in the system image.
1353 * <p>Input: nothing
1354 * <p>Output: nothing
1355 */
1356 public static final String ACTION_FACTORY_TEST = "android.intent.action.FACTORY_TEST";
ACTION_CALL_BUTTON显示CALL UI
1358 /**
1359 * Activity Action: The user pressed the "call" button to go to the dialer
1360 * or other appropriate UI for placing a call.
1361 * <p>Input: Nothing.
1362 * <p>Output: Nothing.
1363 */
1364 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1365 public static final String ACTION_CALL_BUTTON = "android.intent.action.CALL_BUTTON";
1366
ACTION_VOICE_COMMAND打开语音指令
1367 /**
1368 * Activity Action: Start Voice Command.
1369 * <p>Input: Nothing.
1370 * <p>Output: Nothing.
1371 */
1372 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1373 public static final String ACTION_VOICE_COMMAND = "android.intent.action.VOICE_COMMAND";
ACTION_SEARCH_LONG_PRESS启动与长按search关联的动作
1375 /**
1376 * Activity Action: Start action associated with long pressing on the
1377 * search key.
1378 * <p>Input: Nothing.
1379 * <p>Output: Nothing.
1380 */
1381 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1382 public static final String ACTION_SEARCH_LONG_PRESS = "android.intent.action.SEARCH_LONG_PRESS";
ACTION_APP_ERROR报告crash/ANR信息
1384 /**
1385 * Activity Action: The user pressed the "Report" button in the crash/ANR dialog.
1386 * This intent is delivered to the package which installed the application, usually
1387 * Google Play.
1388 * <p>Input: No data is specified. The bug report is passed in using
1389 * an {@link #EXTRA_BUG_REPORT} field.
1390 * <p>Output: Nothing.
1391 *
1392 * @see #EXTRA_BUG_REPORT
1393 */
1394 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1395 public static final String ACTION_APP_ERROR = "android.intent.action.APP_ERROR";
1396
ACTION_POWER_USAGE_SUMMARY显示power使用情况
1397 /**
1398 * Activity Action: Show power usage information to the user.
1399 * <p>Input: Nothing.
1400 * <p>Output: Nothing.
1401 */
1402 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1403 public static final String ACTION_POWER_USAGE_SUMMARY = "android.intent.action.POWER_USAGE_SUMMARY";
1404
ACTION_UPGRADE_SETUP在平台升级后启动设置向导
1405 /**
1406 * Activity Action: Setup wizard to launch after a platform update. This
1407 * activity should have a string meta-data field associated with it,
1408 * {@link #METADATA_SETUP_VERSION}, which defines the current version of
1409 * the platform for setup. The activity will be launched only if
1410 * {@link android.provider.Settings.Secure#LAST_SETUP_SHOWN} is not the
1411 * same value.
1412 * <p>Input: Nothing.
1413 * <p>Output: Nothing.
1414 * @hide
1415 */
1416 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1417 public static final String ACTION_UPGRADE_SETUP = "android.intent.action.UPGRADE_SETUP";
ACTION_SHOW_KEYBOARD_SHORTCUTS启动键盘快捷助手屏幕
1419 /**
1420 * Activity Action: Start the Keyboard Shortcuts Helper screen.
1421 * <p>Input: Nothing.
1422 * <p>Output: Nothing.
1423 * @hide
1424 */
1425 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1426 public static final String ACTION_SHOW_KEYBOARD_SHORTCUTS =
1427 "android.intent.action.SHOW_KEYBOARD_SHORTCUTS";
ACTION_DISMISS_KEYBOARD_SHORTCUTS解除键盘快捷助手
1429 /**
1430 * Activity Action: Dismiss the Keyboard Shortcuts Helper screen.
1431 * <p>Input: Nothing.
1432 * <p>Output: Nothing.
1433 * @hide
1434 */
1435 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1436 public static final String ACTION_DISMISS_KEYBOARD_SHORTCUTS =
1437 "android.intent.action.DISMISS_KEYBOARD_SHORTCUTS";
ACTION_MANAGER_NETWORK_USAGE启动网络流量统计界面
1439 /**
1440 * Activity Action: Show settings for managing network data usage of a
1441 * specific application. Applications should define an activity that offers
1442 * options to control data usage.
1443 */
1444 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1445 public static final String ACTION_MANAGE_NETWORK_USAGE =
1446 "android.intent.action.MANAGE_NETWORK_USAGE";
ACTION_INSTALL_PACKAGE启动app安装界面
1448 /**
1449 * Activity Action: Launch application installer.
1450 * <p>
1451 * Input: The data must be a content: or file: URI at which the application
1452 * can be retrieved. As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1},
1453 * you can also use "package:<package-name>" to install an application for the
1454 * current user that is already installed for another user. You can optionally supply
1455 * {@link #EXTRA_INSTALLER_PACKAGE_NAME}, {@link #EXTRA_NOT_UNKNOWN_SOURCE},
1456 * {@link #EXTRA_ALLOW_REPLACE}, and {@link #EXTRA_RETURN_RESULT}.
1457 * <p>
1458 * Output: If {@link #EXTRA_RETURN_RESULT}, returns whether the install
1459 * succeeded.
1460 * <p>
1461 * <strong>Note:</strong>If your app is targeting API level higher than 22 you
1462 * need to hold {@link android.Manifest.permission#REQUEST_INSTALL_PACKAGES}
1463 * in order to launch the application installer.
1464 * </p>
1465 *
1466 * @see #EXTRA_INSTALLER_PACKAGE_NAME
1467 * @see #EXTRA_NOT_UNKNOWN_SOURCE
1468 * @see #EXTRA_RETURN_RESULT
1469 */
1470 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1471 public static final String ACTION_INSTALL_PACKAGE = "android.intent.action.INSTALL_PACKAGE";
ACTION_INSTALL_EPHEMERAL_PACKAGE和ACTION_RESOLVE_EPHEMERAl_PACKAGE和暂时行app有关，一个启动临时app安装器，一个是解析临时app
1473 /**
1474 * Activity Action: Launch ephemeral installer.
1475 * <p>
1476 * Input: The data must be a http: URI that the ephemeral application is registered
1477 * to handle.
1478 * <p class="note">
1479 * This is a protected intent that can only be sent by the system.
1480 * </p>
1481 *
1482 * @hide
1483 */
1484 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1485 public static final String ACTION_INSTALL_EPHEMERAL_PACKAGE
1486 = "android.intent.action.INSTALL_EPHEMERAL_PACKAGE";
1487
1488 /**
1489 * Service Action: Resolve ephemeral application.
1490 * <p>
1491 * The system will have a persistent connection to this service.
1492 * This is a protected intent that can only be sent by the system.
1493 * </p>
1494 *
1495 * @hide
1496 */
1497 @SdkConstant(SdkConstantType.SERVICE_ACTION)
1498 public static final String ACTION_RESOLVE_EPHEMERAL_PACKAGE
1499 = "android.intent.action.RESOLVE_EPHEMERAL_PACKAGE";
1500
与相关的几个EXTRA，分别是安装的包的名字，是否是未知源安装，app来源，谁发出启动动作的详细信息的URI，谁发出启动动作的详细信息的String，安装发起者UID，是否允许替换，是否返回安装/卸载成功标志，安装结果标志
1501 /**
1502 * Used as a string extra field with {@link #ACTION_INSTALL_PACKAGE} to install a
1503 * package. Specifies the installer package name; this package will receive the
1504 * {@link #ACTION_APP_ERROR} intent.
1505 */
1506 public static final String EXTRA_INSTALLER_PACKAGE_NAME
1507 = "android.intent.extra.INSTALLER_PACKAGE_NAME";
1508
1509 /**
1510 * Used as a boolean extra field with {@link #ACTION_INSTALL_PACKAGE} to install a
1511 * package. Specifies that the application being installed should not be
1512 * treated as coming from an unknown source, but as coming from the app
1513 * invoking the Intent. For this to work you must start the installer with
1514 * startActivityForResult().
1515 */
1516 public static final String EXTRA_NOT_UNKNOWN_SOURCE
1517 = "android.intent.extra.NOT_UNKNOWN_SOURCE";
1518
1519 /**
1520 * Used as a URI extra field with {@link #ACTION_INSTALL_PACKAGE} and
1521 * {@link #ACTION_VIEW} to indicate the URI from which the local APK in the Intent
1522 * data field originated from.
1523 */
1524 public static final String EXTRA_ORIGINATING_URI
1525 = "android.intent.extra.ORIGINATING_URI";
1526
1527 /**
1528 * This extra can be used with any Intent used to launch an activity, supplying information
1529 * about who is launching that activity. This field contains a {@link android.net.Uri}
1530 * object, typically an http: or https: URI of the web site that the referral came from;
1531 * it can also use the {@link #URI_ANDROID_APP_SCHEME android-app:} scheme to identify
1532 * a native application that it came from.
1533 *
1534 * <p>To retrieve this value in a client, use {@link android.app.Activity#getReferrer}
1535 * instead of directly retrieving the extra. It is also valid for applications to
1536 * instead supply {@link #EXTRA_REFERRER_NAME} for cases where they can only create
1537 * a string, not a Uri; the field here, if supplied, will always take precedence,
1538 * however.</p>
1539 *
1540 * @see #EXTRA_REFERRER_NAME
1541 */
1542 public static final String EXTRA_REFERRER
1543 = "android.intent.extra.REFERRER";
1544
1545 /**
1546 * Alternate version of {@link #EXTRA_REFERRER} that supplies the URI as a String rather
1547 * than a {@link android.net.Uri} object. Only for use in cases where Uri objects can
1548 * not be created, in particular when Intent extras are supplied through the
1549 * {@link #URI_INTENT_SCHEME intent:} or {@link #URI_ANDROID_APP_SCHEME android-app:}
1550 * schemes.
1551 *
1552 * @see #EXTRA_REFERRER
1553 */
1554 public static final String EXTRA_REFERRER_NAME
1555 = "android.intent.extra.REFERRER_NAME";
1556
1557 /**
1558 * Used as an int extra field with {@link #ACTION_INSTALL_PACKAGE} and
1559 * {@link #ACTION_VIEW} to indicate the uid of the package that initiated the install
1560 * @hide
1561 */
1562 @SystemApi
1563 public static final String EXTRA_ORIGINATING_UID
1564 = "android.intent.extra.ORIGINATING_UID";
1565
1566 /**
1567 * Used as a boolean extra field with {@link #ACTION_INSTALL_PACKAGE} to install a
1568 * package. Tells the installer UI to skip the confirmation with the user
1569 * if the .apk is replacing an existing one.
1570 * @deprecated As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, Android
1571 * will no longer show an interstitial message about updating existing
1572 * applications so this is no longer needed.
1573 */
1574 @Deprecated
1575 public static final String EXTRA_ALLOW_REPLACE
1576 = "android.intent.extra.ALLOW_REPLACE";
1577
1578 /**
1579 * Used as a boolean extra field with {@link #ACTION_INSTALL_PACKAGE} or
1580 * {@link #ACTION_UNINSTALL_PACKAGE}. Specifies that the installer UI should
1581 * return to the application the result code of the install/uninstall. The returned result
1582 * code will be {@link android.app.Activity#RESULT_OK} on success or
1583 * {@link android.app.Activity#RESULT_FIRST_USER} on failure.
1584 */
1585 public static final String EXTRA_RETURN_RESULT
1586 = "android.intent.extra.RETURN_RESULT";
1587
1588 /**
1589 * Package manager install result code. @hide because result codes are not
1590 * yet ready to be exposed.
1591 */
1592 public static final String EXTRA_INSTALL_RESULT
1593 = "android.intent.extra.INSTALL_RESULT";
1594
ACTION_UNINSTALL_PACKAGE卸载应用，EXTRA_UNINSTALL_ALL_USERS表明是否为所有user卸载
1595 /**
1596 * Activity Action: Launch application uninstaller.
1597 * <p>
1598 * Input: The data must be a package: URI whose scheme specific part is
1599 * the package name of the current installed package to be uninstalled.
1600 * You can optionally supply {@link #EXTRA_RETURN_RESULT}.
1601 * <p>
1602 * Output: If {@link #EXTRA_RETURN_RESULT}, returns whether the install
1603 * succeeded.
1604 */
1605 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1606 public static final String ACTION_UNINSTALL_PACKAGE = "android.intent.action.UNINSTALL_PACKAGE";
1607
1608 /**
1609 * Specify whether the package should be uninstalled for all users.
1610 * @hide because these should not be part of normal application flow.
1611 */
1612 public static final String EXTRA_UNINSTALL_ALL_USERS
1613 = "android.intent.extra.UNINSTALL_ALL_USERS";
METADATA_SETUP_VERSION为当前平台版本
1615 /**
1616 * A string associated with a {@link #ACTION_UPGRADE_SETUP} activity
1617 * describing the last run version of the platform that was setup.
1618 * @hide
1619 */
1620 public static final String METADATA_SETUP_VERSION = "android.SETUP_VERSION";
ACTION_MANAGE_APP_PERMISSIONS和ACTION_MANAGE_PERMISSIONS启动UI管理权限
1622 /**
1623 * Activity action: Launch UI to manage the permissions of an app.
1624 * <p>
1625 * Input: {@link #EXTRA_PACKAGE_NAME} specifies the package whose permissions
1626 * will be managed by the launched UI.
1627 * </p>
1628 * <p>
1629 * Output: Nothing.
1630 * </p>
1631 *
1632 * @see #EXTRA_PACKAGE_NAME
1633 *
1634 * @hide
1635 */
1636 @SystemApi
1637 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1638 public static final String ACTION_MANAGE_APP_PERMISSIONS =
1639 "android.intent.action.MANAGE_APP_PERMISSIONS";
1640
1641 /**
1642 * Activity action: Launch UI to manage permissions.
1643 * <p>
1644 * Input: Nothing.
1645 * </p>
1646 * <p>
1647 * Output: Nothing.
1648 * </p>
1649 *
1650 * @hide
1651 */
1652 @SystemApi
1653 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1654 public static final String ACTION_MANAGE_PERMISSIONS =
1655 "android.intent.action.MANAGE_PERMISSIONS";
1656
ACTION_REVIEW_PERMISSIONS，review app的权限
1657 /**
1658 * Activity action: Launch UI to review permissions for an app.
1659 * The system uses this intent if permission review for apps not
1660 * supporting the new runtime permissions model is enabled. In
1661 * this mode a permission review is required before any of the
1662 * app components can run.
1663 * <p>
1664 * Input: {@link #EXTRA_PACKAGE_NAME} specifies the package whose
1665 * permissions will be reviewed (mandatory).
1666 * </p>
1667 * <p>
1668 * Input: {@link #EXTRA_INTENT} specifies a pending intent to
1669 * be fired after the permission review (optional).
1670 * </p>
1671 * <p>
1672 * Input: {@link #EXTRA_REMOTE_CALLBACK} specifies a callback to
1673 * be invoked after the permission review (optional).
1674 * </p>
1675 * <p>
1676 * Input: {@link #EXTRA_RESULT_NEEDED} specifies whether the intent
1677 * passed via {@link #EXTRA_INTENT} needs a result (optional).
1678 * </p>
1679 * <p>
1680 * Output: Nothing.
1681 * </p>
1682 *
1683 * @see #EXTRA_PACKAGE_NAME
1684 * @see #EXTRA_INTENT
1685 * @see #EXTRA_REMOTE_CALLBACK
1686 * @see #EXTRA_RESULT_NEEDED
1687 *
1688 * @hide
1689 */
1690 @SystemApi
1691 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1692 public static final String ACTION_REVIEW_PERMISSIONS =
1693 "android.intent.action.REVIEW_PERMISSIONS";
下面的EXTRA与ACTION_REVIEW_PERMISSIONS有关，EXTRA_REMOTE_CALLBACK为报告远程结果的回调bundle，EXTRA_PACKAGE_NAME为包名，EXTRA_RESULT_NEEDED说明是否需要返回结果
1695 /**
1696 * Intent extra: A callback for reporting remote result as a bundle.
1697 * <p>
1698 * Type: IRemoteCallback
1699 * </p>
1700 *
1701 * @hide
1702 */
1703 @SystemApi
1704 public static final String EXTRA_REMOTE_CALLBACK = "android.intent.extra.REMOTE_CALLBACK";
1705
1706 /**
1707 * Intent extra: An app package name.
1708 * <p>
1709 * Type: String
1710 * </p>
1711 *
1712 */
1713 public static final String EXTRA_PACKAGE_NAME = "android.intent.extra.PACKAGE_NAME";
1714
1715 /**
1716 * Intent extra: An extra for specifying whether a result is needed.
1717 * <p>
1718 * Type: boolean
1719 * </p>
1720 *
1721 * @hide
1722 */
1723 @SystemApi
1724 public static final String EXTRA_RESULT_NEEDED = "android.intent.extra.RESULT_NEEDED";
1725
ACTION_MANAGE_PERMISSION_APPS列举拥有某个权限的app，EXTRA_PERMISSION_NAME为权限名
1726 /**
1727 * Activity action: Launch UI to manage which apps have a given permission.
1728 * <p>
1729 * Input: {@link #EXTRA_PERMISSION_NAME} specifies the permission access
1730 * to which will be managed by the launched UI.
1731 * </p>
1732 * <p>
1733 * Output: Nothing.
1734 * </p>
1735 *
1736 * @see #EXTRA_PERMISSION_NAME
1737 *
1738 * @hide
1739 */
1740 @SystemApi
1741 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1742 public static final String ACTION_MANAGE_PERMISSION_APPS =
1743 "android.intent.action.MANAGE_PERMISSION_APPS";
1744
1745 /**
1746 * Intent extra: The name of a permission.
1747 * <p>
1748 * Type: String
1749 * </p>
1750 *
1751 * @hide
1752 */
1753 @SystemApi
1754 public static final String EXTRA_PERMISSION_NAME = "android.intent.extra.PERMISSION_NAME";
1755
下面开始是给BroadcastReceiver接收处理的Action，表明了状态的改变
ACTION_SCREEN_OFF和ACTION_SCREEN_ON对应手机是否可交互，而不是手机是否屏亮屏灭
1756 // ---------------------------------------------------------------------
1757 // ---------------------------------------------------------------------
1758 // Standard intent broadcast actions (see action variable).
1759
1760 /**
1761 * Broadcast Action: Sent when the device goes to sleep and becomes non-interactive.
1762 * <p>
1763 * For historical reasons, the name of this broadcast action refers to the power
1764 * state of the screen but it is actually sent in response to changes in the
1765 * overall interactive state of the device.
1766 * </p><p>
1767 * This broadcast is sent when the device becomes non-interactive which may have
1768 * nothing to do with the screen turning off. To determine the
1769 * actual state of the screen, use {@link android.view.Display#getState}.
1770 * </p><p>
1771 * See {@link android.os.PowerManager#isInteractive} for details.
1772 * </p>
1773 * You <em>cannot</em> receive this through components declared in
1774 * manifests, only by explicitly registering for it with
1775 * {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
1776 * Context.registerReceiver()}.
1777 *
1778 * <p class="note">This is a protected intent that can only be sent
1779 * by the system.
1780 */
1781 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1782 public static final String ACTION_SCREEN_OFF = "android.intent.action.SCREEN_OFF";
1783
1784 /**
1785 * Broadcast Action: Sent when the device wakes up and becomes interactive.
1786 * <p>
1787 * For historical reasons, the name of this broadcast action refers to the power
1788 * state of the screen but it is actually sent in response to changes in the
1789 * overall interactive state of the device.
1790 * </p><p>
1791 * This broadcast is sent when the device becomes interactive which may have
1792 * nothing to do with the screen turning on. To determine the
1793 * actual state of the screen, use {@link android.view.Display#getState}.
1794 * </p><p>
1795 * See {@link android.os.PowerManager#isInteractive} for details.
1796 * </p>
1797 * You <em>cannot</em> receive this through components declared in
1798 * manifests, only by explicitly registering for it with
1799 * {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
1800 * Context.registerReceiver()}.
1801 *
1802 * <p class="note">This is a protected intent that can only be sent
1803 * by the system.
1804 */
1805 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1806 public static final String ACTION_SCREEN_ON = "android.intent.action.SCREEN_ON";
ACTION_DREAMING_STOPPED和ACTION_DREAMING_STARTED表明屏保开始与停止
1808 /**
1809 * Broadcast Action: Sent after the system stops dreaming.
1810 *
1811 * <p class="note">This is a protected intent that can only be sent by the system.
1812 * It is only sent to registered receivers.</p>
1813 */
1814 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1815 public static final String ACTION_DREAMING_STOPPED = "android.intent.action.DREAMING_STOPPED";
1816
1817 /**
1818 * Broadcast Action: Sent after the system starts dreaming.
1819 *
1820 * <p class="note">This is a protected intent that can only be sent by the system.
1821 * It is only sent to registered receivers.</p>
1822 */
1823 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1824 public static final String ACTION_DREAMING_STARTED = "android.intent.action.DREAMING_STARTED";
ACTION_USER_PRESENT表明设备唤醒后用户呈现出来
1826 /**
1827 * Broadcast Action: Sent when the user is present after device wakes up (e.g when the
1828 * keyguard is gone).
1829 *
1830 * <p class="note">This is a protected intent that can only be sent
1831 * by the system.
1832 */
1833 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1834 public static final String ACTION_USER_PRESENT = "android.intent.action.USER_PRESENT";
ACTION_TIME_TICK表明时间改变了；ACTION_TIME_CHANGED表明时间被设置；ACTION_DATE_CHANGED表明日期被改变；ACTION_TIMEZONE_CHANGED表明时间区被改变
1836 /**
1837 * Broadcast Action: The current time has changed. Sent every
1838 * minute. You <em>cannot</em> receive this through components declared
1839 * in manifests, only by explicitly registering for it with
1840 * {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
1841 * Context.registerReceiver()}.
1842 *
1843 * <p class="note">This is a protected intent that can only be sent
1844 * by the system.
1845 */
1846 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1847 public static final String ACTION_TIME_TICK = "android.intent.action.TIME_TICK";
1848 /**
1849 * Broadcast Action: The time was set.
1850 */
1851 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1852 public static final String ACTION_TIME_CHANGED = "android.intent.action.TIME_SET";
1853 /**
1854 * Broadcast Action: The date has changed.
1855 */
1856 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1857 public static final String ACTION_DATE_CHANGED = "android.intent.action.DATE_CHANGED";
1858 /**
1859 * Broadcast Action: The timezone has changed. The intent will have the following extra values:</p>
1860 * <ul>
1861 * <li><em>time-zone</em> - The java.util.TimeZone.getID() value identifying the new time zone.</li>
1862 * </ul>
1863 *
1864 * <p class="note">This is a protected intent that can only be sent
1865 * by the system.
1866 */
1867 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
33 1868 public static final String ACTION_TIMEZONE_CHANGED = "android.intent.action.TIMEZONE_CHANGED";
ACTION_CLEAR_DNS_CACHE表明DNS改变了
1869 /**
1870 * Clear DNS Cache Action: This is broadcast when networks have changed and old
1871 * DNS entries should be tossed.
1872 * @hide
1873 */
1874 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1875 public static final String ACTION_CLEAR_DNS_CACHE = "android.intent.action.CLEAR_DNS_CACHE";
ACTION_ALARM_CHANGED表明alarm设置或被取消
1876 /**
1877 * Alarm Changed Action: This is broadcast when the AlarmClock
1878 * application's alarm is set or unset. It is used by the
1879 * AlarmClock application and the StatusBar service.
1880 * @hide
1881 */
1882 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1883 public static final String ACTION_ALARM_CHANGED = "android.intent.action.ALARM_CHANGED";
1884
ACTION_LOCKED_BOOT_COMPLETE表明启动完成，没解锁；ACTION_BOOT_COMPLETE表明启动完成，也解锁了
1885 /**
1886 * Broadcast Action: This is broadcast once, after the user has finished
1887 * booting, but while still in the "locked" state. It can be used to perform
1888 * application-specific initialization, such as installing alarms. You must
1889 * hold the {@link android.Manifest.permission#RECEIVE_BOOT_COMPLETED}
1890 * permission in order to receive this broadcast.
1891 * <p>
1892 * This broadcast is sent immediately at boot by all devices (regardless of
1893 * direct boot support) running {@link android.os.Build.VERSION_CODES#N} or
1894 * higher. Upon receipt of this broadcast, the user is still locked and only
1895 * device-protected storage can be accessed safely. If you want to access
1896 * credential-protected storage, you need to wait for the user to be
1897 * unlocked (typically by entering their lock pattern or PIN for the first
1898 * time), after which the {@link #ACTION_USER_UNLOCKED} and
1899 * {@link #ACTION_BOOT_COMPLETED} broadcasts are sent.
1900 * <p>
1901 * To receive this broadcast, your receiver component must be marked as
1902 * being {@link ComponentInfo#directBootAware}.
1903 * <p class="note">
1904 * This is a protected intent that can only be sent by the system.
1905 *
1906 * @see Context#createDeviceProtectedStorageContext()
1907 */
1908 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1909 public static final String ACTION_LOCKED_BOOT_COMPLETED = "android.intent.action.LOCKED_BOOT_COMPLETED";
1910
1911 /**
1912 * Broadcast Action: This is broadcast once, after the user has finished
1913 * booting. It can be used to perform application-specific initialization,
1914 * such as installing alarms. You must hold the
1915 * {@link android.Manifest.permission#RECEIVE_BOOT_COMPLETED} permission in
1916 * order to receive this broadcast.
1917 * <p>
1918 * This broadcast is sent at boot by all devices (both with and without
1919 * direct boot support). Upon receipt of this broadcast, the user is
1920 * unlocked and both device-protected and credential-protected storage can
1921 * accessed safely.
1922 * <p>
1923 * If you need to run while the user is still locked (before they've entered
1924 * their lock pattern or PIN for the first time), you can listen for the
1925 * {@link #ACTION_LOCKED_BOOT_COMPLETED} broadcast.
1926 * <p class="note">
1927 * This is a protected intent that can only be sent by the system.
1928 */
1929 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1930 public static final String ACTION_BOOT_COMPLETED = "android.intent.action.BOOT_COMPLETED";
ACTION_CLOSE_SYSTEM_DIALOGS通知关闭临时系统对话框
1931
1932 /**
1933 * Broadcast Action: This is broadcast when a user action should request a
1934 * temporary system dialog to dismiss. Some examples of temporary system
1935 * dialogs are the notification window-shade and the recent tasks dialog.
1936 */
1937 public static final String ACTION_CLOSE_SYSTEM_DIALOGS = "android.intent.action.CLOSE_SYSTEM_DIALOGS";
1938 /**
ACTION_PACKAGE_INSTALL触发安装一个包，已被废弃
1938 /**
1939 * Broadcast Action: Trigger the download and eventual installation
1940 * of a package.
1941 * <p>Input: {@link #getData} is the URI of the package file to download.
1942 *
1943 * <p class="note">This is a protected intent that can only be sent
1944 * by the system.
1945 *
1946 * @deprecated This constant has never been used.
1947 */
1948 @Deprecated
1949 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1950 public static final String ACTION_PACKAGE_INSTALL = "android.intent.action.PACKAGE_INSTALL";
ACTION_PACKAGE_ADDED,ACTION_PACKAGE_REPLACED表明PACKAGE被安装和被更新
1951 /**
1952 * Broadcast Action: A new application package has been installed on the
1953 * device. The data contains the name of the package. Note that the
1954 * newly installed package does <em>not</em> receive this broadcast.
1955 * <p>May include the following extras:
1956 * <ul>
1957 * <li> {@link #EXTRA_UID} containing the integer uid assigned to the new package.
1958 * <li> {@link #EXTRA_REPLACING} is set to true if this is following
1959 * an {@link #ACTION_PACKAGE_REMOVED} broadcast for the same package.
1960 * </ul>
1961 *
1962 * <p class="note">This is a protected intent that can only be sent
1963 * by the system.
1964 */
1965 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1966 public static final String ACTION_PACKAGE_ADDED = "android.intent.action.PACKAGE_ADDED";
1967 /**
1968 * Broadcast Action: A new version of an application package has been
1969 * installed, replacing an existing version that was previously installed.
1970 * The data contains the name of the package.
1971 * <p>May include the following extras:
1972 * <ul>
1973 * <li> {@link #EXTRA_UID} containing the integer uid assigned to the new package.
1974 * </ul>
1975 *
1976 * <p class="note">This is a protected intent that can only be sent
1977 * by the system.
1978 */
1979 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1980 public static final String ACTION_PACKAGE_REPLACED = "android.intent.action.PACKAGE_REPLACED";
ACTION_MY_PACKAGE_RELACED表明当前app被更新
1981 /**
1982 * Broadcast Action: A new version of your application has been installed
1983 * over an existing one. This is only sent to the application that was
1984 * replaced. It does not contain any additional data; to receive it, just
1985 * use an intent filter for this action.
1986 *
1987 * <p class="note">This is a protected intent that can only be sent
1988 * by the system.
1989 */
1990 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1991 public static final String ACTION_MY_PACKAGE_REPLACED = "android.intent.action.MY_PACKAGE_REPLACED";
ACTION_PACKAGE_REMOVED表明app被删除，ACTION_PACKAGE_COMPLETELY_REMOVED表明被彻底删除，code和data都没了，也不会被后续replaced
1992 /**
1993 * Broadcast Action: An existing application package has been removed from
1994 * the device. The data contains the name of the package. The package
1995 * that is being removed does <em>not</em> receive this Intent.
1996 * <ul>
1997 * <li> {@link #EXTRA_UID} containing the integer uid previously assigned
1998 * to the package.
1999 * <li> {@link #EXTRA_DATA_REMOVED} is set to true if the entire
2000 * application -- data and code -- is being removed.
2001 * <li> {@link #EXTRA_REPLACING} is set to true if this will be followed
2002 * by an {@link #ACTION_PACKAGE_ADDED} broadcast for the same package.
2003 * </ul>
2004 *
2005 * <p class="note">This is a protected intent that can only be sent
2006 * by the system.
2007 */
2008 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2009 public static final String ACTION_PACKAGE_REMOVED = "android.intent.action.PACKAGE_REMOVED";
2010 /**
2011 * Broadcast Action: An existing application package has been completely
2012 * removed from the device. The data contains the name of the package.
2013 * This is like {@link #ACTION_PACKAGE_REMOVED}, but only set when
2014 * {@link #EXTRA_DATA_REMOVED} is true and
2015 * {@link #EXTRA_REPLACING} is false of that broadcast.
2016 *
2017 * <ul>
2018 * <li> {@link #EXTRA_UID} containing the integer uid previously assigned
2019 * to the package.
2020 * </ul>
2021 *
2022 * <p class="note">This is a protected intent that can only be sent
2023 * by the system.
2024 */
2025 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2026 public static final String ACTION_PACKAGE_FULLY_REMOVED
2027 = "android.intent.action.PACKAGE_FULLY_REMOVED";
ACTION_PACKAGE_CHANGED表明某个app package被改变了，比如某个component被使能。
2028 /**
2029 * Broadcast Action: An existing application package has been changed (for
2030 * example, a component has been enabled or disabled). The data contains
2031 * the name of the package.
2032 * <ul>
2033 * <li> {@link #EXTRA_UID} containing the integer uid assigned to the package.
2034 * <li> {@link #EXTRA_CHANGED_COMPONENT_NAME_LIST} containing the class name
2035 * of the changed components (or the package name itself).
2036 * <li> {@link #EXTRA_DONT_KILL_APP} containing boolean field to override the
2037 * default action of restarting the application.
2038 * </ul>
2039 *
2040 * <p class="note">This is a protected intent that can only be sent
2041 * by the system.
2042 */
2043 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2044 public static final String ACTION_PACKAGE_CHANGED = "android.intent.action.PACKAGE_CHANGED";
ACTION_QUERY_PACKAGE_RESTART询问系统package是否需要被重启
2045 /**
2046 * @hide
2047 * Broadcast Action: Ask system services if there is any reason to
2048 * restart the given package. The data contains the name of the
2049 * package.
2050 * <ul>
2051 * <li> {@link #EXTRA_UID} containing the integer uid assigned to the package.
2052 * <li> {@link #EXTRA_PACKAGES} String array of all packages to check.
2053 * </ul>
2054 *
2055 * <p class="note">This is a protected intent that can only be sent
2056 * by the system.
2057 */
2058 @SystemApi
2059 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2060 public static final String ACTION_QUERY_PACKAGE_RESTART = "android.intent.action.QUERY_PACKAGE_RESTART";
ACTION_PACKAGE_RESTARTED表明某个package被restarted了
2061 /**
2062 * Broadcast Action: The user has restarted a package, and all of its
2063 * processes have been killed. All runtime state
2064 * associated with it (processes, alarms, notifications, etc) should
2065 * be removed. Note that the restarted package does <em>not</em>
2066 * receive this broadcast.
2067 * The data contains the name of the package.
2068 * <ul>
2069 * <li> {@link #EXTRA_UID} containing the integer uid assigned to the package.
2070 * </ul>
2071 *
2072 * <p class="note">This is a protected intent that can only be sent
2073 * by the system.
2074 */
2075 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2076 public static final String ACTION_PACKAGE_RESTARTED = "android.intent.action.PACKAGE_RESTARTED";
ACTION_PACKAGE_DATA_CLEARED表明程序数据被清空；ACTION_PACKAGES_SUSPENDED表明package被挂起;ACTION_PACKAGES_UNSUSPEND表明package被唤醒；ACTION_UID_REMOVED表明某个UID的用户被移除了
2077 /**
2078 * Broadcast Action: The user has cleared the data of a package. This should
2079 * be preceded by {@link #ACTION_PACKAGE_RESTARTED}, after which all of
2080 * its persistent data is erased and this broadcast sent.
2081 * Note that the cleared package does <em>not</em>
2082 * receive this broadcast. The data contains the name of the package.
2083 * <ul>
2084 * <li> {@link #EXTRA_UID} containing the integer uid assigned to the package.
2085 * </ul>
2086 *
2087 * <p class="note">This is a protected intent that can only be sent
2088 * by the system.
2089 */
2090 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2091 public static final String ACTION_PACKAGE_DATA_CLEARED = "android.intent.action.PACKAGE_DATA_CLEARED";
2092 /**
2093 * Broadcast Action: Packages have been suspended.
2094 * <p>Includes the following extras:
2095 * <ul>
2096 * <li> {@link #EXTRA_CHANGED_PACKAGE_LIST} is the set of packages which have been suspended
2097 * </ul>
2098 *
2099 * <p class="note">This is a protected intent that can only be sent
2100 * by the system. It is only sent to registered receivers.
2101 */
2102 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2103 public static final String ACTION_PACKAGES_SUSPENDED = "android.intent.action.PACKAGES_SUSPENDED";
2104 /**
2105 * Broadcast Action: Packages have been unsuspended.
2106 * <p>Includes the following extras:
2107 * <ul>
2108 * <li> {@link #EXTRA_CHANGED_PACKAGE_LIST} is the set of packages which have been unsuspended
2109 * </ul>
2110 *
2111 * <p class="note">This is a protected intent that can only be sent
2112 * by the system. It is only sent to registered receivers.
2113 */
2114 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2115 public static final String ACTION_PACKAGES_UNSUSPENDED = "android.intent.action.PACKAGES_UNSUSPENDED";
2116 /**
2117 * Broadcast Action: A user ID has been removed from the system. The user
2118 * ID number is stored in the extra data under {@link #EXTRA_UID}.
2119 *
2120 * <p class="note">This is a protected intent that can only be sent
2121 * by the system.
2122 */
2123 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2124 public static final String ACTION_UID_REMOVED = "android.intent.action.UID_REMOVED";
ACTION_PACKAGE_FIRST_LAUNCH帮忙package第一次被启动；ACTION_PACKAGE_NEEDS_VERIFICATION表明package要被验证；ACTION_PACKAGE_VERIFIED表明package已经被验证过
2126 /**
2127 * Broadcast Action: Sent to the installer package of an application when
2128 * that application is first launched (that is the first time it is moved
2129 * out of the stopped state). The data contains the name of the package.
2130 *
2131 * <p class="note">This is a protected intent that can only be sent
2132 * by the system.
2133 */
2134 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2135 public static final String ACTION_PACKAGE_FIRST_LAUNCH = "android.intent.action.PACKAGE_FIRST_LAUNCH";
2136
2137 /**
2138 * Broadcast Action: Sent to the system package verifier when a package
2139 * needs to be verified. The data contains the package URI.
2140 * <p class="note">
2141 * This is a protected intent that can only be sent by the system.
2142 * </p>
2143 */
2144 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2145 public static final String ACTION_PACKAGE_NEEDS_VERIFICATION = "android.intent.action.PACKAGE_NEEDS_VERIFICATION";
2146
2147 /**
2148 * Broadcast Action: Sent to the system package verifier when a package is
2149 * verified. The data contains the package URI.
2150 * <p class="note">
2151 * This is a protected intent that can only be sent by the system.
2152 */
2153 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2154 public static final String ACTION_PACKAGE_VERIFIED = "android.intent.action.PACKAGE_VERIFIED";
2155
ACTION_INTENT_FILTER_NEEDS_VERIFICATION告诉系统intent filter verifier，有intent filter需要verification
2156 /**
2157 * Broadcast Action: Sent to the system intent filter verifier when an
2158 * intent filter needs to be verified. The data contains the filter data
2159 * hosts to be verified against.
2160 * <p class="note">
2161 * This is a protected intent that can only be sent by the system.
2162 * </p>
2163 *
2164 * @hide
2165 */
2166 @SystemApi
2167 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2168 public static final String ACTION_INTENT_FILTER_NEEDS_VERIFICATION = "android.intent.action.INTENT_FILTER_NEEDS_VERIFICATION";
ACTION_EXTERNAL_APPLICATIONS_AVAILABLE,ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE表明在外部媒体介质上的应用程序列表可用和不可用
2170 /**
2171 * Broadcast Action: Resources for a set of packages (which were
2172 * previously unavailable) are currently
2173 * available since the media on which they exist is available.
2174 * The extra data {@link #EXTRA_CHANGED_PACKAGE_LIST} contains a
2175 * list of packages whose availability changed.
2176 * The extra data {@link #EXTRA_CHANGED_UID_LIST} contains a
2177 * list of uids of packages whose availability changed.
2178 * Note that the
2179 * packages in this list do <em>not</em> receive this broadcast.
2180 * The specified set of packages are now available on the system.
2181 * <p>Includes the following extras:
2182 * <ul>
2183 * <li> {@link #EXTRA_CHANGED_PACKAGE_LIST} is the set of packages
2184 * whose resources(were previously unavailable) are currently available.
2185 * {@link #EXTRA_CHANGED_UID_LIST} is the set of uids of the
2186 * packages whose resources(were previously unavailable)
2187 * are currently available.
2188 * </ul>
2189 *
2190 * <p class="note">This is a protected intent that can only be sent
2191 * by the system.
2192 */
2193 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2194 public static final String ACTION_EXTERNAL_APPLICATIONS_AVAILABLE =
2195 "android.intent.action.EXTERNAL_APPLICATIONS_AVAILABLE";
2196
2197 /**
2198 * Broadcast Action: Resources for a set of packages are currently
2199 * unavailable since the media on which they exist is unavailable.
2200 * The extra data {@link #EXTRA_CHANGED_PACKAGE_LIST} contains a
2201 * list of packages whose availability changed.
2202 * The extra data {@link #EXTRA_CHANGED_UID_LIST} contains a
2203 * list of uids of packages whose availability changed.
2204 * The specified set of packages can no longer be
2205 * launched and are practically unavailable on the system.
2206 * <p>Inclues the following extras:
2207 * <ul>
2208 * <li> {@link #EXTRA_CHANGED_PACKAGE_LIST} is the set of packages
2209 * whose resources are no longer available.
2210 * {@link #EXTRA_CHANGED_UID_LIST} is the set of packages
2211 * whose resources are no longer available.
2212 * </ul>
2213 *
2214 * <p class="note">This is a protected intent that can only be sent
2215 * by the system.
2216 */
2217 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2218 public static final String ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE =
2219 "android.intent.action.EXTERNAL_APPLICATIONS_UNAVAILABLE";
2220
ACTION_PREFERRED_ACTIVITY_CHANGED表明被优先选择的activity有改动
221 /**
2222 * Broadcast Action: preferred activities have changed *explicitly*.
2223 *
2224 * <p>Note there are cases where a preferred activity is invalidated *implicitly*, e.g.
2225 * when an app is installed or uninstalled, but in such cases this broadcast will *not*
2226 * be sent.
2227 *
2228 * {@link #EXTRA_USER_HANDLE} contains the user ID in question.
2229 *
2230 * @hide
2231 */
2232 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2233 public static final String ACTION_PREFERRED_ACTIVITY_CHANGED =
2234 "android.intent.action.ACTION_PREFERRED_ACTIVITY_CHANGED";
2235
ACTION_WALLPAPER_CHANGED表明壁纸被改了，已被弃用
2237 /**
2238 * Broadcast Action: The current system wallpaper has changed. See
2239 * {@link android.app.WallpaperManager} for retrieving the new wallpaper.
2240 * This should <em>only</em> be used to determine when the wallpaper
2241 * has changed to show the new wallpaper to the user. You should certainly
2242 * never, in response to this, change the wallpaper or other attributes of
2243 * it such as the suggested size. That would be crazy, right? You'd cause
2244 * all kinds of loops, especially if other apps are doing similar things,
2245 * right? Of course. So please don't do this.
2246 *
2247 * @deprecated Modern applications should use
2248 * {@link android.view.WindowManager.LayoutParams#FLAG_SHOW_WALLPAPER
2249 * WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER} to have the wallpaper
2250 * shown behind their UI, rather than watching for this broadcast and
2251 * rendering the wallpaper on their own.
2252 */
2253 @Deprecated @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2254 public static final String ACTION_WALLPAPER_CHANGED = "android.intent.action.WALLPAPER_CHANGED";
ACTION_CONFIGURATION_CHANGED表明配置被改变了，比如地区，定向等
2255 /**
2256 * Broadcast Action: The current device {@link android.content.res.Configuration}
2257 * (orientation, locale, etc) has changed. When such a change happens, the
2258 * UIs (view hierarchy) will need to be rebuilt based on this new
2259 * information; for the most part, applications don't need to worry about
2260 * this, because the system will take care of stopping and restarting the
2261 * application to make sure it sees the new changes. Some system code that
2262 * can not be restarted will need to watch for this action and handle it
2263 * appropriately.
2264 *
2265 * <p class="note">
2266 * You <em>cannot</em> receive this through components declared
2267 * in manifests, only by explicitly registering for it with
2268 * {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
2269 * Context.registerReceiver()}.
2270 *
2271 * <p class="note">This is a protected intent that can only be sent
2272 * by the system.
2273 *
2274 * @see android.content.res.Configuration
2275 */
2276 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2277 public static final String ACTION_CONFIGURATION_CHANGED = "android.intent.action.CONFIGURATION_CHANGED";
ACTION_LOCALE_CHANGED表明地区改变
2278 /**
2279 * Broadcast Action: The current device's locale has changed.
2280 *
2281 * <p class="note">This is a protected intent that can only be sent
2282 * by the system.
2283 */
2284 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2285 public static final String ACTION_LOCALE_CHANGED = "android.intent.action.LOCALE_CHANGED";
ACTION_BATTER_CHANGED表明battery长点状态与级别被改变；ACTION_BATTERY_LOW表明电量低；ACTION_BATTERY_OK表明电量不低了
2286 /**
2287 * Broadcast Action: This is a <em>sticky broadcast</em> containing the
2288 * charging state, level, and other information about the battery.
2289 * See {@link android.os.BatteryManager} for documentation on the
2290 * contents of the Intent.
2291 *
2292 * <p class="note">
2293 * You <em>cannot</em> receive this through components declared
2294 * in manifests, only by explicitly registering for it with
2295 * {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
2296 * Context.registerReceiver()}. See {@link #ACTION_BATTERY_LOW},
2297 * {@link #ACTION_BATTERY_OKAY}, {@link #ACTION_POWER_CONNECTED},
2298 * and {@link #ACTION_POWER_DISCONNECTED} for distinct battery-related
2299 * broadcasts that are sent and can be received through manifest
2300 * receivers.
2301 *
2302 * <p class="note">This is a protected intent that can only be sent
2303 * by the system.
2304 */
2305 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2306 public static final String ACTION_BATTERY_CHANGED = "android.intent.action.BATTERY_CHANGED";
2307 /**
2308 * Broadcast Action: Indicates low battery condition on the device.
2309 * This broadcast corresponds to the "Low battery warning" system dialog.
2310 *
2311 * <p class="note">This is a protected intent that can only be sent
2312 * by the system.
2313 */
2314 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2315 public static final String ACTION_BATTERY_LOW = "android.intent.action.BATTERY_LOW";
2316 /**
2317 * Broadcast Action: Indicates the battery is now okay after being low.
2318 * This will be sent after {@link #ACTION_BATTERY_LOW} once the battery has
2319 * gone back up to an okay state.
2320 *
2321 * <p class="note">This is a protected intent that can only be sent
2322 * by the system.
2323 */
2324 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2325 public static final String ACTION_BATTERY_OKAY = "android.intent.action.BATTERY_OKAY";
2326 /**
ACTION_POWER_CONNECTED和ACTION_POWER_DISCONNECTED表明充电器连接和断开
2326 /**
2327 * Broadcast Action: External power has been connected to the device.
2328 * This is intended for applications that wish to register specifically to this notification.
2329 * Unlike ACTION_BATTERY_CHANGED, applications will be woken for this and so do not have to
2330 * stay active to receive this notification. This action can be used to implement actions
2331 * that wait until power is available to trigger.
2332 *
2333 * <p class="note">This is a protected intent that can only be sent
2334 * by the system.
2335 */
2336 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2337 public static final String ACTION_POWER_CONNECTED = "android.intent.action.ACTION_POWER_CONNECTED";
2338 /**
2339 * Broadcast Action: External power has been removed from the device.
2340 * This is intended for applications that wish to register specifically to this notification.
2341 * Unlike ACTION_BATTERY_CHANGED, applications will be woken for this and so do not have to
2342 * stay active to receive this notification. This action can be used to implement actions
2343 * that wait until power is available to trigger.
2344 *
2345 * <p class="note">This is a protected intent that can only be sent
2346 * by the system.
2347 */
2348 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2349 public static final String ACTION_POWER_DISCONNECTED =
2350 "android.intent.action.ACTION_POWER_DISCONNECTED";
ACTION_SHUTDOWN和ACTION_REQUEST_SHUTDOWN表明系统开始shutdown和要求shutdown
2351 /**
2352 * Broadcast Action: Device is shutting down.
2353 * This is broadcast when the device is being shut down (completely turned
2354 * off, not sleeping). Once the broadcast is complete, the final shutdown
2355 * will proceed and all unsaved data lost. Apps will not normally need
2356 * to handle this, since the foreground activity will be paused as well.
2357 *
2358 * <p class="note">This is a protected intent that can only be sent
2359 * by the system.
2360 * <p>May include the following extras:
2361 * <ul>
2362 * <li> {@link #EXTRA_SHUTDOWN_USERSPACE_ONLY} a boolean that is set to true if this
2363 * shutdown is only for userspace processes. If not set, assumed to be false.
2364 * </ul>
2365 */
2366 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2367 public static final String ACTION_SHUTDOWN = "android.intent.action.ACTION_SHUTDOWN";
2368 /**
2369 * Activity Action: Start this activity to request system shutdown.
2370 * The optional boolean extra field {@link #EXTRA_KEY_CONFIRM} can be set to true
2371 * to request confirmation from the user before shutting down. The optional boolean
2372 * extra field {@link #EXTRA_USER_REQUESTED_SHUTDOWN} can be set to true to
2373 * indicate that the shutdown is requested by the user.
2374 *
2375 * <p class="note">This is a protected intent that can only be sent
2376 * by the system.
2377 *
2378 * {@hide}
2379 */
2380 public static final String ACTION_REQUEST_SHUTDOWN = "android.intent.action.ACTION_REQUEST_SHUTDOWN";
ACTION_DEVICE_STORAGE_LOW表明设备存储低；ACTION_DEVICE_STORAGE_OK表明设备存储不在低；ACTION_DEVICE_STORAGE_FULL表明设备存储空间已满；ACTION_DEVICE_STORAGE_NOT_FULL表明设备存储空间不在已满
2381 /**
2382 * Broadcast Action: A sticky broadcast that indicates low memory
2383 * condition on the device
2384 *
2385 * <p class="note">This is a protected intent that can only be sent
2386 * by the system.
2387 */
2388 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2389 public static final String ACTION_DEVICE_STORAGE_LOW = "android.intent.action.DEVICE_STORAGE_LOW";
2390 /**
2391 * Broadcast Action: Indicates low memory condition on the device no longer exists
2392 *
2393 * <p class="note">This is a protected intent that can only be sent
2394 * by the system.
2395 */
2396 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2397 public static final String ACTION_DEVICE_STORAGE_OK = "android.intent.action.DEVICE_STORAGE_OK";
2398 /**
2399 * Broadcast Action: A sticky broadcast that indicates a memory full
2400 * condition on the device. This is intended for activities that want
2401 * to be able to fill the data partition completely, leaving only
2402 * enough free space to prevent system-wide SQLite failures.
2403 *
2404 * <p class="note">This is a protected intent that can only be sent
2405 * by the system.
2406 *
2407 * {@hide}
2408 */
2409 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2410 public static final String ACTION_DEVICE_STORAGE_FULL = "android.intent.action.DEVICE_STORAGE_FULL";
2411 /**
2412 * Broadcast Action: Indicates memory full condition on the device
2413 * no longer exists.
2414 *
2415 * <p class="note">This is a protected intent that can only be sent
2416 * by the system.
2417 *
2418 * {@hide}
2419 */
2420 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2421 public static final String ACTION_DEVICE_STORAGE_NOT_FULL = "android.intent.action.DEVICE_STORAGE_NOT_FULL";
ACTION_MANAGE_PACKAGE_STORAGE表明存储空间已满，要来管理存储空间
2422 /**
2423 * Broadcast Action: Indicates low memory condition notification acknowledged by user
2424 * and package management should be started.
2425 * This is triggered by the user from the ACTION_DEVICE_STORAGE_LOW
2426 * notification.
2427 */
2428 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2429 public static final String ACTION_MANAGE_PACKAGE_STORAGE = "android.intent.action.MANAGE_PACKAGE_STORAGE";
ACTION_UMS_CONNECTED表明进入USB MASS Storage模式;ACTION_UMS_DISCONNECTED表明断开USB Mass Storage模式。这两个已经被废弃
2430 /**
2431 * Broadcast Action: The device has entered USB Mass Storage mode.
2432 * This is used mainly for the USB Settings panel.
2433 * Apps should listen for ACTION_MEDIA_MOUNTED and ACTION_MEDIA_UNMOUNTED broadcasts to be notified
2434 * when the SD card file system is mounted or unmounted
2435 * @deprecated replaced by android.os.storage.StorageEventListener
2436 */
2437 @Deprecated
2438 public static final String ACTION_UMS_CONNECTED = "android.intent.action.UMS_CONNECTED";
2439
2440 /**
2441 * Broadcast Action: The device has exited USB Mass Storage mode.
2442 * This is used mainly for the USB Settings panel.
2443 * Apps should listen for ACTION_MEDIA_MOUNTED and ACTION_MEDIA_UNMOUNTED broadcasts to be notified
2444 * when the SD card file system is mounted or unmounted
2445 * @deprecated replaced by android.os.storage.StorageEventListener
2446 */
2447 @Deprecated
2448 public static final String ACTION_UMS_DISCONNECTED = "android.intent.action.UMS_DISCONNECTED";
ACTION_MEDIA_REMOVED表明外部媒介已经被移除；ACTION_MEIDA_UNMOUNTED表明外部媒介被unmount了；ACTION_MEIDA_CHECKING表明媒介正在被检查；ACTION_MEDIA_NOFS表明外部媒介上没有fs；ACTION_MEDIA_MOUNTED表明外部媒介已经被挂载；ACTION_MEIDA_SHARED表明外部存储介质被share为UMS；ACTION_MEDIA_UNSHARED表明外部媒介不再被share成UMS；ACTION_MEDIA_BAD_REMOVAL表明外部sd卡不在了，但是没有unmount；ACTION_MEDIA_UNMOUNTABLE表明外部媒介存在但是无法mount；ACTION_MEDIA_EJECT表明设备被弹出；ACTION_MEDIA_SCANNER_STARTED表明媒介扫描开始；ACTION_MEDIA_SCANNER_FINISHED表明媒介扫描结束；ACTION_MEDIA_SCANNER_SCAN_FILE表明请求外部媒介扫描某个文件并加入媒体数据库；ACTION_MEDIA_BUTTON表明media按钮被按下
2450 /**
2451 * Broadcast Action: External media has been removed.
2452 * The path to the mount point for the removed media is contained in the Intent.mData field.
2453 */
2454 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2455 public static final String ACTION_MEDIA_REMOVED = "android.intent.action.MEDIA_REMOVED";
2456
2457 /**
2458 * Broadcast Action: External media is present, but not mounted at its mount point.
2459 * The path to the mount point for the unmounted media is contained in the Intent.mData field.
2460 */
2461 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2462 public static final String ACTION_MEDIA_UNMOUNTED = "android.intent.action.MEDIA_UNMOUNTED";
2463
2464 /**
2465 * Broadcast Action: External media is present, and being disk-checked
2466 * The path to the mount point for the checking media is contained in the Intent.mData field.
2467 */
2468 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2469 public static final String ACTION_MEDIA_CHECKING = "android.intent.action.MEDIA_CHECKING";
2470
2471 /**
2472 * Broadcast Action: External media is present, but is using an incompatible fs (or is blank)
2473 * The path to the mount point for the checking media is contained in the Intent.mData field.
2474 */
2475 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2476 public static final String ACTION_MEDIA_NOFS = "android.intent.action.MEDIA_NOFS";
2477
2478 /**
2479 * Broadcast Action: External media is present and mounted at its mount point.
2480 * The path to the mount point for the mounted media is contained in the Intent.mData field.
2481 * The Intent contains an extra with name "read-only" and Boolean value to indicate if the
2482 * media was mounted read only.
2483 */
2484 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2485 public static final String ACTION_MEDIA_MOUNTED = "android.intent.action.MEDIA_MOUNTED";
2486
2487 /**
2488 * Broadcast Action: External media is unmounted because it is being shared via USB mass storage.
2489 * The path to the mount point for the shared media is contained in the Intent.mData field.
2490 */
2491 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2492 public static final String ACTION_MEDIA_SHARED = "android.intent.action.MEDIA_SHARED";
2493
2494 /**
2495 * Broadcast Action: External media is no longer being shared via USB mass storage.
2496 * The path to the mount point for the previously shared media is contained in the Intent.mData field.
2497 *
2498 * @hide
2499 */
2500 public static final String ACTION_MEDIA_UNSHARED = "android.intent.action.MEDIA_UNSHARED";
2501
2502 /**
2503 * Broadcast Action: External media was removed from SD card slot, but mount point was not unmounted.
2504 * The path to the mount point for the removed media is contained in the Intent.mData field.
2505 */
2506 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2507 public static final String ACTION_MEDIA_BAD_REMOVAL = "android.intent.action.MEDIA_BAD_REMOVAL";
2508
2509 /**
2510 * Broadcast Action: External media is present but cannot be mounted.
2511 * The path to the mount point for the unmountable media is contained in the Intent.mData field.
2512 */
2513 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2514 public static final String ACTION_MEDIA_UNMOUNTABLE = "android.intent.action.MEDIA_UNMOUNTABLE";
2515
2516 /**
2517 * Broadcast Action: User has expressed the desire to remove the external storage media.
2518 * Applications should close all files they have open within the mount point when they receive this intent.
2519 * The path to the mount point for the media to be ejected is contained in the Intent.mData field.
2520 */
2521 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2522 public static final String ACTION_MEDIA_EJECT = "android.intent.action.MEDIA_EJECT";
2523
2524 /**
2525 * Broadcast Action: The media scanner has started scanning a directory.
2526 * The path to the directory being scanned is contained in the Intent.mData field.
2527 */
2528 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2529 public static final String ACTION_MEDIA_SCANNER_STARTED = "android.intent.action.MEDIA_SCANNER_STARTED";
2530
2531 /**
2532 * Broadcast Action: The media scanner has finished scanning a directory.
2533 * The path to the scanned directory is contained in the Intent.mData field.
2534 */
2535 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2536 public static final String ACTION_MEDIA_SCANNER_FINISHED = "android.intent.action.MEDIA_SCANNER_FINISHED";
2537
2538 /**
2539 * Broadcast Action: Request the media scanner to scan a file and add it to the media database.
2540 * The path to the file is contained in the Intent.mData field.
2541 */
2542 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2543 public static final String ACTION_MEDIA_SCANNER_SCAN_FILE = "android.intent.action.MEDIA_SCANNER_SCAN_FILE";
2544
2545 /**
2546 * Broadcast Action: The "Media Button" was pressed. Includes a single
2547 * extra field, {@link #EXTRA_KEY_EVENT}, containing the key event that
2548 * caused the broadcast.
2549 */
2550 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2551 public static final String ACTION_MEDIA_BUTTON = "android.intent.action.MEDIA_BUTTON";
ACTION_CAMERA_BUTTON表明camera按钮被按下了
2552
2553 /**
2554 * Broadcast Action: The "Camera Button" was pressed. Includes a single
2555 * extra field, {@link #EXTRA_KEY_EVENT}, containing the key event that
2556 * caused the broadcast.
2557 */
2558 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2559 public static final String ACTION_CAMERA_BUTTON = "android.intent.action.CAMERA_BUTTON";
ACTION_GTALK_SERVICE_CONNECTED和ACTION_GTALK_SERVICE_DISCONNECTED表明gtalk服务连接和断开
2561 // *** NOTE: @todo(*) The following really should go into a more domain-specific
2562 // location; they are not general-purpose actions.
2563
2564 /**
2565 * Broadcast Action: A GTalk connection has been established.
2566 */
2567 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2568 public static final String ACTION_GTALK_SERVICE_CONNECTED =
2569 "android.intent.action.GTALK_CONNECTED";
2570
2571 /**
2572 * Broadcast Action: A GTalk connection has been disconnected.
2573 */
2574 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2575 public static final String ACTION_GTALK_SERVICE_DISCONNECTED =
2576 "android.intent.action.GTALK_DISCONNECTED";
2577
ACTION_INPUT_METHOD_CHANGED表明输入法改变
2578 /**
2579 * Broadcast Action: An input method has been changed.
2580 */
2581 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2582 public static final String ACTION_INPUT_METHOD_CHANGED =
2583 "android.intent.action.INPUT_METHOD_CHANGED";
2584
ACTION_AIRPLANE_MODE_CHANGED表明进入还是退出飞行模式
2585 /**
2586 * <p>Broadcast Action: The user has switched the phone into or out of Airplane Mode. One or
2587 * more radios have been turned off or on. The intent will have the following extra value:</p>
2588 * <ul>
2589 * <li><em>state</em> - A boolean value indicating whether Airplane Mode is on. If true,
2590 * then cell radio and possibly other radios such as bluetooth or WiFi may have also been
2591 * turned off</li>
2592 * </ul>
2593 *
2594 * <p class="note">This is a protected intent that can only be sent by the system.</p>
2595 */
2596 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2597 public static final String ACTION_AIRPLANE_MODE_CHANGED = "android.intent.action.AIRPLANE_MODE";
ACTION_PROVIDER_CHANGED表明content provider维护的内容有变化。
2599 /**
2600 * Broadcast Action: Some content providers have parts of their namespace
2601 * where they publish new events or items that the user may be especially
2602 * interested in. For these things, they may broadcast this action when the
2603 * set of interesting items change.
2604 *
2605 * For example, GmailProvider sends this notification when the set of unread
2606 * mail in the inbox changes.
2607 *
2608 * <p>The data of the intent identifies which part of which provider
2609 * changed. When queried through the content resolver, the data URI will
2610 * return the data set in question.
2611 *
2612 * <p>The intent will have the following extra values:
2613 * <ul>
2614 * <li><em>count</em> - The number of items in the data set. This is the
2615 * same as the number of items in the cursor returned by querying the
2616 * data URI. </li>
2617 * </ul>
2618 *
2619 * This intent will be sent at boot (if the count is non-zero) and when the
2620 * data set changes. It is possible for the data set to change without the
2621 * count changing (for example, if a new unread message arrives in the same
2622 * sync operation in which a message is archived). The phone should still
2623 * ring/vibrate/etc as normal in this case.
2624 */
2625 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2626 public static final String ACTION_PROVIDER_CHANGED =
2627 "android.intent.action.PROVIDER_CHANGED";
ACTION_HEADSET_PLUG表明有耳机插入或拔出
2629 /**
2630 * Broadcast Action: Wired Headset plugged in or unplugged.
2631 *
2632 * Same as {@link android.media.AudioManager#ACTION_HEADSET_PLUG}, to be consulted for value
2633 * and documentation.
2634 * <p>If the minimum SDK version of your application is
2635 * {@link android.os.Build.VERSION_CODES#LOLLIPOP}, it is recommended to refer
2636 * to the <code>AudioManager</code> constant in your receiver registration code instead.
2637 */
2638 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2639 public static final String ACTION_HEADSET_PLUG = android.media.AudioManager.ACTION_HEADSET_PLUG;
ACTION_ADVANCED_SETTINGS_CHANGED表明切换到了高级设置上
2641 /**
2642 * <p>Broadcast Action: The user has switched on advanced settings in the settings app:</p>
2643 * <ul>
2644 * <li><em>state</em> - A boolean value indicating whether the settings is on or off.</li>
2645 * </ul>
2646 *
2647 * <p class="note">This is a protected intent that can only be sent
2648 * by the system.
2649 *
2650 * @hide
2651 */
2652 //@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2653 public static final String ACTION_ADVANCED_SETTINGS_CHANGED
2654 = "android.intent.action.ADVANCED_SETTINGS";
ACTION_APPLICATION_RESTRICTRATIONS_CHANGED表明应用限制被改变
2656 /**
2657 * Broadcast Action: Sent after application restrictions are changed.
2658 *
2659 * <p class="note">This is a protected intent that can only be sent
2660 * by the system.</p>
2661 */
2662 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2663 public static final String ACTION_APPLICATION_RESTRICTIONS_CHANGED =
2664 "android.intent.action.APPLICATION_RESTRICTIONS_CHANGED";
ACTION_NEW_OUTGOING_CALL表明有新的外拨电话，可以接受这个Intent修改要拨出的号码或者阻止拨出
2666 /**
2667 * Broadcast Action: An outgoing call is about to be placed.
2668 *
2669 * <p>The Intent will have the following extra value:</p>
2670 * <ul>
2671 * <li><em>{@link android.content.Intent#EXTRA_PHONE_NUMBER}</em> -
2672 * the phone number originally intended to be dialed.</li>
2673 * </ul>
2674 * <p>Once the broadcast is finished, the resultData is used as the actual
2675 * number to call. If <code>null</code>, no call will be placed.</p>
2676 * <p>It is perfectly acceptable for multiple receivers to process the
2677 * outgoing call in turn: for example, a parental control application
2678 * might verify that the user is authorized to place the call at that
2679 * time, then a number-rewriting application might add an area code if
2680 * one was not specified.</p>
2681 * <p>For consistency, any receiver whose purpose is to prohibit phone
2682 * calls should have a priority of 0, to ensure it will see the final
2683 * phone number to be dialed.
2684 * Any receiver whose purpose is to rewrite phone numbers to be called
2685 * should have a positive priority.
2686 * Negative priorities are reserved for the system for this broadcast;
2687 * using them may cause problems.</p>
2688 * <p>Any BroadcastReceiver receiving this Intent <em>must not</em>
2689 * abort the broadcast.</p>
2690 * <p>Emergency calls cannot be intercepted using this mechanism, and
2691 * other calls cannot be modified to call emergency numbers using this
2692 * mechanism.
2693 * <p>Some apps (such as VoIP apps) may want to redirect the outgoing
2694 * call to use their own service instead. Those apps should first prevent
2695 * the call from being placed by setting resultData to <code>null</code>
2696 * and then start their own app to make the call.
2697 * <p>You must hold the
2698 * {@link android.Manifest.permission#PROCESS_OUTGOING_CALLS}
2699 * permission to receive this Intent.</p>
2700 *
2701 * <p class="note">This is a protected intent that can only be sent
2702 * by the system.
2703 */
2704 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2705 public static final String ACTION_NEW_OUTGOING_CALL =
2706 "android.intent.action.NEW_OUTGOING_CALL";
2707
ACTION_REBOOT要求设备reboot
2708 /**
2709 * Broadcast Action: Have the device reboot. This is only for use by
2710 * system code.
2711 *
2712 * <p class="note">This is a protected intent that can only be sent
2713 * by the system.
2714 */
2715 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2716 public static final String ACTION_REBOOT =
2717 "android.intent.action.REBOOT";
ACTION_DOCK_EVENT表明dock状态改变
2719 /**
2720 * Broadcast Action: A sticky broadcast for changes in the physical
2721 * docking state of the device.
2722 *
2723 * <p>The intent will have the following extra values:
2724 * <ul>
2725 * <li><em>{@link #EXTRA_DOCK_STATE}</em> - the current dock
2726 * state, indicating which dock the device is physically in.</li>
2727 * </ul>
2728 * <p>This is intended for monitoring the current physical dock state.
2729 * See {@link android.app.UiModeManager} for the normal API dealing with
2730 * dock mode changes.
2731 */
2732 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2733 public static final String ACTION_DOCK_EVENT =
2734 "android.intent.action.DOCK_EVENT";
ACTION_IDLE_MAINTENCE_START和ACTION_IDLE_MAINTENCE_STOP表明设备不与用户交互，可以做耗时的动作，需要拿wakelock来保证设备不会睡眠
2736 /**
2737 * Broadcast Action: A broadcast when idle maintenance can be started.
2738 * This means that the user is not interacting with the device and is
2739 * not expected to do so soon. Typical use of the idle maintenance is
2740 * to perform somehow expensive tasks that can be postponed at a moment
2741 * when they will not degrade user experience.
2742 * <p>
2743 * <p class="note">In order to keep the device responsive in case of an
2744 * unexpected user interaction, implementations of a maintenance task
2745 * should be interruptible. In such a scenario a broadcast with action
2746 * {@link #ACTION_IDLE_MAINTENANCE_END} will be sent. In other words, you
2747 * should not do the maintenance work in
2748 * {@link BroadcastReceiver#onReceive(Context, Intent)}, rather start a
2749 * maintenance service by {@link Context#startService(Intent)}. Also
2750 * you should hold a wake lock while your maintenance service is running
2751 * to prevent the device going to sleep.
2752 * </p>
2753 * <p>
2754 * <p class="note">This is a protected intent that can only be sent by
2755 * the system.
2756 * </p>
2757 *
2758 * @see #ACTION_IDLE_MAINTENANCE_END
2759 *
2760 * @hide
2761 */
2762 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2763 public static final String ACTION_IDLE_MAINTENANCE_START =
2764 "android.intent.action.ACTION_IDLE_MAINTENANCE_START";
2765
2766 /**
2767 * Broadcast Action: A broadcast when idle maintenance should be stopped.
2768 * This means that the user was not interacting with the device as a result
2769 * of which a broadcast with action {@link #ACTION_IDLE_MAINTENANCE_START}
2770 * was sent and now the user started interacting with the device. Typical
2771 * use of the idle maintenance is to perform somehow expensive tasks that
2772 * can be postponed at a moment when they will not degrade user experience.
2773 * <p>
2774 * <p class="note">In order to keep the device responsive in case of an
2775 * unexpected user interaction, implementations of a maintenance task
2776 * should be interruptible. Hence, on receiving a broadcast with this
2777 * action, the maintenance task should be interrupted as soon as possible.
2778 * In other words, you should not do the maintenance work in
2779 * {@link BroadcastReceiver#onReceive(Context, Intent)}, rather stop the
2780 * maintenance service that was started on receiving of
2781 * {@link #ACTION_IDLE_MAINTENANCE_START}.Also you should release the wake
2782 * lock you acquired when your maintenance service started.
2783 * </p>
2784 * <p class="note">This is a protected intent that can only be sent
2785 * by the system.
2786 *
2787 * @see #ACTION_IDLE_MAINTENANCE_START
2788 *
2789 * @hide
2790 */
2791 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2792 public static final String ACTION_IDLE_MAINTENANCE_END =
2793 "android.intent.action.ACTION_IDLE_MAINTENANCE_END";
ACTION_REMOTE_INTENT表明remote intent将会发出
2795 /**
2796 * Broadcast Action: a remote intent is to be broadcasted.
2797 *
2798 * A remote intent is used for remote RPC between devices. The remote intent
2799 * is serialized and sent from one device to another device. The receiving
2800 * device parses the remote intent and broadcasts it. Note that anyone can
2801 * broadcast a remote intent. However, if the intent receiver of the remote intent
2802 * does not trust intent broadcasts from arbitrary intent senders, it should require
2803 * the sender to hold certain permissions so only trusted sender's broadcast will be
2804 * let through.
2805 * @hide
2806 */
2807 public static final String ACTION_REMOTE_INTENT =
2808 "com.google.android.c2dm.intent.RECEIVE";
2809
ACTION_PRE_BOOT_COMPLETED在系统升级重启之后发出
2810 /**
2811 * Broadcast Action: This is broadcast once when the user is booting after a
2812 * system update. It can be used to perform cleanup or upgrades after a
2813 * system update.
2814 * <p>
2815 * This broadcast is sent after the {@link #ACTION_LOCKED_BOOT_COMPLETED}
2816 * broadcast but before the {@link #ACTION_BOOT_COMPLETED} broadcast. It's
2817 * only sent when the {@link Build#FINGERPRINT} has changed, and it's only
2818 * sent to receivers in the system image.
2819 *
2820 * @hide
2821 */
2822 public static final String ACTION_PRE_BOOT_COMPLETED =
2823 "android.intent.action.PRE_BOOT_COMPLETED";
ACTION_GET_RESTRICTION_ENTRIES表明询问app，获取对特定用户做权限限制的条目
2810 /**
2811 * Broadcast Action: This is broadcast once when the user is booting after a
2812 * system update. It can be used to perform cleanup or upgrades after a
2813 * system update.
2814 * <p>
2815 * This broadcast is sent after the {@link #ACTION_LOCKED_BOOT_COMPLETED}
2816 * broadcast but before the {@link #ACTION_BOOT_COMPLETED} broadcast. It's
2817 * only sent when the {@link Build#FINGERPRINT} has changed, and it's only
2818 * sent to receivers in the system image.
2819 *
2820 * @hide
2821 */
2822 public static final String ACTION_PRE_BOOT_COMPLETED =
2823 "android.intent.action.PRE_BOOT_COMPLETED";
ACTION_USER_INITIALIZE表明新用户第一次被启动，通知系统app；ACTION_USER_FOREGROUND表明用户被切换到前台，ACTION_USER_BACKGROUND表明用户被切换到后台；ACTION_USER_ADD表明user被添加进来；ACTION_USER_STARTED表明user被启动了；ACTION_USER_STARTING表明user正在被启动；ACTION_USER_STOPPING表面那个user正在被停止；ACTION_USER_STOPPED表明user被停止了；ACTION_USER_REMOVED表明用户被移除；ACTION_USER_SWITCHED表明user被切换；ACTION_USER_UNLOCKED表明存储分区被解锁；ACTION_USER_INFO_CHANGED表明user信息改变
2842 /**
2843 * Sent the first time a user is starting, to allow system apps to
2844 * perform one time initialization. (This will not be seen by third
2845 * party applications because a newly initialized user does not have any
2846 * third party applications installed for it.) This is sent early in
2847 * starting the user, around the time the home app is started, before
2848 * {@link #ACTION_BOOT_COMPLETED} is sent. This is sent as a foreground
2849 * broadcast, since it is part of a visible user interaction; be as quick
2850 * as possible when handling it.
2851 */
2852 public static final String ACTION_USER_INITIALIZE =
2853 "android.intent.action.USER_INITIALIZE";
2854
2855 /**
2856 * Sent when a user switch is happening, causing the process's user to be
2857 * brought to the foreground. This is only sent to receivers registered
2858 * through {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
2859 * Context.registerReceiver}. It is sent to the user that is going to the
2860 * foreground. This is sent as a foreground
2861 * broadcast, since it is part of a visible user interaction; be as quick
2862 * as possible when handling it.
2863 */
2864 public static final String ACTION_USER_FOREGROUND =
2865 "android.intent.action.USER_FOREGROUND";
2866
2867 /**
2868 * Sent when a user switch is happening, causing the process's user to be
2869 * sent to the background. This is only sent to receivers registered
2870 * through {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
2871 * Context.registerReceiver}. It is sent to the user that is going to the
2872 * background. This is sent as a foreground
2873 * broadcast, since it is part of a visible user interaction; be as quick
2874 * as possible when handling it.
2875 */
2876 public static final String ACTION_USER_BACKGROUND =
2877 "android.intent.action.USER_BACKGROUND";
2878
2879 /**
2880 * Broadcast sent to the system when a user is added. Carries an extra
2881 * EXTRA_USER_HANDLE that has the userHandle of the new user. It is sent to
2882 * all running users. You must hold
2883 * {@link android.Manifest.permission#MANAGE_USERS} to receive this broadcast.
2884 * @hide
2885 */
2886 public static final String ACTION_USER_ADDED =
2887 "android.intent.action.USER_ADDED";
2888
2889 /**
2890 * Broadcast sent by the system when a user is started. Carries an extra
2891 * EXTRA_USER_HANDLE that has the userHandle of the user. This is only sent to
2892 * registered receivers, not manifest receivers. It is sent to the user
2893 * that has been started. This is sent as a foreground
2894 * broadcast, since it is part of a visible user interaction; be as quick
2895 * as possible when handling it.
2896 * @hide
2897 */
2898 public static final String ACTION_USER_STARTED =
2899 "android.intent.action.USER_STARTED";
2900
2901 /**
2902 * Broadcast sent when a user is in the process of starting. Carries an extra
2903 * EXTRA_USER_HANDLE that has the userHandle of the user. This is only
2904 * sent to registered receivers, not manifest receivers. It is sent to all
2905 * users (including the one that is being started). You must hold
2906 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS} to receive
2907 * this broadcast. This is sent as a background broadcast, since
2908 * its result is not part of the primary UX flow; to safely keep track of
2909 * started/stopped state of a user you can use this in conjunction with
2910 * {@link #ACTION_USER_STOPPING}. It is <b>not</b> generally safe to use with
2911 * other user state broadcasts since those are foreground broadcasts so can
2912 * execute in a different order.
2913 * @hide
2914 */
2915 public static final String ACTION_USER_STARTING =
2916 "android.intent.action.USER_STARTING";
2917
2918 /**
2919 * Broadcast sent when a user is going to be stopped. Carries an extra
2920 * EXTRA_USER_HANDLE that has the userHandle of the user. This is only
2921 * sent to registered receivers, not manifest receivers. It is sent to all
2922 * users (including the one that is being stopped). You must hold
2923 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS} to receive
2924 * this broadcast. The user will not stop until all receivers have
2925 * handled the broadcast. This is sent as a background broadcast, since
2926 * its result is not part of the primary UX flow; to safely keep track of
2927 * started/stopped state of a user you can use this in conjunction with
2928 * {@link #ACTION_USER_STARTING}. It is <b>not</b> generally safe to use with
2929 * other user state broadcasts since those are foreground broadcasts so can
2930 * execute in a different order.
2931 * @hide
2932 */
2933 public static final String ACTION_USER_STOPPING =
2934 "android.intent.action.USER_STOPPING";
2935
2936 /**
2937 * Broadcast sent to the system when a user is stopped. Carries an extra
2938 * EXTRA_USER_HANDLE that has the userHandle of the user. This is similar to
2939 * {@link #ACTION_PACKAGE_RESTARTED}, but for an entire user instead of a
2940 * specific package. This is only sent to registered receivers, not manifest
2941 * receivers. It is sent to all running users <em>except</em> the one that
2942 * has just been stopped (which is no longer running).
2943 * @hide
2944 */
2945 public static final String ACTION_USER_STOPPED =
2946 "android.intent.action.USER_STOPPED";
2947
2948 /**
2949 * Broadcast sent to the system when a user is removed. Carries an extra EXTRA_USER_HANDLE that has
2950 * the userHandle of the user. It is sent to all running users except the
2951 * one that has been removed. The user will not be completely removed until all receivers have
2952 * handled the broadcast. You must hold
2953 * {@link android.Manifest.permission#MANAGE_USERS} to receive this broadcast.
2954 * @hide
2955 */
2956 public static final String ACTION_USER_REMOVED =
2957 "android.intent.action.USER_REMOVED";
2958
2959 /**
2960 * Broadcast sent to the system when the user switches. Carries an extra EXTRA_USER_HANDLE that has
2961 * the userHandle of the user to become the current one. This is only sent to
2962 * registered receivers, not manifest receivers. It is sent to all running users.
2963 * You must hold
2964 * {@link android.Manifest.permission#MANAGE_USERS} to receive this broadcast.
2965 * @hide
2966 */
2967 public static final String ACTION_USER_SWITCHED =
2968 "android.intent.action.USER_SWITCHED";
2969
2970 /**
2971 * Broadcast Action: Sent when the credential-encrypted private storage has
2972 * become unlocked for the target user. This is only sent to registered
2973 * receivers, not manifest receivers.
2974 */
2975 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
2976 public static final String ACTION_USER_UNLOCKED = "android.intent.action.USER_UNLOCKED";
2977
2978 /**
2979 * Broadcast sent to the system when a user's information changes. Carries an extra
2980 * {@link #EXTRA_USER_HANDLE} to indicate which user's information changed.
2981 * This is only sent to registered receivers, not manifest receivers. It is sent to all users.
2982 * @hide
2983 */
2984 public static final String ACTION_USER_INFO_CHANGED =
2985 "android.intent.action.USER_INFO_CHANGED";
ACTION_MANAGED_PROFILE_ADDED表明被管理的用户配置被添加；ACTION_MANAGED_PROFILE_REMOVED表明被管理的用户配置被移除；ACTION_MANAGED_PROFILE_UNLOCKED表明相关用户配置的存储分区被解锁；ACTION_MANAGED_PROFILE_AVAILABLE表明相关用户配置可用；ACTION_MANAGED_PROFILE_UNAVAILABLE表明相关用户配置不可用
3019 /**
3020 * Broadcast sent to the primary user when an associated managed profile has become available.
3021 * Currently this includes when the user disables quiet mode for the profile. Carries an extra
3022 * {@link #EXTRA_USER} that specifies the UserHandle of the profile. When quiet mode is changed,
3023 * this broadcast will carry a boolean extra {@link #EXTRA_QUIET_MODE} indicating the new state
3024 * of quiet mode. This is only sent to registered receivers, not manifest receivers.
3025 */
3026 public static final String ACTION_MANAGED_PROFILE_AVAILABLE =
3027 "android.intent.action.MANAGED_PROFILE_AVAILABLE";
3028
3029 /**
3030 * Broadcast sent to the primary user when an associated managed profile has become unavailable.
3031 * Currently this includes when the user enables quiet mode for the profile. Carries an extra
3032 * {@link #EXTRA_USER} that specifies the UserHandle of the profile. When quiet mode is changed,
3033 * this broadcast will carry a boolean extra {@link #EXTRA_QUIET_MODE} indicating the new state
3034 * of quiet mode. This is only sent to registered receivers, not manifest receivers.
3035 */
3036 public static final String ACTION_MANAGED_PROFILE_UNAVAILABLE =
3037 "android.intent.action.MANAGED_PROFILE_UNAVAILABLE";
ACTION_QUICK_CLOCK表明选择了快速clock widget
3039 /**
3040 * Sent when the user taps on the clock widget in the system's "quick settings" area.
3041 */
3042 public static final String ACTION_QUICK_CLOCK =
3043 "android.intent.action.QUICK_CLOCK";
3044
ACTION_SHOW_BRIGHTNESS_DIALOG显示亮度调节对话框
3039 /**
3040 * Sent when the user taps on the clock widget in the system's "quick settings" area.
3041 */
3042 public static final String ACTION_QUICK_CLOCK =
3043 "android.intent.action.QUICK_CLOCK";
3044
ACTION_GLOBAL_BUTTON表明一个全局button被按到
3052 /**
3053 * Broadcast Action: A global button was pressed. Includes a single
3054 * extra field, {@link #EXTRA_KEY_EVENT}, containing the key event that
3055 * caused the broadcast.
3056 * @hide
3057 */
3058 public static final String ACTION_GLOBAL_BUTTON = "android.intent.action.GLOBAL_BUTTON";
ACTION_MEDIA_RESOURCE_GRANTED表明媒体资源被某个package获取到
3060 /**
3061 * Broadcast Action: Sent when media resource is granted.
3062 * <p>
3063 * {@link #EXTRA_PACKAGES} specifies the packages on the process holding the media resource
3064 * granted.
3065 * </p>
3066 * <p class="note">
3067 * This is a protected intent that can only be sent by the system.
3068 * </p>
3069 * <p class="note">
3070 * This requires {@link android.Manifest.permission#RECEIVE_MEDIA_RESOURCE_USAGE} permission.
3071 * </p>
3072 *
3073 * @hide
3074 */
3075 public static final String ACTION_MEDIA_RESOURCE_GRANTED =
3076 "android.intent.action.MEDIA_RESOURCE_GRANTED";
ACTION_OPEN_DOCUMENT表明允许用户选择并获取一个或多个文件;ACTION_CREATE_DOCUMENT表明创建一个文件
3078 /**
3079 * Activity Action: Allow the user to select and return one or more existing
3080 * documents. When invoked, the system will display the various
3081 * {@link DocumentsProvider} instances installed on the device, letting the
3082 * user interactively navigate through them. These documents include local
3083 * media, such as photos and video, and documents provided by installed
3084 * cloud storage providers.
3085 * <p>
3086 * Each document is represented as a {@code content://} URI backed by a
3087 * {@link DocumentsProvider}, which can be opened as a stream with
3088 * {@link ContentResolver#openFileDescriptor(Uri, String)}, or queried for
3089 * {@link android.provider.DocumentsContract.Document} metadata.
3090 * <p>
3091 * All selected documents are returned to the calling application with
3092 * persistable read and write permission grants. If you want to maintain
3093 * access to the documents across device reboots, you need to explicitly
3094 * take the persistable permissions using
3095 * {@link ContentResolver#takePersistableUriPermission(Uri, int)}.
3096 * <p>
3097 * Callers must indicate the acceptable document MIME types through
3098 * {@link #setType(String)}. For example, to select photos, use
3099 * {@code image/*}. If multiple disjoint MIME types are acceptable, define
3100 * them in {@link #EXTRA_MIME_TYPES} and {@link #setType(String)} to
3101 * {@literal *}/*.
3102 * <p>
3103 * If the caller can handle multiple returned items (the user performing
3104 * multiple selection), then you can specify {@link #EXTRA_ALLOW_MULTIPLE}
3105 * to indicate this.
3106 * <p>
3107 * Callers must include {@link #CATEGORY_OPENABLE} in the Intent to obtain
3108 * URIs that can be opened with
3109 * {@link ContentResolver#openFileDescriptor(Uri, String)}.
3110 * <p>
3111 * Output: The URI of the item that was picked, returned in
3112 * {@link #getData()}. This must be a {@code content://} URI so that any
3113 * receiver can access it. If multiple documents were selected, they are
3114 * returned in {@link #getClipData()}.
3115 *
3116 * @see DocumentsContract
3117 * @see #ACTION_OPEN_DOCUMENT_TREE
3118 * @see #ACTION_CREATE_DOCUMENT
3119 * @see #FLAG_GRANT_PERSISTABLE_URI_PERMISSION
3120 */
3121 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
3122 public static final String ACTION_OPEN_DOCUMENT = "android.intent.action.OPEN_DOCUMENT";
3123
3124 /**
3125 * Activity Action: Allow the user to create a new document. When invoked,
3126 * the system will display the various {@link DocumentsProvider} instances
3127 * installed on the device, letting the user navigate through them. The
3128 * returned document may be a newly created document with no content, or it
3129 * may be an existing document with the requested MIME type.
3130 * <p>
3131 * Each document is represented as a {@code content://} URI backed by a
3132 * {@link DocumentsProvider}, which can be opened as a stream with
3133 * {@link ContentResolver#openFileDescriptor(Uri, String)}, or queried for
3134 * {@link android.provider.DocumentsContract.Document} metadata.
3135 * <p>
3136 * Callers must indicate the concrete MIME type of the document being
3137 * created by setting {@link #setType(String)}. This MIME type cannot be
3138 * changed after the document is created.
3139 * <p>
3140 * Callers can provide an initial display name through {@link #EXTRA_TITLE},
3141 * but the user may change this value before creating the file.
3142 * <p>
3143 * Callers must include {@link #CATEGORY_OPENABLE} in the Intent to obtain
3144 * URIs that can be opened with
3145 * {@link ContentResolver#openFileDescriptor(Uri, String)}.
3146 * <p>
3147 * Output: The URI of the item that was created. This must be a
3148 * {@code content://} URI so that any receiver can access it.
3149 *
3150 * @see DocumentsContract
3151 * @see #ACTION_OPEN_DOCUMENT
3152 * @see #ACTION_OPEN_DOCUMENT_TREE
3153 * @see #FLAG_GRANT_PERSISTABLE_URI_PERMISSION
3154 */
3155 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
3156 public static final String ACTION_CREATE_DOCUMENT = "android.intent.action.CREATE_DOCUMENT";
ACTION_OPEN_DOCUMENT_TREE表明开打一个文档子树
3158 /**
3159 * Activity Action: Allow the user to pick a directory subtree. When
3160 * invoked, the system will display the various {@link DocumentsProvider}
3161 * instances installed on the device, letting the user navigate through
3162 * them. Apps can fully manage documents within the returned directory.
3163 * <p>
3164 * To gain access to descendant (child, grandchild, etc) documents, use
3165 * {@link DocumentsContract#buildDocumentUriUsingTree(Uri, String)} and
3166 * {@link DocumentsContract#buildChildDocumentsUriUsingTree(Uri, String)}
3167 * with the returned URI.
3168 * <p>
3169 * Output: The URI representing the selected directory tree.
3170 *
3171 * @see DocumentsContract
3172 */
3173 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
3174 public static final String
3175 ACTION_OPEN_DOCUMENT_TREE = "android.intent.action.OPEN_DOCUMENT_TREE";
ACTION_DYNAMIC_SENSOR_CHANGED表明sensor连接或者断开连接
3177 /**
3178 * Broadcast Action: List of dynamic sensor is changed due to new sensor being connected or
3179 * exisiting sensor being disconnected.
3180 *
3181 * <p class="note">This is a protected intent that can only be sent by the system.</p>
3182 *
3183 * {@hide}
3184 */
3185 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
3186 public static final String
3187 ACTION_DYNAMIC_SENSOR_CHANGED = "android.intent.action.DYNAMIC_SENSOR_CHANGED";
ACTION_MASTER_CLEAR是hide的，不导入sdk里，表明是否做factory reset
3189 /** {@hide} */
3190 public static final String ACTION_MASTER_CLEAR = "android.intent.action.MASTER_CLEAR";
EXTRA_FORCE_MASTER_CLEAR表明是否强制做factory reset
3192 /**
3193 * Boolean intent extra to be used with {@link ACTION_MASTER_CLEAR} in order to force a factory
3194 * reset even if {@link android.os.UserManager.DISALLOW_FACTORY_RESET} is set.
3195 * @hide
3196 */
3197 public static final String EXTRA_FORCE_MASTER_CLEAR =
3198 "android.intent.extra.FORCE_MASTER_CLEAR";
3199
ACTION_SETTING_RESTORED表明一个设置项正从备份里还原，EXTRA_SETTING_NAME表明设置项的名字，EXTRA_SETTING_PREVIOUS_VALUE表明该项以前的值，EXTRA_SETTING_NEW_VALUE表明新的值
3200 /**
3201 * Broadcast action: report that a settings element is being restored from backup. The intent
3202 * contains three extras: EXTRA_SETTING_NAME is a string naming the restored setting,
3203 * EXTRA_SETTING_NEW_VALUE is the value being restored, and EXTRA_SETTING_PREVIOUS_VALUE
3204 * is the value of that settings entry prior to the restore operation. All of these values are
3205 * represented as strings.
3206 *
3207 * <p>This broadcast is sent only for settings provider entries known to require special handling
3208 * around restore time. These entries are found in the BROADCAST_ON_RESTORE table within
3209 * the provider's backup agent implementation.
3210 *
3211 * @see #EXTRA_SETTING_NAME
3212 * @see #EXTRA_SETTING_PREVIOUS_VALUE
3213 * @see #EXTRA_SETTING_NEW_VALUE
3214 * {@hide}
3215 */
3216 public static final String ACTION_SETTING_RESTORED = "android.os.action.SETTING_RESTORED";
3217
3218 /** {@hide} */
3219 public static final String EXTRA_SETTING_NAME = "setting_name";
3220 /** {@hide} */
3221 public static final String EXTRA_SETTING_PREVIOUS_VALUE = "previous_value";
3222 /** {@hide} */
3223 public static final String EXTRA_SETTING_NEW_VALUE = "new_value";
ACTION_PROCESS表明处理一个文本；EXTRA_PROCESS_TEXT是要处理的text，EXTRA_PROCESS_TEXT_READONLY表明返回的处理过的text是否是只读的
3225 /**
3226 * Activity Action: Process a piece of text.
3227 * <p>Input: {@link #EXTRA_PROCESS_TEXT} contains the text to be processed.
3228 * {@link #EXTRA_PROCESS_TEXT_READONLY} states if the resulting text will be read-only.</p>
3229 * <p>Output: {@link #EXTRA_PROCESS_TEXT} contains the processed text.</p>
3230 */
3231 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
3232 public static final String ACTION_PROCESS_TEXT = "android.intent.action.PROCESS_TEXT";
3233 /**
3234 * The name of the extra used to define the text to be processed, as a
3235 * CharSequence. Note that this may be a styled CharSequence, so you must use
3236 * {@link Bundle#getCharSequence(String) Bundle.getCharSequence()} to retrieve it.
3237 */
3238 public static final String EXTRA_PROCESS_TEXT = "android.intent.extra.PROCESS_TEXT";
3239 /**
3240 * The name of the boolean extra used to define if the processed text will be used as read-only.
3241 */
3242 public static final String EXTRA_PROCESS_TEXT_READONLY =
ACTION_THERMAL_EVENT表明达到了某个温度的事件发生；EXTRA_THERMAL_STATE是温度的状态，是EXTRA_THERMAL_STATE_NORMAL，EXTRA_THERMAL_STATE_WARNING，EXTRA_THERMAL_STATE_EXCEEDED中的一个
3245 /**
3246 * Broadcast action: reports when a new thermal event has been reached. When the device
3247 * is reaching its maximum temperatue, the thermal level reported
3248 * {@hide}
3249 */
3250 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
3251 public static final String ACTION_THERMAL_EVENT = "android.intent.action.THERMAL_EVENT";
3252
3253 /** {@hide} */
3254 public static final String EXTRA_THERMAL_STATE = "android.intent.extra.THERMAL_STATE";
3255
3256 /**
3257 * Thermal state when the device is normal. This state is sent in the
3258 * {@link #ACTION_THERMAL_EVENT} broadcast as {@link #EXTRA_THERMAL_STATE}.
3259 * {@hide}
3260 */
3261 public static final int EXTRA_THERMAL_STATE_NORMAL = 0;
3262
3263 /**
3264 * Thermal state where the device is approaching its maximum threshold. This state is sent in
3265 * the {@link #ACTION_THERMAL_EVENT} broadcast as {@link #EXTRA_THERMAL_STATE}.
3266 * {@hide}
3267 */
3268 public static final int EXTRA_THERMAL_STATE_WARNING = 1;
3269
3270 /**
3271 * Thermal state where the device has reached its maximum threshold. This state is sent in the
3272 * {@link #ACTION_THERMAL_EVENT} broadcast as {@link #EXTRA_THERMAL_STATE}.
3273 * {@hide}
3274 */
3275 public static final int EXTRA_THERMAL_STATE_EXCEEDED = 2;
下面开始讲Intent category
CATEGORY_DEFAULT表明是否该activity应该成为操作数据动作的默认操作者，如果其他activity没有设置这个，那么将对用户展示设置了这个的activity
3278 // ---------------------------------------------------------------------
3279 // ---------------------------------------------------------------------
3280 // Standard intent categories (see addCategory()).
3281
3282 /**
3283 * Set if the activity should be an option for the default action
3284 * (center press) to perform on a piece of data. Setting this will
3285 * hide from the user any activities without it set when performing an
3286 * action on some data. Note that this is normally -not- set in the
3287 * Intent when initiating an action -- it is for use in intent filters
3288 * specified in packages.
3289 */
3290 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3291 public static final String CATEGORY_DEFAULT = "android.intent.category.DEFAULT";
CATEGORY_BROWSABLE表明Activity可以被浏览器调用
3292 /**
3293 * Activities that can be safely invoked from a browser must support this
3294 * category. For example, if the user is viewing a web page or an e-mail
3295 * and clicks on a link in the text, the Intent generated execute that
3296 * link will require the BROWSABLE category, so that only activities
3297 * supporting this category will be considered as possible actions. By
3298 * supporting this category, you are promising that there is nothing
3299 * damaging (without user intervention) that can happen by invoking any
3300 * matching Intent.
3301 */
3302 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3303 public static final String CATEGORY_BROWSABLE = "android.intent.category.BROWSABLE";
CATEGORY_VOICE表明Activity会参与语音交互
3304 /**
3305 * Categories for activities that can participate in voice interaction.
3306 * An activity that supports this category must be prepared to run with
3307 * no UI shown at all (though in some case it may have a UI shown), and
3308 * rely on {@link android.app.VoiceInteractor} to interact with the user.
3309 */
3310 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3311 public static final String CATEGORY_VOICE = "android.intent.category.VOICE";
CATEGORY_ALTERNATIVE表明Activity是正在view的data的一个可替换选项
3312 /**
3313 * Set if the activity should be considered as an alternative action to
3314 * the data the user is currently viewing. See also
3315 * {@link #CATEGORY_SELECTED_ALTERNATIVE} for an alternative action that
3316 * applies to the selection in a list of items.
3317 *
3318 * <p>Supporting this category means that you would like your activity to be
3319 * displayed in the set of alternative things the user can do, usually as
3320 * part of the current activity's options menu. You will usually want to
3321 * include a specific label in the <intent-filter> of this action
3322 * describing to the user what it does.
3323 *
3324 * <p>The action of IntentFilter with this category is important in that it
3325 * describes the specific action the target will perform. This generally
3326 * should not be a generic action (such as {@link #ACTION_VIEW}, but rather
3327 * a specific name such as "com.android.camera.action.CROP. Only one
3328 * alternative of any particular action will be shown to the user, so using
3329 * a specific action like this makes sure that your alternative will be
3330 * displayed while also allowing other applications to provide their own
3331 * overrides of that particular action.
3332 */
3333 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3334 public static final String CATEGORY_ALTERNATIVE = "android.intent.category.ALTERNATIVE";
CATEGORY_SELECTED_ALTERNATIVE表明被选中的数据的可替代选择操作
3335 /**
3336 * Set if the activity should be considered as an alternative selection
3337 * action to the data the user has currently selected. This is like
3338 * {@link #CATEGORY_ALTERNATIVE}, but is used in activities showing a list
3339 * of items from which the user can select, giving them alternatives to the
3340 * default action that will be performed on it.
3341 */
3342 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3343 public static final String CATEGORY_SELECTED_ALTERNATIVE = "android.intent.category.SELECTED_ALTERNATIVE";
CATEGORY_TAB表明Activityi做为一个Tab被包含在TabActivity里
3344 /**
3345 * Intended to be used as a tab inside of a containing TabActivity.
3346 */
3347 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3348 public static final String CATEGORY_TAB = "android.intent.category.TAB";
CATEGORY_LAUNCHER表明Activity应该显示在launcher界面
3349 /**
3350 * Should be displayed in the top-level launcher.
3351 */
3352 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3353 public static final String CATEGORY_LAUNCHER = "android.intent.category.LAUNCHER";
CATEGORY_LEANBACK_LAUNCHER表明Activity显示在Leanback launcher界面
3354 /**
3355 * Indicates an activity optimized for Leanback mode, and that should
3356 * be displayed in the Leanback launcher.
3357 */
3358 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3359 public static final String CATEGORY_LEANBACK_LAUNCHER = "android.intent.category.LEANBACK_LAUNCHER";
CATEGORY_LEANBACK_SETTINGS表明Activity为leanback settings activity
3360 /**
3361 * Indicates a Leanback settings activity to be displayed in the Leanback launcher.
3362 * @hide
3363 */
3364 @SystemApi
3365 public static final String CATEGORY_LEANBACK_SETTINGS = "android.intent.category.LEANBACK_SETTINGS";
CATEGORY_INFO表明包含package info的Activity
3366 /**
3367 * Provides information about the package it is in; typically used if
3368 * a package does not contain a {@link #CATEGORY_LAUNCHER} to provide
3369 * a front-door to the user without having to be shown in the all apps list.
3370 */
3371 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3372 public static final String CATEGORY_INFO = "android.intent.category.INFO";
CATEGORY_HOME表明为home Activty，在第一次启动的时候显示，即欢迎启动界面
3373 /**
3374 * This is the home activity, that is the first activity that is displayed
3375 * when the device boots.
3376 */
3377 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3378 public static final String CATEGORY_HOME = "android.intent.category.HOME";
CATEGORY_HOME_MAIN表明Activity在设备做完设置后显示
3379 /**
3380 * This is the home activity that is displayed when the device is finished setting up and ready
3381 * for use.
3382 * @hide
3383 */
3384 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3385 public static final String CATEGORY_HOME_MAIN = "android.intent.category.HOME_MAIN";
CATEGORY_SETUP_WIZARD表明为设置向导Activity
3386 /**
3387 * This is the setup wizard activity, that is the first activity that is displayed
3388 * when the user sets up the device for the first time.
3389 * @hide
3390 */
3391 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3392 public static final String CATEGORY_SETUP_WIZARD = "android.intent.category.SETUP_WIZARD";
CATEGORY_PREFERENCE表明该Activity为偏好面板
3393 /**
3394 * This activity is a preference panel.
3395 */
3396 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3397 public static final String CATEGORY_PREFERENCE = "android.intent.category.PREFERENCE";
CATEGORY_DEVELOPMENT_PREFERENCE表明该Activity为开发偏好面板
3398 /**
3399 * This activity is a development preference panel.
3400 */
3401 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3402 public static final String CATEGORY_DEVELOPMENT_PREFERENCE = "android.intent.category.DEVELOPMENT_PREFERENCE";
3403 /**
CATEGORY_EMBED表明该Activity可以嵌进父Activity里
3403 /**
3404 * Capable of running inside a parent activity container.
3405 */
3406 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3407 public static final String CATEGORY_EMBED = "android.intent.category.EMBED";
CATEGORY_APP_MARKET表明该Activity可以浏览和下载应用程序
3408 /**
3409 * This activity allows the user to browse and download new applications.
3410 */
3411 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3412 public static final String CATEGORY_APP_MARKET = "android.intent.category.APP_MARKET";
CATEGORY_MONKEY表明该Activity可以被Monkey或者其他自动测试工具使用
3413 /**
3414 * This activity may be exercised by the monkey or other automated test tools.
3415 */
3416 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3417 public static final String CATEGORY_MONKEY = "android.intent.category.MONKEY";
CATEGORY_TEST表明该Activity仅仅是做测试用
3418 /**
3419 * To be used as a test (not part of the normal user experience).
3420 */
3421 public static final String CATEGORY_TEST = "android.intent.category.TEST";
CATEGORY_UNIT_TEST表明Activity用来做单元测试
3422 /**
3423 * To be used as a unit test (run through the Test Harness).
3424 */
3425 public static final String CATEGORY_UNIT_TEST = "android.intent.category.UNIT_TEST";
CATEGORY_SAMPLE_CODE表明Activity用来做例子
3426 /**
3427 * To be used as a sample code example (not part of the normal user
3428 * experience).
3429 */
3430 public static final String CATEGORY_SAMPLE_CODE = "android.intent.category.SAMPLE_CODE";
CATEGORY_OPENABLE表明数据的URI可以用ContentResolver#OpenFileDescriptor来处理
3432 /**
3433 * Used to indicate that an intent only wants URIs that can be opened with
3434 * {@link ContentResolver#openFileDescriptor(Uri, String)}. Openable URIs
3435 * must support at least the columns defined in {@link OpenableColumns} when
3436 * queried.
3437 *
3438 * @see #ACTION_GET_CONTENT
3439 * @see #ACTION_OPEN_DOCUMENT
3440 * @see #ACTION_CREATE_DOCUMENT
3441 */
3442 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3443 public static final String CATEGORY_OPENABLE = "android.intent.category.OPENABLE";
CATEGORY_FRAMEWORK_INSTRUMENTATION_TEST表明Activity做framework instrumentation测试
3445 /**
3446 * To be used as code under test for framework instrumentation tests.
3447 */
3448 public static final String CATEGORY_FRAMEWORK_INSTRUMENTATION_TEST =
3449 "android.intent.category.FRAMEWORK_INSTRUMENTATION_TEST";
CATEGORY_CAR_DOCK表明Activity用于汽车docker；CATEGORY_DESK_DOCKER表明用于桌面docker；CATEGORY_LE_DESK_DOCKER表明用于low end桌面docker；CATEGORY_HE_DESK_DOCKER表明用于high end桌面docker;CATEGORY_CAR_MODE表明是在car模式下
3450 /**
3451 * An activity to run when device is inserted into a car dock.
3452 * Used with {@link #ACTION_MAIN} to launch an activity. For more
3453 * information, see {@link android.app.UiModeManager}.
3454 */
3455 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3456 public static final String CATEGORY_CAR_DOCK = "android.intent.category.CAR_DOCK";
3457 /**
3458 * An activity to run when device is inserted into a car dock.
3459 * Used with {@link #ACTION_MAIN} to launch an activity. For more
3460 * information, see {@link android.app.UiModeManager}.
3461 */
3462 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3463 public static final String CATEGORY_DESK_DOCK = "android.intent.category.DESK_DOCK";
3464 /**
3465 * An activity to run when device is inserted into a analog (low end) dock.
3466 * Used with {@link #ACTION_MAIN} to launch an activity. For more
3467 * information, see {@link android.app.UiModeManager}.
3468 */
3469 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3470 public static final String CATEGORY_LE_DESK_DOCK = "android.intent.category.LE_DESK_DOCK";
3471
3472 /**
3473 * An activity to run when device is inserted into a digital (high end) dock.
3474 * Used with {@link #ACTION_MAIN} to launch an activity. For more
3475 * information, see {@link android.app.UiModeManager}.
3476 */
3477 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3478 public static final String CATEGORY_HE_DESK_DOCK = "android.intent.category.HE_DESK_DOCK";
3479
3480 /**
3481 * Used to indicate that the activity can be used in a car environment.
3482 */
3483 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3484 public static final String CATEGORY_CAR_MODE = "android.intent.category.CAR_MODE";
CATEGORY_APP_BROWSER表明启动一个浏览器；CATEGORY_APP_CALCULATOR表明启动一个计算器；CATEGORY_APP_CALENDAR表明启动一个日历；CATEGORY_APP_CONTACTS表明启动一个联系人；CATEGORY_APP_EMAIL启动电子邮件；CATEGORY_APP_GALLEY启动相册；CATEGORY_APP_MAPS表明启动地图；CATEGORY_APP_MESSAGING表明启动短信；CATEGORY_APP_MUSIC表明启动音乐播放器
3486 // ---------------------------------------------------------------------
3487 // ---------------------------------------------------------------------
3488 // Application launch intent categories (see addCategory()).
3489
3490 /**
3491 * Used with {@link #ACTION_MAIN} to launch the browser application.
3492 * The activity should be able to browse the Internet.
3493 * <p>NOTE: This should not be used as the primary key of an Intent,
3494 * since it will not result in the app launching with the correct
3495 * action and category. Instead, use this with
3496 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3497 * Intent with this category in the selector.</p>
3498 */
3499 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3500 public static final String CATEGORY_APP_BROWSER = "android.intent.category.APP_BROWSER";
3501
3502 /**
3503 * Used with {@link #ACTION_MAIN} to launch the calculator application.
3504 * The activity should be able to perform standard arithmetic operations.
3505 * <p>NOTE: This should not be used as the primary key of an Intent,
3506 * since it will not result in the app launching with the correct
3507 * action and category. Instead, use this with
3508 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3509 * Intent with this category in the selector.</p>
3510 */
3511 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3512 public static final String CATEGORY_APP_CALCULATOR = "android.intent.category.APP_CALCULATOR";
3513
3514 /**
3515 * Used with {@link #ACTION_MAIN} to launch the calendar application.
3516 * The activity should be able to view and manipulate calendar entries.
3517 * <p>NOTE: This should not be used as the primary key of an Intent,
3518 * since it will not result in the app launching with the correct
3519 * action and category. Instead, use this with
3520 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3521 * Intent with this category in the selector.</p>
3522 */
3523 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3524 public static final String CATEGORY_APP_CALENDAR = "android.intent.category.APP_CALENDAR";
3525
3526 /**
3527 * Used with {@link #ACTION_MAIN} to launch the contacts application.
3528 * The activity should be able to view and manipulate address book entries.
3529 * <p>NOTE: This should not be used as the primary key of an Intent,
3530 * since it will not result in the app launching with the correct
3531 * action and category. Instead, use this with
3532 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3533 * Intent with this category in the selector.</p>
3534 */
3535 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3536 public static final String CATEGORY_APP_CONTACTS = "android.intent.category.APP_CONTACTS";
3537
3538 /**
3539 * Used with {@link #ACTION_MAIN} to launch the email application.
3540 * The activity should be able to send and receive email.
3541 * <p>NOTE: This should not be used as the primary key of an Intent,
3542 * since it will not result in the app launching with the correct
3543 * action and category. Instead, use this with
3544 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3545 * Intent with this category in the selector.</p>
3546 */
3547 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3548 public static final String CATEGORY_APP_EMAIL = "android.intent.category.APP_EMAIL";
3549
3550 /**
3551 * Used with {@link #ACTION_MAIN} to launch the gallery application.
3552 * The activity should be able to view and manipulate image and video files
3553 * stored on the device.
3554 * <p>NOTE: This should not be used as the primary key of an Intent,
3555 * since it will not result in the app launching with the correct
3556 * action and category. Instead, use this with
3557 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3558 * Intent with this category in the selector.</p>
3559 */
3560 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3561 public static final String CATEGORY_APP_GALLERY = "android.intent.category.APP_GALLERY";
3562
3563 /**
3564 * Used with {@link #ACTION_MAIN} to launch the maps application.
3565 * The activity should be able to show the user's current location and surroundings.
3566 * <p>NOTE: This should not be used as the primary key of an Intent,
3567 * since it will not result in the app launching with the correct
3568 * action and category. Instead, use this with
3569 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3570 * Intent with this category in the selector.</p>
3571 */
3572 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3573 public static final String CATEGORY_APP_MAPS = "android.intent.category.APP_MAPS";
3574
3575 /**
3576 * Used with {@link #ACTION_MAIN} to launch the messaging application.
3577 * The activity should be able to send and receive text messages.
3578 * <p>NOTE: This should not be used as the primary key of an Intent,
3579 * since it will not result in the app launching with the correct
3580 * action and category. Instead, use this with
3581 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3582 * Intent with this category in the selector.</p>
3583 */
3584 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3585 public static final String CATEGORY_APP_MESSAGING = "android.intent.category.APP_MESSAGING";
3586
3587 /**
3588 * Used with {@link #ACTION_MAIN} to launch the music application.
3589 * The activity should be able to play, browse, or manipulate music files
3590 * stored on the device.
3591 * <p>NOTE: This should not be used as the primary key of an Intent,
3592 * since it will not result in the app launching with the correct
3593 * action and category. Instead, use this with
3594 * {@link #makeMainSelectorActivity(String, String)} to generate a main
3595 * Intent with this category in the selector.</p>
3596 */
3597 @SdkConstant(SdkConstantType.INTENT_CATEGORY)
3598 public static final String CATEGORY_APP_MUSIC = "android.intent.category.APP_MUSIC";
下面为标准的extra 数据key
EXTRA_TEMPLATE表明要创建记录的初始值，用在ACTION_INSERT
3600 // ---------------------------------------------------------------------
3601 // ---------------------------------------------------------------------
3602 // Standard extra data keys.
3603
3604 /**
3605 * The initial data to place in a newly created record. Use with
3606 * {@link #ACTION_INSERT}. The data here is a Map containing the same
3607 * fields as would be given to the underlying ContentProvider.insert()
3608 * call.
3609 */
3610 public static final String EXTRA_TEMPLATE = "android.intent.extra.TEMPLATE";
EXTRA_TEXT和ACTION_SEND一起用，表明要发送的字符串
3612 /**
3613 * A constant CharSequence that is associated with the Intent, used with
3614 * {@link #ACTION_SEND} to supply the literal data to be sent. Note that
3615 * this may be a styled CharSequence, so you must use
3616 * {@link Bundle#getCharSequence(String) Bundle.getCharSequence()} to
3617 * retrieve it.
3618 */
3619 public static final String EXTRA_TEXT = "android.intent.extra.TEXT";
EXTRA_HTML_TEXT和ACTION_SEND一起用，表明要发表的html字符串
3621 /**
3622 * A constant String that is associated with the Intent, used with
3623 * {@link #ACTION_SEND} to supply an alternative to {@link #EXTRA_TEXT}
3624 * as HTML formatted text. Note that you <em>must</em> also supply
3625 * {@link #EXTRA_TEXT}.
3626 */
3627 public static final String EXTRA_HTML_TEXT = "android.intent.extra.HTML_TEXT";
EXTRA_STREAM表明要发送的流数据URI
3629 /**
3630 * A content: URI holding a stream of data associated with the Intent,
3631 * used with {@link #ACTION_SEND} to supply the data being sent.
3632 */
3633 public static final String EXTRA_STREAM = "android.intent.extra.STREAM";
EXTRA_EMAIL表明要发送的email的地址
3635 /**
3636 * A String[] holding e-mail addresses that should be delivered to.
3637 */
3638 public static final String EXTRA_EMAIL = "android.intent.extra.EMAIL";
EXTRA_CC表明email cc的地址
3640 /**
3641 * A String[] holding e-mail addresses that should be carbon copied.
3642 */
3643 public static final String EXTRA_CC = "android.intent.extra.CC";
EXTRA_BCC表明email bcc的地址
3645 /**
3646 * A String[] holding e-mail addresses that should be blind carbon copied.
3647 */
3648 public static final String EXTRA_BCC = "android.intent.extra.BCC";
EXTRA_SUBJECT表明email的主题
3650 /**
3651 * A constant string holding the desired subject line of a message.
3652 */
3653 public static final String EXTRA_SUBJECT = "android.intent.extra.SUBJECT";
EXTRA_INTENT包含Intent的表述字符
3655 /**
3656 * An Intent describing the choices you would like shown with
3657 * {@link #ACTION_PICK_ACTIVITY} or {@link #ACTION_CHOOSER}.
3658 */
3659 public static final String EXTRA_INTENT = "android.intent.extra.INTENT";
EXTRA_USER_ID表明要用的user id
3661 /**
3662 * An int representing the user id to be used.
3663 *
3664 * @hide
3665 */
3666 public static final String EXTRA_USER_ID = "android.intent.extra.USER_ID";
EXTRA_TASK_ID表明要用的task id
3668 /**
3669 * An int representing the task id to be retrieved. This is used when a launch from recents is
3670 * intercepted by another action such as credentials confirmation to remember which task should
3671 * be resumed when complete.
3672 *
3673 * @hide
3674 */
3675 public static final String EXTRA_TASK_ID = "android.intent.extra.TASK_ID";
3676
EXTRA_ALTERNATIVE_INTENTS表明ACTION_CHOOSER将要展示的可选择Intent
3677 /**
3678 * An Intent[] describing additional, alternate choices you would like shown with
3679 * {@link #ACTION_CHOOSER}.
3680 *
3681 * <p>An app may be capable of providing several different payload types to complete a
3682 * user's intended action. For example, an app invoking {@link #ACTION_SEND} to share photos
3683 * with another app may use EXTRA_ALTERNATE_INTENTS to have the chooser transparently offer
3684 * several different supported sending mechanisms for sharing, such as the actual "image/*"
3685 * photo data or a hosted link where the photos can be viewed.</p>
3686 *
3687 * <p>The intent present in {@link #EXTRA_INTENT} will be treated as the
3688 * first/primary/preferred intent in the set. Additional intents specified in
3689 * this extra are ordered; by default intents that appear earlier in the array will be
3690 * preferred over intents that appear later in the array as matches for the same
3691 * target component. To alter this preference, a calling app may also supply
3692 * {@link #EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER}.</p>
3693 */
3694 public static final String EXTRA_ALTERNATE_INTENTS = "android.intent.extra.ALTERNATE_INTENTS";
EXTRA_EXCLUDE_COMPONENTS表明要排除给用户的组件名称。
3696 /**
3697 * A {@link ComponentName ComponentName[]} describing components that should be filtered out
3698 * and omitted from a list of components presented to the user.
3699 *
3700 * <p>When used with {@link #ACTION_CHOOSER}, the chooser will omit any of the components
3701 * in this array if it otherwise would have shown them. Useful for omitting specific targets
3702 * from your own package or other apps from your organization if the idea of sending to those
3703 * targets would be redundant with other app functionality. Filtered components will not
3704 * be able to present targets from an associated <code>ChooserTargetService</code>.</p>
3705 */
3706 public static final String EXTRA_EXCLUDE_COMPONENTS
3707 = "android.intent.extra.EXCLUDE_COMPONENTS";
EXTRA_CHOOSER_TARGETS表明ACTION_CHOOSER要用的ChooserTarget，位置靠前
3709 /**
3710 * A {@link android.service.chooser.ChooserTarget ChooserTarget[]} for {@link #ACTION_CHOOSER}
3711 * describing additional high-priority deep-link targets for the chooser to present to the user.
3712 *
3713 * <p>Targets provided in this way will be presented inline with all other targets provided
3714 * by services from other apps. They will be prioritized before other service targets, but
3715 * after those targets provided by sources that the user has manually pinned to the front.</p>
3716 *
3717 * @see #ACTION_CHOOSER
3718 */
3719 public static final String EXTRA_CHOOSER_TARGETS = "android.intent.extra.CHOOSER_TARGETS";
EXTRA_REFINEMENT_INTENT_SENDER表明要启动的Activity的IntentSender，在ACTION_CHOOSER里做出选择后发出。
3721 /**
3722 * An {@link IntentSender} for an Activity that will be invoked when the user makes a selection
3723 * from the chooser activity presented by {@link #ACTION_CHOOSER}.
3724 *
3725 * <p>An app preparing an action for another app to complete may wish to allow the user to
3726 * disambiguate between several options for completing the action based on the chosen target
3727 * or otherwise refine the action before it is invoked.
3728 * </p>
3729 *
3730 * <p>When sent, this IntentSender may be filled in with the following extras:</p>
3731 * <ul>
3732 * <li>{@link #EXTRA_INTENT} The first intent that matched the user's chosen target</li>
3733 * <li>{@link #EXTRA_ALTERNATE_INTENTS} Any additional intents that also matched the user's
3734 * chosen target beyond the first</li>
3735 * <li>{@link #EXTRA_RESULT_RECEIVER} A {@link ResultReceiver} that the refinement activity
3736 * should fill in and send once the disambiguation is complete</li>
3737 * </ul>
3738 */
3739 public static final String EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER
3740 = "android.intent.extra.CHOOSER_REFINEMENT_INTENT_SENDER";
EXTRA_RESULT_RECEIVER用来返回结果
3742 /**
3743 * A {@link ResultReceiver} used to return data back to the sender.
3744 *
3745 * <p>Used to complete an app-specific
3746 * {@link #EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER refinement} for {@link #ACTION_CHOOSER}.</p>
3747 *
3748 * <p>If {@link #EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER} is present in the intent
3749 * used to start a {@link #ACTION_CHOOSER} activity this extra will be
3750 * {@link #fillIn(Intent, int) filled in} to that {@link IntentSender} and sent
3751 * when the user selects a target component from the chooser. It is up to the recipient
3752 * to send a result to this ResultReceiver to signal that disambiguation is complete
3753 * and that the chooser should invoke the user's choice.</p>
3754 *
3755 * <p>The disambiguator should provide a Bundle to the ResultReceiver with an intent
3756 * assigned to the key {@link #EXTRA_INTENT}. This supplied intent will be used by the chooser
3757 * to match and fill in the final Intent or ChooserTarget before starting it.
3758 * The supplied intent must {@link #filterEquals(Intent) match} one of the intents from
3759 * {@link #EXTRA_INTENT} or {@link #EXTRA_ALTERNATE_INTENTS} passed to
3760 * {@link #EXTRA_CHOOSER_REFINEMENT_INTENT_SENDER} to be accepted.</p>
3761 *
3762 * <p>The result code passed to the ResultReceiver should be
3763 * {@link android.app.Activity#RESULT_OK} if the refinement succeeded and the supplied intent's
3764 * target in the chooser should be started, or {@link android.app.Activity#RESULT_CANCELED} if
3765 * the chooser should finish without starting a target.</p>
3766 */
3767 public static final String EXTRA_RESULT_RECEIVER
3768 = "android.intent.extra.RESULT_RECEIVER";
EXTRA_TITLE表明选择对话框的标题
3770 /**
3771 * A CharSequence dialog title to provide to the user when used with a
3772 * {@link #ACTION_CHOOSER}.
3773 */
3774 public static final String EXTRA_TITLE = "android.intent.extra.TITLE";
EXTRA_INITIAL_INTENTS表明ACTION_CHOOSER初始化的Intents
3776 /**
3777 * A Parcelable[] of {@link Intent} or
3778 * {@link android.content.pm.LabeledIntent} objects as set with
3779 * {@link #putExtra(String, Parcelable[])} of additional activities to place
3780 * a the front of the list of choices, when shown to the user with a
3781 * {@link #ACTION_CHOOSER}.
3782 */
3783 public static final String EXTRA_INITIAL_INTENTS = "android.intent.extra.INITIAL_INTENTS";
EXTRA_EPHEMERAL_SUCCESS表示ephemeral安装成功；EXTRA_EPHEMERAL_FAILURE表示ephemeral安装失败
3785 /**
3786 * A {@link IntentSender} to start after ephemeral installation success.
3787 * @hide
3788 */
3789 public static final String EXTRA_EPHEMERAL_SUCCESS = "android.intent.extra.EPHEMERAL_SUCCESS";
3790
3791 /**
3792 * A {@link IntentSender} to start after ephemeral installation failure.
3793 * @hide
3794 */
3795 public static final String EXTRA_EPHEMERAL_FAILURE = "android.intent.extra.EPHEMERAL_FAILURE";
EXTRA_REPLACEMENT_EXTRAS用来给不同的包添加额外的参数
3797 /**
3798 * A Bundle forming a mapping of potential target package names to different extras Bundles
3799 * to add to the default intent extras in {@link #EXTRA_INTENT} when used with
3800 * {@link #ACTION_CHOOSER}. Each key should be a package name. The package need not
3801 * be currently installed on the device.
3802 *
3803 * <p>An application may choose to provide alternate extras for the case where a user
3804 * selects an activity from a predetermined set of target packages. If the activity
3805 * the user selects from the chooser belongs to a package with its package name as
3806 * a key in this bundle, the corresponding extras for that package will be merged with
3807 * the extras already present in the intent at {@link #EXTRA_INTENT}. If a replacement
3808 * extra has the same key as an extra already present in the intent it will overwrite
3809 * the extra from the intent.</p>
3810 *
3811 * <p><em>Examples:</em>
3812 * <ul>
3813 * <li>An application may offer different {@link #EXTRA_TEXT} to an application
3814 * when sharing with it via {@link #ACTION_SEND}, augmenting a link with additional query
3815 * parameters for that target.</li>
3816 * <li>An application may offer additional metadata for known targets of a given intent
3817 * to pass along information only relevant to that target such as account or content
3818 * identifiers already known to that application.</li>
3819 * </ul></p>
3820 */
3821 public static final String EXTRA_REPLACEMENT_EXTRAS =
3822 "android.intent.extra.REPLACEMENT_EXTRAS";
EXTRA_CHOSEN_COMPONENT_INTENT_SENDER用来在选中的Activity中发送回调；EXTRA_CHOSEN_COMPONENT表明选中组件的名字
3824 /**
3825 * An {@link IntentSender} that will be notified if a user successfully chooses a target
3826 * component to handle an action in an {@link #ACTION_CHOOSER} activity. The IntentSender
3827 * will have the extra {@link #EXTRA_CHOSEN_COMPONENT} appended to it containing the
3828 * {@link ComponentName} of the chosen component.
3829 *
3830 * <p>In some situations this callback may never come, for example if the user abandons
3831 * the chooser, switches to another task or any number of other reasons. Apps should not
3832 * be written assuming that this callback will always occur.</p>
3833 */
3834 public static final String EXTRA_CHOSEN_COMPONENT_INTENT_SENDER =
3835 "android.intent.extra.CHOSEN_COMPONENT_INTENT_SENDER";
3836
3837 /**
3838 * The {@link ComponentName} chosen by the user to complete an action.
3839 *
3840 * @see #EXTRA_CHOSEN_COMPONENT_INTENT_SENDER
3841 */
3842 public static final String EXTRA_CHOSEN_COMPONENT = "android.intent.extra.CHOSEN_COMPONENT";
3843
EXTRA_KEY_EVENT用来包含触发Intent的事件；EXTRA_KEY_CONFIRM为真表明要用户点击确定按钮；EXTRA_USER_REQUESTED_SHUTDOWN表明是否是用户触发的shutdown
3844 /**
3845 * A {@link android.view.KeyEvent} object containing the event that
3846 * triggered the creation of the Intent it is in.
3847 */
3848 public static final String EXTRA_KEY_EVENT = "android.intent.extra.KEY_EVENT";
3849
3850 /**
3851 * Set to true in {@link #ACTION_REQUEST_SHUTDOWN} to request confirmation from the user
3852 * before shutting down.
3853 *
3854 * {@hide}
3855 */
3856 public static final String EXTRA_KEY_CONFIRM = "android.intent.extra.KEY_CONFIRM";
3857
3858 /**
3859 * Set to true in {@link #ACTION_REQUEST_SHUTDOWN} to indicate that the shutdown is
3860 * requested by the user.
3861 *
3862 * {@hide}
3863 */
3864 public static final String EXTRA_USER_REQUESTED_SHUTDOWN =
3865 "android.intent.extra.USER_REQUESTED_SHUTDOWN";
EXTRA_DONT_KILL_APP指示是否在删除包的时候杀掉app
3867 /**
3868 * Used as a boolean extra field in {@link android.content.Intent#ACTION_PACKAGE_REMOVED} or
3869 * {@link android.content.Intent#ACTION_PACKAGE_CHANGED} intents to override the default action
3870 * of restarting the application.
3871 */
3872 public static final String EXTRA_DONT_KILL_APP = "android.intent.extra.DONT_KILL_APP";
EXTRA_PHONE_NUMBER表明电话号码
3874 /**
3875 * A String holding the phone number originally entered in
3876 * {@link android.content.Intent#ACTION_NEW_OUTGOING_CALL}, or the actual
3877 * number to call in a {@link android.content.Intent#ACTION_CALL}.
3878 */
3879 public static final String EXTRA_PHONE_NUMBER = "android.intent.extra.PHONE_NUMBER";
EXTRA_UID表明包的UID
3881 /**
3882 * Used as an int extra field in {@link android.content.Intent#ACTION_UID_REMOVED}
3883 * intents to supply the uid the package had been assigned. Also an optional
3884 * extra in {@link android.content.Intent#ACTION_PACKAGE_REMOVED} or
3885 * {@link android.content.Intent#ACTION_PACKAGE_CHANGED} for the same
3886 * purpose.
3887 */
3888 public static final String EXTRA_UID = "android.intent.extra.UID";
3889
EXTRA_DATA_REMOVED指示是否要删除包的数据
3896 /**
3897 * Used as a boolean extra field in {@link android.content.Intent#ACTION_PACKAGE_REMOVED}
3898 * intents to indicate whether this represents a full uninstall (removing
3899 * both the code and its data) or a partial uninstall (leaving its data,
3900 * implying that this is an update).
3901 */
3902 public static final String EXTRA_DATA_REMOVED = "android.intent.extra.DATA_REMOVED";
EXTRA_REMOVED_FOR_ALL_USERS指示是否为所有的用户删除包
3904 /**
3905 * @hide
3906 * Used as a boolean extra field in {@link android.content.Intent#ACTION_PACKAGE_REMOVED}
3907 * intents to indicate that at this point the package has been removed for
3908 * all users on the device.
3909 */
3910 public static final String EXTRA_REMOVED_FOR_ALL_USERS
3911 = "android.intent.extra.REMOVED_FOR_ALL_USERS";
EXTRA_REPLACING表明包正在做替换
3913 /**
3914 * Used as a boolean extra field in {@link android.content.Intent#ACTION_PACKAGE_REMOVED}
3915 * intents to indicate that this is a replacement of the package, so this
3916 * broadcast will immediately be followed by an add broadcast for a
3917 * different version of the same package.
3918 */
3919 public static final String EXTRA_REPLACING = "android.intent.extra.REPLACING";
EXTRA_ALARM_COUNT表明有多少个闹钟排队等待唤醒
3921 /**
3922 * Used as an int extra field in {@link android.app.AlarmManager} intents
3923 * to tell the application being invoked how many pending alarms are being
3924 * delievered with the intent. For one-shot alarms this will always be 1.
3925 * For recurring alarms, this might be greater than 1 if the device was
3926 * asleep or powered off at the time an earlier alarm would have been
3927 * delivered.
3928 */
3929 public static final String EXTRA_ALARM_COUNT = "android.intent.extra.ALARM_COUNT";
EXTRA_DOCK_STATE表明dock的状态；EXTRA_DOCK_STATE_UNLOCKED表明没有插入dock;EXTRA_DOCK_STATE_DESK表明dock是桌面模式;EXTRA_DOCK_STATE_CAR表明dock是car模式;EXTRA_DOCK_STATE_LE_DESK表明dock是low len桌面;EXTRA_DOCK_STATE_HE_DESK表明dock是high end桌面;METADATA_DOCK_HOME表明homekey由桌面dock接管
3931 /**
3932 * Used as an int extra field in {@link android.content.Intent#ACTION_DOCK_EVENT}
3933 * intents to request the dock state. Possible values are
3934 * {@link android.content.Intent#EXTRA_DOCK_STATE_UNDOCKED},
3935 * {@link android.content.Intent#EXTRA_DOCK_STATE_DESK}, or
3936 * {@link android.content.Intent#EXTRA_DOCK_STATE_CAR}, or
3937 * {@link android.content.Intent#EXTRA_DOCK_STATE_LE_DESK}, or
3938 * {@link android.content.Intent#EXTRA_DOCK_STATE_HE_DESK}.
3939 */
3940 public static final String EXTRA_DOCK_STATE = "android.intent.extra.DOCK_STATE";
3941
3942 /**
3943 * Used as an int value for {@link android.content.Intent#EXTRA_DOCK_STATE}
3944 * to represent that the phone is not in any dock.
3945 */
3946 public static final int EXTRA_DOCK_STATE_UNDOCKED = 0;
3947
3948 /**
3949 * Used as an int value for {@link android.content.Intent#EXTRA_DOCK_STATE}
3950 * to represent that the phone is in a desk dock.
3951 */
3952 public static final int EXTRA_DOCK_STATE_DESK = 1;
3953
3954 /**
3955 * Used as an int value for {@link android.content.Intent#EXTRA_DOCK_STATE}
3956 * to represent that the phone is in a car dock.
3957 */
3958 public static final int EXTRA_DOCK_STATE_CAR = 2;
3959
3960 /**
3961 * Used as an int value for {@link android.content.Intent#EXTRA_DOCK_STATE}
3962 * to represent that the phone is in a analog (low end) dock.
3963 */
3964 public static final int EXTRA_DOCK_STATE_LE_DESK = 3;
3965
3966 /**
3967 * Used as an int value for {@link android.content.Intent#EXTRA_DOCK_STATE}
3968 * to represent that the phone is in a digital (high end) dock.
3969 */
3970 public static final int EXTRA_DOCK_STATE_HE_DESK = 4;
3971
3972 /**
3973 * Boolean that can be supplied as meta-data with a dock activity, to
3974 * indicate that the dock should take over the home key when it is active.
3975 */
3976 public static final String METADATA_DOCK_HOME = "android.dock_home";
EXTRA_BUG_REPORT表明bug report的parcelable对象
3978 /**
3979 * Used as a parcelable extra field in {@link #ACTION_APP_ERROR}, containing
3980 * the bug report.
3981 */
3982 public static final String EXTRA_BUG_REPORT = "android.intent.extra.BUG_REPORT";
EXTRA_REMOTE_TOKEN为remote intent用的token
3984 /**
3985 * Used in the extra field in the remote intent. It's astring token passed with the
3986 * remote intent.
3987 */
3988 public static final String EXTRA_REMOTE_INTENT_TOKEN =
3989 "android.intent.extra.remote_intent_token";
EXTRA_CHANGED_COMPONENT_NAME表明被改边的component名字，已被废弃;EXTRA_CHANGED_PACKAGE_LIST表明改变了的package list;EXTRA_CHANGED_UID_LIST表明改变了的uid list
3991 /**
3992 * @deprecated See {@link #EXTRA_CHANGED_COMPONENT_NAME_LIST}; this field
3993 * will contain only the first name in the list.
3994 */
3995 @Deprecated public static final String EXTRA_CHANGED_COMPONENT_NAME =
3996 "android.intent.extra.changed_component_name";
3997
3998 /**
3999 * This field is part of {@link android.content.Intent#ACTION_PACKAGE_CHANGED},
4000 * and contains a string array of all of the components that have changed. If
4001 * the state of the overall package has changed, then it will contain an entry
4002 * with the package name itself.
4003 */
4004 public static final String EXTRA_CHANGED_COMPONENT_NAME_LIST =
4005 "android.intent.extra.changed_component_name_list";
4006
4007 /**
4008 * This field is part of
4009 * {@link android.content.Intent#ACTION_EXTERNAL_APPLICATIONS_AVAILABLE},
4010 * {@link android.content.Intent#ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE},
4011 * {@link android.content.Intent#ACTION_PACKAGES_SUSPENDED},
4012 * {@link android.content.Intent#ACTION_PACKAGES_UNSUSPENDED}
4013 * and contains a string array of all of the components that have changed.
4014 */
4015 public static final String EXTRA_CHANGED_PACKAGE_LIST =
4016 "android.intent.extra.changed_package_list";
4017
4018 /**
4019 * This field is part of
4020 * {@link android.content.Intent#ACTION_EXTERNAL_APPLICATIONS_AVAILABLE},
4021 * {@link android.content.Intent#ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE}
4022 * and contains an integer array of uids of all of the components
4023 * that have changed.
4024 */
4025 public static final String EXTRA_CHANGED_UID_LIST =
4026 "android.intent.extra.changed_uid_list";
EXTRA_CLENT_LABEL在binding是表明谁绑定到了某个服务；EXTRA_CLENT_INTENT表明可以被其启动的PendingIntent
4028 /**
4029 * @hide
4030 * Magic extra system code can use when binding, to give a label for
4031 * who it is that has bound to a service. This is an integer giving
4032 * a framework string resource that can be displayed to the user.
4033 */
4034 public static final String EXTRA_CLIENT_LABEL =
4035 "android.intent.extra.client_label";
4036
4037 /**
4038 * @hide
4039 * Magic extra system code can use when binding, to give a PendingIntent object
4040 * that can be launched for the user to disable the system's use of this
4041 * service.
4042 */
4043 public static final String EXTRA_CLIENT_INTENT =
4044 "android.intent.extra.client_intent";
EXTRA_LOCAL_ONLY指示是否是只使用本地的数据
4046 /**
4047 * Extra used to indicate that an intent should only return data that is on
4048 * the local device. This is a boolean extra; the default is false. If true,
4049 * an implementation should only allow the user to select data that is
4050 * already on the device, not requiring it be downloaded from a remote
4051 * service when opened.
4052 *
4053 * @see #ACTION_GET_CONTENT
4054 * @see #ACTION_OPEN_DOCUMENT
4055 * @see #ACTION_OPEN_DOCUMENT_TREE
4056 * @see #ACTION_CREATE_DOCUMENT
4057 */
4058 public static final String EXTRA_LOCAL_ONLY =
4059 "android.intent.extra.LOCAL_ONLY";
4060
EXTRA_ALLOW_MULTIPLE允许选择多个对象
4061 /**
4062 * Extra used to indicate that an intent can allow the user to select and
4063 * return multiple items. This is a boolean extra; the default is false. If
4064 * true, an implementation is allowed to present the user with a UI where
4065 * they can pick multiple items that are all returned to the caller. When
4066 * this happens, they should be returned as the {@link #getClipData()} part
4067 * of the result Intent.
4068 *
4069 * @see #ACTION_GET_CONTENT
4070 * @see #ACTION_OPEN_DOCUMENT
4071 */
4072 public static final String EXTRA_ALLOW_MULTIPLE =
4073 "android.intent.extra.ALLOW_MULTIPLE";
EXTRA_USER_HANDLE表明用户句柄
4075 /**
4076 * The integer userHandle carried with broadcast intents related to addition, removal and
4077 * switching of users and managed profiles - {@link #ACTION_USER_ADDED},
4078 * {@link #ACTION_USER_REMOVED} and {@link #ACTION_USER_SWITCHED}.
4079 *
4080 * @hide
4081 */
4082 public static final String EXTRA_USER_HANDLE =
4083 "android.intent.extra.user_handle";
4084
EXTRA_USER表明相应用户
4085 /**
4086 * The UserHandle carried with broadcasts intents related to addition and removal of managed
4087 * profiles - {@link #ACTION_MANAGED_PROFILE_ADDED} and {@link #ACTION_MANAGED_PROFILE_REMOVED}.
4088 */
4089 public static final String EXTRA_USER =
4090 "android.intent.extra.USER";
EXTRA_RESTRICTIONS_LIST，EXTRA_RESTRICTIONS_BUNDLE，EXTRA_RESTRICTIONS_INTENT表明相应限制权限的LIST，BUNDLE，INTENT
4092 /**
4093 * Extra used in the response from a BroadcastReceiver that handles
4094 * {@link #ACTION_GET_RESTRICTION_ENTRIES}. The type of the extra is
4095 * <code>ArrayList<RestrictionEntry></code>.
4096 */
4097 public static final String EXTRA_RESTRICTIONS_LIST = "android.intent.extra.restrictions_list";
4098
4099 /**
4100 * Extra sent in the intent to the BroadcastReceiver that handles
4101 * {@link #ACTION_GET_RESTRICTION_ENTRIES}. The type of the extra is a Bundle containing
4102 * the restrictions as key/value pairs.
4103 */
4104 public static final String EXTRA_RESTRICTIONS_BUNDLE =
4105 "android.intent.extra.restrictions_bundle";
4106
4107 /**
4108 * Extra used in the response from a BroadcastReceiver that handles
4109 * {@link #ACTION_GET_RESTRICTION_ENTRIES}.
4110 */
4111 public static final String EXTRA_RESTRICTIONS_INTENT =
4112 "android.intent.extra.restrictions_intent";
EXTRA_MIME_TYPES表明MIME的类型
4114 /**
4115 * Extra used to communicate a set of acceptable MIME types. The type of the
4116 * extra is {@code String[]}. Values may be a combination of concrete MIME
4117 * types (such as "image/png") and/or partial MIME types (such as
4118 * "audio/*").
4119 *
4120 * @see #ACTION_GET_CONTENT
4121 * @see #ACTION_OPEN_DOCUMENT
4122 */
4123 public static final String EXTRA_MIME_TYPES = "android.intent.extra.MIME_TYPES";
EXTRA_SHUTDOWN_USERSPACE_ONLY表明是否只是重启用户空间的软件
4125 /**
4126 * Optional extra for {@link #ACTION_SHUTDOWN} that allows the sender to qualify that
4127 * this shutdown is only for the user space of the system, not a complete shutdown.
4128 * When this is true, hardware devices can use this information to determine that
4129 * they shouldn't do a complete shutdown of their device since this is not a
4130 * complete shutdown down to the kernel, but only user space restarting.
4131 * The default if not supplied is false.
4132 */
4133 public static final String EXTRA_SHUTDOWN_USERSPACE_ONLY
4134 = "android.intent.extra.SHUTDOWN_USERSPACE_ONLY";
EXTRA_TIME_PREF_24_HOUR_FORMAT表明是否倾向24小时时间格式
4136 /**
4137 * Optional boolean extra for {@link #ACTION_TIME_CHANGED} that indicates the
4138 * user has set their time format preferences to the 24 hour format.
4139 *
4140 * @hide for internal use only.
4141 */
4142 public static final String EXTRA_TIME_PREF_24_HOUR_FORMAT =
4143 "android.intent.extra.TIME_PREF_24_HOUR_FORMAT";
EXTRA_REASONG为reboot reason
4145 /** {@hide} */
4146 public static final String EXTRA_REASON = "android.intent.extra.REASON";
EXTRA_SIM_ACTIVATION_RESPONSE表明sim激活的回复
4151 /**
4152 * Optional {@link android.app.PendingIntent} extra used to deliver the result of the SIM
4153 * activation request.
4154 * TODO: Add information about the structure and response data used with the pending intent.
4155 * @hide
4156 */
4157 public static final String EXTRA_SIM_ACTIVATION_RESPONSE =
4158 "android.intent.extra.SIM_ACTIVATION_RESPONSE";
4159
EXTRA_INDEX取决于具体情景，表明不同的index
4160 /**
4161 * Optional index with semantics depending on the intent action.
4162 *
4163 * <p>The value must be an integer greater or equal to 0.
4164 */
4165 public static final String EXTRA_INDEX = "android.intent.extra.INDEX";
EXTRA_QUIET_MODE表明是否进入安静模式
4160 /**
4161 * Optional index with semantics depending on the intent action.
4162 *
4163 * <p>The value must be an integer greater or equal to 0.
4164 */
4165 public static final String EXTRA_INDEX = "android.intent.extra.INDEX";
EXTRA_MEDIA_RESOURCE_TYPE表明过的的媒体类型；EXTRA_MEDIA_RESOURCE_TYPE_VIDEO_CODEC表明媒体类型为视频；EXTRA_MEDIA_RESOURCE_TYPE_AUDIO_CODEC表明媒体类型为音频
4186 /**
4187 * Used as an int value for {@link #EXTRA_MEDIA_RESOURCE_TYPE}
4188 * to represent that a video codec is allowed to use.
4189 *
4190 * @hide
4191 */
4192 public static final int EXTRA_MEDIA_RESOURCE_TYPE_VIDEO_CODEC = 0;
4193
4194 /**
4195 * Used as an int value for {@link #EXTRA_MEDIA_RESOURCE_TYPE}
4196 * to represent that a audio codec is allowed to use.
4197 *
4198 * @hide
4199 */
4200 public static final int EXTRA_MEDIA_RESOURCE_TYPE_AUDIO_CODEC = 1;
下面是Intent里的flags
先是定义一个注解类GrantUriMode
4202 // ---------------------------------------------------------------------
4203 // ---------------------------------------------------------------------
4204 // Intent flags (see mFlags variable).
4205
4206 /** @hide */
4207 @IntDef(flag = true, value = {
4208 FLAG_GRANT_READ_URI_PERMISSION, FLAG_GRANT_WRITE_URI_PERMISSION,
4209 FLAG_GRANT_PERSISTABLE_URI_PERMISSION, FLAG_GRANT_PREFIX_URI_PERMISSION })
4210 @Retention(RetentionPolicy.SOURCE)
4211 public @interface GrantUriMode {}
然后是AccessUriMode注解类
4213 /** @hide */
4214 @IntDef(flag = true, value = {
4215 FLAG_GRANT_READ_URI_PERMISSION, FLAG_GRANT_WRITE_URI_PERMISSION })
4216 @Retention(RetentionPolicy.SOURCE)
4217 public @interface AccessUriMode {}
4218
静态函数isAccessUriMode表明是否是可以访问Uri模式
4219 /**
4220 * Test if given mode flags specify an access mode, which must be at least
4221 * read and/or write.
4222 *
4223 * @hide
4224 */
4225 public static boolean isAccessUriMode(int modeFlags) {
4226 return (modeFlags & (Intent.FLAG_GRANT_READ_URI_PERMISSION
4227 | Intent.FLAG_GRANT_WRITE_URI_PERMISSION)) != 0;
4228 }
FLAG_GRANT_READ_URI_PERMISSION和FLAG_GRANT_WRITE_URI_PERMISSION表明授予Intent接收者读写权限
/**
4231 * If set, the recipient of this Intent will be granted permission to
4232 * perform read operations on the URI in the Intent's data and any URIs
4233 * specified in its ClipData. When applying to an Intent's ClipData,
4234 * all URIs as well as recursive traversals through data or other ClipData
4235 * in Intent items will be granted; only the grant flags of the top-level
4236 * Intent are used.
4237 */
public static final int FLAG_GRANT_READ_URI_PERMISSION = 0x00000001;
/**
4240 * If set, the recipient of this Intent will be granted permission to
4241 * perform write operations on the URI in the Intent's data and any URIs
4242 * specified in its ClipData. When applying to an Intent's ClipData,
4243 * all URIs as well as recursive traversals through data or other ClipData
4244 * in Intent items will be granted; only the grant flags of the top-level
4245 * Intent are used.
4246 */
public static final int FLAG_GRANT_WRITE_URI_PERMISSION = 0x00000002;
FLAG_FROM_BACKGROUND表明Intent是从后台程序发出来的
/**
4249 * Can be set by the caller to indicate that this Intent is coming from
4250 * a background operation, not from direct user interaction.
4251 */
public static final int FLAG_FROM_BACKGROUND = 0x00000004;
FLAG_DEBUG_LOG_RESOLUTION表明打印解析intent的log
/**
4254 * A flag you can enable for debugging: when set, log messages will be
4255 * printed during the resolution of this intent to show you what has
4256 * been found to create the final resolved list.
4257 */
public static final int FLAG_DEBUG_LOG_RESOLUTION = 0x00000008;
FLAGS_EXCLUDE_STOPPED_PACKAGES表明排除停止运行的包；FLAG_INCLUDE_STOPPED_PACKAGES包含了停止运行的包，即使exclued的设置了
4259 /**
4260 * If set, this intent will not match any components in packages that
4261 * are currently stopped. If this is not set, then the default behavior
4262 * is to include such applications in the result.
4263 */
4264 public static final int FLAG_EXCLUDE_STOPPED_PACKAGES = 0x00000010;
4265 /**
4266 * If set, this intent will always match any components in packages that
4267 * are currently stopped. This is the default behavior when
4268 * {@link #FLAG_EXCLUDE_STOPPED_PACKAGES} is not set. If both of these
4269 * flags are set, this one wins (it allows overriding of exclude for
4270 * places where the framework may automatically set the exclude flag).
4271 */
4272 public static final int FLAG_INCLUDE_STOPPED_PACKAGES = 0x00000020;
FLAG_GRANT_PERSISTABLE_URI_PERMISSION表明权限授权会永久保留
4274 /**
4275 * When combined with {@link #FLAG_GRANT_READ_URI_PERMISSION} and/or
4276 * {@link #FLAG_GRANT_WRITE_URI_PERMISSION}, the URI permission grant can be
4277 * persisted across device reboots until explicitly revoked with
4278 * {@link Context#revokeUriPermission(Uri, int)}. This flag only offers the
4279 * grant for possible persisting; the receiving application must call
4280 * {@link ContentResolver#takePersistableUriPermission(Uri, int)} to
4281 * actually persist.
4282 *
4283 * @see ContentResolver#takePersistableUriPermission(Uri, int)
4284 * @see ContentResolver#releasePersistableUriPermission(Uri, int)
4285 * @see ContentResolver#getPersistedUriPermissions()
4286 * @see ContentResolver#getOutgoingPersistedUriPermissions()
4287 */
4288 public static final int FLAG_GRANT_PERSISTABLE_URI_PERMISSION = 0x00000040;
FLAG_GRANT_PREFIX_URI_PERMISSION表明grant前缀匹配
4290 /**
4291 * When combined with {@link #FLAG_GRANT_READ_URI_PERMISSION} and/or
4292 * {@link #FLAG_GRANT_WRITE_URI_PERMISSION}, the URI permission grant
4293 * applies to any URI that is a prefix match against the original granted
4294 * URI. (Without this flag, the URI must match exactly for access to be
4295 * granted.) Another URI is considered a prefix match only when scheme,
4296 * authority, and all path segments defined by the prefix are an exact
4297 * match.
4298 */
4299 public static final int FLAG_GRANT_PREFIX_URI_PERMISSION = 0x00000080;
FLAG_DEBUG_TRIAGED_MISSING表明已经系统组件验证过包里的组件了
4301 /**
4302 * Internal flag used to indicate that a system component has done their
4303 * homework and verified that they correctly handle packages and components
4304 * that come and go over time. In particular:
4305 * <ul>
4306 * <li>Apps installed on external storage, which will appear to be
4307 * uninstalled while the the device is ejected.
4308 * <li>Apps with encryption unaware components, which will appear to not
4309 * exist while the device is locked.
4310 * </ul>
4311 *
4312 * @hide
4313 */
4314 public static final int FLAG_DEBUG_TRIAGED_MISSING = 0x00000100;
4315
FLAG_IGNORE_EPHEMERAL忽略ephemeral app
4316 /**
4317 * Internal flag used to indicate ephemeral applications should not be
4318 * considered when resolving the intent.
4319 *
4320 * @hide
4321 */
4322 public static final int FLAG_IGNORE_EPHEMERAL = 0x00000200;
4323
FLAG_ACTIVITY_NO_HISTORY表明启动的activity不会出现在历史栈里
4324 /**
4325 * If set, the new activity is not kept in the history stack. As soon as
4326 * the user navigates away from it, the activity is finished. This may also
4327 * be set with the {@link android.R.styleable#AndroidManifestActivity_noHistory
4328 * noHistory} attribute.
4329 *
4330 * <p>If set, {@link android.app.Activity#onActivityResult onActivityResult()}
4331 * is never invoked when the current activity starts a new activity which
4332 * sets a result and finishes.
4333 */
4334 public static final int FLAG_ACTIVITY_NO_HISTORY = 0x40000000;
FLAG_ACTIVITY_SINGLE_TOP表明activity只能在栈顶有一个实例
4335 /**
4336 * If set, the activity will not be launched if it is already running
4337 * at the top of the history stack.
4338 */
4339 public static final int FLAG_ACTIVITY_SINGLE_TOP = 0x20000000;
FLAG_ACTIVITY_NEW_TASK表明activity新起一个task，在任务管理器里新增一个。这个flag不能用于要求返回结果的activity
4340 /**
4341 * If set, this activity will become the start of a new task on this
4342 * history stack. A task (from the activity that started it to the
4343 * next task activity) defines an atomic group of activities that the
4344 * user can move to. Tasks can be moved to the foreground and background;
4345 * all of the activities inside of a particular task always remain in
4346 * the same order. See
4347 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
4348 * Stack</a> for more information about tasks.
4349 *
4350 * <p>This flag is generally used by activities that want
4351 * to present a "launcher" style behavior: they give the user a list of
4352 * separate things that can be done, which otherwise run completely
4353 * independently of the activity launching them.
4354 *
4355 * <p>When using this flag, if a task is already running for the activity
4356 * you are now starting, then a new activity will not be started; instead,
4357 * the current task will simply be brought to the front of the screen with
4358 * the state it was last in. See {@link #FLAG_ACTIVITY_MULTIPLE_TASK} for a flag
4359 * to disable this behavior.
4360 *
4361 * <p>This flag can not be used when the caller is requesting a result from
4362 * the activity being launched.
4363 */
4364 public static final int FLAG_ACTIVITY_NEW_TASK = 0x10000000;
FLAG_ACTIVITY_MULTIPLE_TASK允许即使在一个activity已经存在于一个task的情况下新开一个task
4365 /**
4366 * This flag is used to create a new task and launch an activity into it.
4367 * This flag is always paired with either {@link #FLAG_ACTIVITY_NEW_DOCUMENT}
4368 * or {@link #FLAG_ACTIVITY_NEW_TASK}. In both cases these flags alone would
4369 * search through existing tasks for ones matching this Intent. Only if no such
4370 * task is found would a new task be created. When paired with
4371 * FLAG_ACTIVITY_MULTIPLE_TASK both of these behaviors are modified to skip
4372 * the search for a matching task and unconditionally start a new task.
4373 *
4374 * <strong>When used with {@link #FLAG_ACTIVITY_NEW_TASK} do not use this
4375 * flag unless you are implementing your own
4376 * top-level application launcher.</strong> Used in conjunction with
4377 * {@link #FLAG_ACTIVITY_NEW_TASK} to disable the
4378 * behavior of bringing an existing task to the foreground. When set,
4379 * a new task is <em>always</em> started to host the Activity for the
4380 * Intent, regardless of whether there is already an existing task running
4381 * the same thing.
4382 *
4383 * <p><strong>Because the default system does not include graphical task management,
4384 * you should not use this flag unless you provide some way for a user to
4385 * return back to the tasks you have launched.</strong>
4386 *
4387 * See {@link #FLAG_ACTIVITY_NEW_DOCUMENT} for details of this flag's use for
4388 * creating new document tasks.
4389 *
4390 * <p>This flag is ignored if one of {@link #FLAG_ACTIVITY_NEW_TASK} or
4391 * {@link #FLAG_ACTIVITY_NEW_DOCUMENT} is not also set.
4392 *
4393 * <p>See
4394 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
4395 * Stack</a> for more information about tasks.
4396 *
4397 * @see #FLAG_ACTIVITY_NEW_DOCUMENT
4398 * @see #FLAG_ACTIVITY_NEW_TASK
4399 */
4400 public static final int FLAG_ACTIVITY_MULTIPLE_TASK = 0x08000000;
FLAG_ACTIVITY_CLEAR_TOP清除目标activity之上的activity
4401 /**
4402 * If set, and the activity being launched is already running in the
4403 * current task, then instead of launching a new instance of that activity,
4404 * all of the other activities on top of it will be closed and this Intent
4405 * will be delivered to the (now on top) old activity as a new Intent.
4406 *
4407 * <p>For example, consider a task consisting of the activities: A, B, C, D.
4408 * If D calls startActivity() with an Intent that resolves to the component
4409 * of activity B, then C and D will be finished and B receive the given
4410 * Intent, resulting in the stack now being: A, B.
4411 *
4412 * <p>The currently running instance of activity B in the above example will
4413 * either receive the new intent you are starting here in its
4414 * onNewIntent() method, or be itself finished and restarted with the
4415 * new intent. If it has declared its launch mode to be "multiple" (the
4416 * default) and you have not set {@link #FLAG_ACTIVITY_SINGLE_TOP} in
4417 * the same intent, then it will be finished and re-created; for all other
4418 * launch modes or if {@link #FLAG_ACTIVITY_SINGLE_TOP} is set then this
4419 * Intent will be delivered to the current instance's onNewIntent().
4420 *
4421 * <p>This launch mode can also be used to good effect in conjunction with
4422 * {@link #FLAG_ACTIVITY_NEW_TASK}: if used to start the root activity
4423 * of a task, it will bring any currently running instance of that task
4424 * to the foreground, and then clear it to its root state. This is
4425 * especially useful, for example, when launching an activity from the
4426 * notification manager.
4427 *
4428 * <p>See
4429 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
4430 * Stack</a> for more information about tasks.
4431 */
4432 public static final int FLAG_ACTIVITY_CLEAR_TOP = 0x04000000;
FLAG_ACTIVITY_FORWARD_RESULT表明新启动的activity传送的result将会给原来等待结果的，而不是现在的启动者
4433 /**
4434 * If set and this intent is being used to launch a new activity from an
4435 * existing one, then the reply target of the existing activity will be
4436 * transfered to the new activity. This way the new activity can call
4437 * {@link android.app.Activity#setResult} and have that result sent back to
4438 * the reply target of the original activity.
4439 */
4440 public static final int FLAG_ACTIVITY_FORWARD_RESULT = 0x02000000;
FLAG_ACTIVITY_PREVIOUS_IS_TOP表明前一个activity是top
4441 /**
4442 * If set and this intent is being used to launch a new activity from an
4443 * existing one, the current activity will not be counted as the top
4444 * activity for deciding whether the new intent should be delivered to
4445 * the top instead of starting a new one. The previous activity will
4446 * be used as the top, with the assumption being that the current activity
4447 * will finish itself immediately.
4448 */
4449 public static final int FLAG_ACTIVITY_PREVIOUS_IS_TOP = 0x01000000;
FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS表明新的activity不会出现在最近的activity列表里
4450 /**
4451 * If set, the new activity is not kept in the list of recently launched
4452 * activities.
4453 */
4454 public static final int FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS = 0x00800000;
FLAG_ACTIVITY_BROUGHT_TO_FRONT是系统为单任务而设置
4455 /**
4456 * This flag is not normally set by application code, but set for you by
4457 * the system as described in the
4458 * {@link android.R.styleable#AndroidManifestActivity_launchMode
4459 * launchMode} documentation for the singleTask mode.
4460 */
4461 public static final int FLAG_ACTIVITY_BROUGHT_TO_FRONT = 0x00400000;
FLAG_ACTIVITY_RESET_TASK_IF_NEEDED表明activity被启动为一个新任务或者成为某个task的top。导致相应的task被重新设置
4462 /**
4463 * If set, and this activity is either being started in a new task or
4464 * bringing to the top an existing task, then it will be launched as
4465 * the front door of the task. This will result in the application of
4466 * any affinities needed to have that task in the proper state (either
4467 * moving activities to or from it), or simply resetting that task to
4468 * its initial state if needed.
4469 */
4470 public static final int FLAG_ACTIVITY_RESET_TASK_IF_NEEDED = 0x00200000;
FLAG_LAUNCHED_FROM_HISTORY表明从历史中启动，由系统设定
4471 /**
4472 * This flag is not normally set by application code, but set for you by
4473 * the system if this activity is being launched from history
4474 * (longpress home key).
4475 */
4476 public static final int FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY = 0x00100000;
FLAG_ACTIVITY_CLEAR_WHEN_TASK_CLEAR已经被废弃，用FLAG_ACTIVITY_NEW_DOCUMENT取代
4477 /**
4478 * @deprecated As of API 21 this performs identically to
4479 * {@link #FLAG_ACTIVITY_NEW_DOCUMENT} which should be used instead of this.
4480 */
4481 public static final int FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET = 0x00080000;
FLAG_ACTIVITY_NEW_DOCUMENT的值和FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET一样,表明同一个activity的不同实例包含不同文档可以出现在最近任务列表里
4482 /**
4483 * This flag is used to open a document into a new task rooted at the activity launched
4484 * by this Intent. Through the use of this flag, or its equivalent attribute,
4485 * {@link android.R.attr#documentLaunchMode} multiple instances of the same activity
4486 * containing different documents will appear in the recent tasks list.
4487 *
4488 * <p>The use of the activity attribute form of this,
4489 * {@link android.R.attr#documentLaunchMode}, is
4490 * preferred over the Intent flag described here. The attribute form allows the
4491 * Activity to specify multiple document behavior for all launchers of the Activity
4492 * whereas using this flag requires each Intent that launches the Activity to specify it.
4493 *
4494 * <p>Note that the default semantics of this flag w.r.t. whether the recents entry for
4495 * it is kept after the activity is finished is different than the use of
4496 * {@link #FLAG_ACTIVITY_NEW_TASK} and {@link android.R.attr#documentLaunchMode} -- if
4497 * this flag is being used to create a new recents entry, then by default that entry
4498 * will be removed once the activity is finished. You can modify this behavior with
4499 * {@link #FLAG_ACTIVITY_RETAIN_IN_RECENTS}.
4500 *
4501 * <p>FLAG_ACTIVITY_NEW_DOCUMENT may be used in conjunction with {@link
4502 * #FLAG_ACTIVITY_MULTIPLE_TASK}. When used alone it is the
4503 * equivalent of the Activity manifest specifying {@link
4504 * android.R.attr#documentLaunchMode}="intoExisting". When used with
4505 * FLAG_ACTIVITY_MULTIPLE_TASK it is the equivalent of the Activity manifest specifying
4506 * {@link android.R.attr#documentLaunchMode}="always".
4507 *
4508 * Refer to {@link android.R.attr#documentLaunchMode} for more information.
4509 *
4510 * @see android.R.attr#documentLaunchMode
4511 * @see #FLAG_ACTIVITY_MULTIPLE_TASK
4512 */
4513 public static final int FLAG_ACTIVITY_NEW_DOCUMENT = FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET;
FLAG_ACTIVITY_NO_USER_ACTION表明onUserLeaveHint不会被调用
4514 /**
4515 * If set, this flag will prevent the normal {@link android.app.Activity#onUserLeaveHint}
4516 * callback from occurring on the current frontmost activity before it is
4517 * paused as the newly-started activity is brought to the front.
4518 *
4519 * <p>Typically, an activity can rely on that callback to indicate that an
4520 * explicit user action has caused their activity to be moved out of the
4521 * foreground. The callback marks an appropriate point in the activity's
4522 * lifecycle for it to dismiss any notifications that it intends to display
4523 * "until the user has seen them," such as a blinking LED.
4524 *
4525 * <p>If an activity is ever started via any non-user-driven events such as
4526 * phone-call receipt or an alarm handler, this flag should be passed to {@link
4527 * Context#startActivity Context.startActivity}, ensuring that the pausing
4528 * activity does not think the user has acknowledged its notification.
4529 */
4530 public static final int FLAG_ACTIVITY_NO_USER_ACTION = 0x00040000;
FLAG_ACTIVITY_REORDER_TO_FRONT表明activity被启动后要去栈顶
4531 /**
4532 * If set in an Intent passed to {@link Context#startActivity Context.startActivity()},
4533 * this flag will cause the launched activity to be brought to the front of its
4534 * task's history stack if it is already running.
4535 *
4536 * <p>For example, consider a task consisting of four activities: A, B, C, D.
4537 * If D calls startActivity() with an Intent that resolves to the component
4538 * of activity B, then B will be brought to the front of the history stack,
4539 * with this resulting order: A, C, D, B.
4540 *
4541 * This flag will be ignored if {@link #FLAG_ACTIVITY_CLEAR_TOP} is also
4542 * specified.
4543 */
4544 public static final int FLAG_ACTIVITY_REORDER_TO_FRONT = 0X00020000;
FLAG_ACTIVITY_NO_ANIMATION表明不显示过场动画
4545 /**
4546 * If set in an Intent passed to {@link Context#startActivity Context.startActivity()},
4547 * this flag will prevent the system from applying an activity transition
4548 * animation to go to the next activity state. This doesn't mean an
4549 * animation will never run -- if another activity change happens that doesn't
4550 * specify this flag before the activity started here is displayed, then
4551 * that transition will be used. This flag can be put to good use
4552 * when you are going to do a series of activity operations but the
4553 * animation seen by the user shouldn't be driven by the first activity
4554 * change but rather a later one.
4555 */
4556 public static final int FLAG_ACTIVITY_NO_ANIMATION = 0X00010000;
FLAG_ACTIVITY_CLEAR_TASK表明旧的关联task被清除
4557 /**
4558 * If set in an Intent passed to {@link Context#startActivity Context.startActivity()},
4559 * this flag will cause any existing task that would be associated with the
4560 * activity to be cleared before the activity is started. That is, the activity
4561 * becomes the new root of an otherwise empty task, and any old activities
4562 * are finished. This can only be used in conjunction with {@link #FLAG_ACTIVITY_NEW_TASK}.
4563 */
4564 public static final int FLAG_ACTIVITY_CLEAR_TASK = 0X00008000;
FLAG_ACTIVITY_TASK_ON_HOME表明退出这个task后返回到home界面
4565 /**
4566 * If set in an Intent passed to {@link Context#startActivity Context.startActivity()},
4567 * this flag will cause a newly launching task to be placed on top of the current
4568 * home activity task (if there is one). That is, pressing back from the task
4569 * will always return the user to home even if that was not the last activity they
4570 * saw. This can only be used in conjunction with {@link #FLAG_ACTIVITY_NEW_TASK}.
4571 */
4572 public static final int FLAG_ACTIVITY_TASK_ON_HOME = 0X00004000;
FLAG_ACTIVITY_RETAIN_IN_RECENTS表明activity保持在recent列表里
4573 /**
4574 * By default a document created by {@link #FLAG_ACTIVITY_NEW_DOCUMENT} will
4575 * have its entry in recent tasks removed when the user closes it (with back
4576 * or however else it may finish()). If you would like to instead allow the
4577 * document to be kept in recents so that it can be re-launched, you can use
4578 * this flag. When set and the task's activity is finished, the recents
4579 * entry will remain in the interface for the user to re-launch it, like a
4580 * recents entry for a top-level application.
4581 * <p>
4582 * The receiving activity can override this request with
4583 * {@link android.R.attr#autoRemoveFromRecents} or by explcitly calling
4584 * {@link android.app.Activity#finishAndRemoveTask()
4585 * Activity.finishAndRemoveTask()}.
4586 */
4587 public static final int FLAG_ACTIVITY_RETAIN_IN_RECENTS = 0x00002000;
FLAG_ACTIVITY_LAUNCH_ADJACENT用在多屏模式，表明activity在一个新的屏幕启动
4589 /**
4590 * This flag is only used in split-screen multi-window mode. The new activity will be displayed
4591 * adjacent to the one launching it. This can only be used in conjunction with
4592 * {@link #FLAG_ACTIVITY_NEW_TASK}. Also, setting {@link #FLAG_ACTIVITY_MULTIPLE_TASK} is
4593 * required if you want a new instance of an existing activity to be created.
4594 */
4595 public static final int FLAG_ACTIVITY_LAUNCH_ADJACENT = 0x00001000;
4596
FLAG_RECEIVER_REGISTER_ONLY表明只有注册的Broadcast Receiver组件会响应
4597 /**
4598 * If set, when sending a broadcast only registered receivers will be
4599 * called -- no BroadcastReceiver components will be launched.
4600 */
4601 public static final int FLAG_RECEIVER_REGISTERED_ONLY = 0x40000000;
FLAG_RECEIVER_REPLACE_PENDING表明当前Intent替换Pending的Intent
4602 /**
4603 * If set, when sending a broadcast the new broadcast will replace
4604 * any existing pending broadcast that matches it. Matching is defined
4605 * by {@link Intent#filterEquals(Intent) Intent.filterEquals} returning
4606 * true for the intents of the two broadcasts. When a match is found,
4607 * the new broadcast (and receivers associated with it) will replace the
4608 * existing one in the pending broadcast list, remaining at the same
4609 * position in the list.
4610 *
4611 * <p>This flag is most typically used with sticky broadcasts, which
4612 * only care about delivering the most recent values of the broadcast
4613 * to their receivers.
4614 */
4615 public static final int FLAG_RECEIVER_REPLACE_PENDING = 0x20000000;
FLAG_RECEIVER_FOREGROUND表明接受者到前台运行
4616 /**
4617 * If set, when sending a broadcast the recipient is allowed to run at
4618 * foreground priority, with a shorter timeout interval. During normal
4619 * broadcasts the receivers are not automatically hoisted out of the
4620 * background priority class.
4621 */
4622 public static final int FLAG_RECEIVER_FOREGROUND = 0x10000000;
FLAG_RECEIVER_NO_ABORT不允许放弃这个Intent
4623 /**
4624 * If this is an ordered broadcast, don't allow receivers to abort the broadcast.
4625 * They can still propagate results through to later receivers, but they can not prevent
4626 * later receivers from seeing the broadcast.
4627 */
4628 public static final int FLAG_RECEIVER_NO_ABORT = 0x08000000;
FLAG_REVEIVER_REGISTERED_ONLY_BEFORE_BOOT表明只有boot之前注册的组件会响应
4629 /**
4630 * If set, when sending a broadcast <i>before boot has completed</i> only
4631 * registered receivers will be called -- no BroadcastReceiver components
4632 * will be launched. Sticky intent state will be recorded properly even
4633 * if no receivers wind up being called. If {@link #FLAG_RECEIVER_REGISTERED_ONLY}
4634 * is specified in the broadcast intent, this flag is unnecessary.
4635 *
4636 * <p>This flag is only for use by system sevices as a convenience to
4637 * avoid having to implement a more complex mechanism around detection
4638 * of boot completion.
4639 *
4640 * @hide
4641 */
4642 public static final int FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT = 0x04000000;
FLAG_RECEIVER_BOOG_UPGRADE表明在系统ready前可以发Broadcast，为boot upgrade而用
4643 /**
4644 * Set when this broadcast is for a boot upgrade, a special mode that
4645 * allows the broadcast to be sent before the system is ready and launches
4646 * the app process with no providers running in it.
4647 * @hide
4648 */
4649 public static final int FLAG_RECEIVER_BOOT_UPGRADE = 0x02000000;
FLAG_RECEIVER_INCLUDE_BACKGROUND表明只会找后台的程序
4650 /**
4651 * If set, the broadcast will always go to manifest receivers in background (cached
4652 * or not running) apps, regardless of whether that would be done by default. By
4653 * default they will only receive broadcasts if the broadcast has specified an
4654 * explicit component or package name.
4655 * @hide
4656 */
4657 public static final int FLAG_RECEIVER_INCLUDE_BACKGROUND = 0x01000000;
FLAG_RECEIVER_EXCLUDE_BACKGROUND表明不包含后台的程序
4658 /**
4659 * If set, the broadcast will never go to manifest receivers in background (cached
4660 * or not running) apps, regardless of whether that would be done by default. By
4661 * default they will receive broadcasts if the broadcast has specified an
4662 * explicit component or package name.
4663 * @hide
4664 */
4665 public static final int FLAG_RECEIVER_EXCLUDE_BACKGROUND = 0x00800000;
IMMUTABLE_FLAGS是FLAG_GRANT_READ_URI_PERMISSION,FLAG_GRANT_WRIT_URI_PERMISSION,FLAG_GRANT_PERSISTABLE_URI_PERMISSION,FLAG_GRANT_PREFIX_URI_PERMISSION的组合
4667 /**
4668 * @hide Flags that can't be changed with PendingIntent.
4669 */
4670 public static final int IMMUTABLE_FLAGS = FLAG_GRANT_READ_URI_PERMISSION
4671 | FLAG_GRANT_WRITE_URI_PERMISSION | FLAG_GRANT_PERSISTABLE_URI_PERMISSION
4672 | FLAG_GRANT_PREFIX_URI_PERMISSION
URI_INTENT_SCHEME flag表明intetn: 组合
4674 // ---------------------------------------------------------------------
4675 // ---------------------------------------------------------------------
4676 // toUri() and parseUri() options.
4677
4678 /**
4679 * Flag for use with {@link #toUri} and {@link #parseUri}: the URI string
4680 * always has the "intent:" scheme. This syntax can be used when you want
4681 * to later disambiguate between URIs that are intended to describe an
4682 * Intent vs. all others that should be treated as raw URIs. When used
4683 * with {@link #parseUri}, any other scheme will result in a generic
4684 * VIEW action for that raw URI.
4685 */
4686 public static final int URI_INTENT_SCHEME = 1<<0;
URI_ANDROID_APP_SCHEME表明app的scheme，为了某个包名而做的简化。Intent的内容可以包含在这个URI里
4688 /**
4689 * Flag for use with {@link #toUri} and {@link #parseUri}: the URI string
4690 * always has the "android-app:" scheme. This is a variation of
4691 * {@link #URI_INTENT_SCHEME} whose format is simpler for the case of an
4692 * http/https URI being delivered to a specific package name. The format
4693 * is:
4694 *
4695 * <pre class="prettyprint">
4696 * android-app://{package_id}[/{scheme}[/{host}[/{path}]]][#Intent;{...}]</pre>
4697 *
4698 * <p>In this scheme, only the <code>package_id</code> is required. If you include a host,
4699 * you must also include a scheme; including a path also requires both a host and a scheme.
4700 * The final #Intent; fragment can be used without a scheme, host, or path.
4701 * Note that this can not be
4702 * used with intents that have a {@link #setSelector}, since the base intent
4703 * will always have an explicit package name.</p>
4704 *
4705 * <p>Some examples of how this scheme maps to Intent objects:</p>
4706 * <table border="2" width="85%" align="center" frame="hsides" rules="rows">
4707 * <colgroup align="left" />
4708 * <colgroup align="left" />
4709 * <thead>
4710 * <tr><th>URI</th> <th>Intent</th></tr>
4711 * </thead>
4712 *
4713 * <tbody>
4714 * <tr><td><code>android-app://com.example.app</code></td>
4715 * <td><table style="margin:0;border:0;cellpadding:0;cellspacing:0">
4716 * <tr><td>Action: </td><td>{@link #ACTION_MAIN}</td></tr>
4717 * <tr><td>Package: </td><td><code>com.example.app</code></td></tr>
4718 * </table></td>
4719 * </tr>
4720 * <tr><td><code>android-app://com.example.app/http/example.com</code></td>
4721 * <td><table style="margin:0;border:0;cellpadding:0;cellspacing:0">
4722 * <tr><td>Action: </td><td>{@link #ACTION_VIEW}</td></tr>
4723 * <tr><td>Data: </td><td><code>http://example.com/</code></td></tr>
4724 * <tr><td>Package: </td><td><code>com.example.app</code></td></tr>
4725 * </table></td>
4726 * </tr>
4727 * <tr><td><code>android-app://com.example.app/http/example.com/foo?1234</code></td>
4728 * <td><table style="margin:0;border:0;cellpadding:0;cellspacing:0">
4729 * <tr><td>Action: </td><td>{@link #ACTION_VIEW}</td></tr>
4730 * <tr><td>Data: </td><td><code>http://example.com/foo?1234</code></td></tr>
4731 * <tr><td>Package: </td><td><code>com.example.app</code></td></tr>
4732 * </table></td>
4733 * </tr>
4734 * <tr><td><code>android-app://com.example.app/<br />#Intent;action=com.example.MY_ACTION;end</code></td>
4735 * <td><table style="margin:0;border:0;cellpadding:0;cellspacing:0">
4736 * <tr><td>Action: </td><td><code>com.example.MY_ACTION</code></td></tr>
4737 * <tr><td>Package: </td><td><code>com.example.app</code></td></tr>
4738 * </table></td>
4739 * </tr>
4740 * <tr><td><code>android-app://com.example.app/http/example.com/foo?1234<br />#Intent;action=com.example.MY_ACTION;end</code></td>
4741 * <td><table style="margin:0;border:0;cellpadding:0;cellspacing:0">
4742 * <tr><td>Action: </td><td><code>com.example.MY_ACTION</code></td></tr>
4743 * <tr><td>Data: </td><td><code>http://example.com/foo?1234</code></td></tr>
4744 * <tr><td>Package: </td><td><code>com.example.app</code></td></tr>
4745 * </table></td>
4746 * </tr>
4747 * <tr><td><code>android-app://com.example.app/<br />#Intent;action=com.example.MY_ACTION;<br />i.some_int=100;S.some_str=hello;end</code></td>
4748 * <td><table border="" style="margin:0" >
4749 * <tr><td>Action: </td><td><code>com.example.MY_ACTION</code></td></tr>
4750 * <tr><td>Package: </td><td><code>com.example.app</code></td></tr>
4751 * <tr><td>Extras: </td><td><code>some_int=(int)100<br />some_str=(String)hello</code></td></tr>
4752 * </table></td>
4753 * </tr>
4754 * </tbody>
4755 * </table>
4756 */
4757 public static final int URI_ANDROID_APP_SCHEME = 1<<1;
URI_ALLOW_UNSAFE表明允许解析不安全的信息
4759 /**
4760 * Flag for use with {@link #toUri} and {@link #parseUri}: allow parsing
4761 * of unsafe information. In particular, the flags {@link #FLAG_GRANT_READ_URI_PERMISSION},
4762 * {@link #FLAG_GRANT_WRITE_URI_PERMISSION}, {@link #FLAG_GRANT_PERSISTABLE_URI_PERMISSION},
4763 * and {@link #FLAG_GRANT_PREFIX_URI_PERMISSION} flags can not be set, so that the
4764 * generated Intent can not cause unexpected data access to happen.
4765 *
4766 * <p>If you do not trust the source of the URI being parsed, you should still do further
4767 * processing to protect yourself from it. In particular, when using it to start an
4768 * activity you should usually add in {@link #CATEGORY_BROWSABLE} to limit the activities
4769 * that can handle it.</p>
4770 */
4771 public static final int URI_ALLOW_UNSAFE = 1<<2;
下边几个私有变量是Intent抽下的动作、数据、type、类别、extra、flags、对应组件、Intent seclector、clipdata、user、packange信息等内容，共12个
4775 private String mAction;
4776 private Uri mData;
4777 private String mType;
4778 private String mPackage;
4779 private ComponentName mComponent;
4780 private int mFlags;
4781 private ArraySet<String> mCategories;
4782 private Bundle mExtras;
4783 private Rect mSourceBounds;
4784 private Intent mSelector;
4785 private ClipData mClipData;
4786 private int mContentUserHint = UserHandle.USER_CURRENT;
下面看方法
构造函数与clone函数
4788 // ---------------------------------------------------------------------
4789
4790 /**
4791 * Create an empty intent.
4792 */
4793 public Intent() {
4794 }
4795
4796 /**
4797 * Copy constructor.
4798 */
4799 public Intent(Intent o) {
4800 this.mAction = o.mAction;
4801 this.mData = o.mData;
4802 this.mType = o.mType;
4803 this.mPackage = o.mPackage;
4804 this.mComponent = o.mComponent;
4805 this.mFlags = o.mFlags;
4806 this.mContentUserHint = o.mContentUserHint;
4807 if (o.mCategories != null) {
4808 this.mCategories = new ArraySet<String>(o.mCategories);
4809 }
4810 if (o.mExtras != null) {
4811 this.mExtras = new Bundle(o.mExtras);
4812 }
4813 if (o.mSourceBounds != null) {
4814 this.mSourceBounds = new Rect(o.mSourceBounds);
4815 }
4816 if (o.mSelector != null) {
4817 this.mSelector = new Intent(o.mSelector);
4818 }
4819 if (o.mClipData != null) {
4820 this.mClipData = new ClipData(o.mClipData);
4821 }
4822 }
4823
4824 @Override
4825 public Object clone() {
4826 return new Intent(this);
4827 }
4828
4829 private Intent(Intent o, boolean all) {
4830 this.mAction = o.mAction;
4831 this.mData = o.mData;
4832 this.mType = o.mType;
4833 this.mPackage = o.mPackage;
4834 this.mComponent = o.mComponent;
4835 if (o.mCategories != null) {
4836 this.mCategories = new ArraySet<String>(o.mCategories);
4837 }
4838 }
4839
4840 /**
4841 * Make a clone of only the parts of the Intent that are relevant for
4842 * filter matching: the action, data, type, component, and categories.
4843 */
4844 public Intent cloneFilter() {
4845 return new Intent(this, false);
4846 }
下边这几个构造函数初始化Intent的部分变量
4848 /**
4849 * Create an intent with a given action. All other fields (data, type,
4850 * class) are null. Note that the action <em>must</em> be in a
4851 * namespace because Intents are used globally in the system -- for
4852 * example the system VIEW action is android.intent.action.VIEW; an
4853 * application's custom action would be something like
4854 * com.google.app.myapp.CUSTOM_ACTION.
4855 *
4856 * @param action The Intent action, such as ACTION_VIEW.
4857 */
4858 public Intent(String action) {
4859 setAction(action);
4860 }
4861
4862 /**
4863 * Create an intent with a given action and for a given data url. Note
4864 * that the action <em>must</em> be in a namespace because Intents are
4865 * used globally in the system -- for example the system VIEW action is
4866 * android.intent.action.VIEW; an application's custom action would be
4867 * something like com.google.app.myapp.CUSTOM_ACTION.
4868 *
4869 * <p><em>Note: scheme and host name matching in the Android framework is
4870 * case-sensitive, unlike the formal RFC. As a result,
4871 * you should always ensure that you write your Uri with these elements
4872 * using lower case letters, and normalize any Uris you receive from
4873 * outside of Android to ensure the scheme and host is lower case.</em></p>
4874 *
4875 * @param action The Intent action, such as ACTION_VIEW.
4876 * @param uri The Intent data URI.
4877 */
4878 public Intent(String action, Uri uri) {
4879 setAction(action);
4880 mData = uri;
4881 }
4882
4883 /**
4884 * Create an intent for a specific component. All other fields (action, data,
4885 * type, class) are null, though they can be modified later with explicit
4886 * calls. This provides a convenient way to create an intent that is
4887 * intended to execute a hard-coded class name, rather than relying on the
4888 * system to find an appropriate class for you; see {@link #setComponent}
4889 * for more information on the repercussions of this.
4890 *
4891 * @param packageContext A Context of the application package implementing
4892 * this class.
4893 * @param cls The component class that is to be used for the intent.
4894 *
4895 * @see #setClass
4896 * @see #setComponent
4897 * @see #Intent(String, android.net.Uri , Context, Class)
4898 */
4899 public Intent(Context packageContext, Class<?> cls) {
4900 mComponent = new ComponentName(packageContext, cls);
4901 }
4902
4903 /**
4904 * Create an intent for a specific component with a specified action and data.
4905 * This is equivalent to using {@link #Intent(String, android.net.Uri)} to
4906 * construct the Intent and then calling {@link #setClass} to set its
4907 * class.
4908 *
4909 * <p><em>Note: scheme and host name matching in the Android framework is
4910 * case-sensitive, unlike the formal RFC. As a result,
4911 * you should always ensure that you write your Uri with these elements
4912 * using lower case letters, and normalize any Uris you receive from
4913 * outside of Android to ensure the scheme and host is lower case.</em></p>
4914 *
4915 * @param action The Intent action, such as ACTION_VIEW.
4916 * @param uri The Intent data URI.
4917 * @param packageContext A Context of the application package implementing
4918 * this class.
4919 * @param cls The component class that is to be used for the intent.
4920 *
4921 * @see #Intent(String, android.net.Uri)
4922 * @see #Intent(Context, Class)
4923 * @see #setClass
4924 * @see #setComponent
4925 */
4926 public Intent(String action, Uri uri,
4927 Context packageContext, Class<?> cls) {
4928 setAction(action);
4929 mData = uri;
4930 mComponent = new ComponentName(packageContext, cls);
4931 }
makeMainActivity制作一个action为ACTION_MAIN，category为CATEGORY_LAUNCHER的Intent，并指定组件名字
4933 /**
4934 * Create an intent to launch the main (root) activity of a task. This
4935 * is the Intent that is started when the application's is launched from
4936 * Home. For anything else that wants to launch an application in the
4937 * same way, it is important that they use an Intent structured the same
4938 * way, and can use this function to ensure this is the case.
4939 *
4940 * <p>The returned Intent has the given Activity component as its explicit
4941 * component, {@link #ACTION_MAIN} as its action, and includes the
4942 * category {@link #CATEGORY_LAUNCHER}. This does <em>not</em> have
4943 * {@link #FLAG_ACTIVITY_NEW_TASK} set, though typically you will want
4944 * to do that through {@link #addFlags(int)} on the returned Intent.
4945 *
4946 * @param mainActivity The main activity component that this Intent will
4947 * launch.
4948 * @return Returns a newly created Intent that can be used to launch the
4949 * activity as a main application entry.
4950 *
4951 * @see #setClass
4952 * @see #setComponent
4953 */
4954 public static Intent makeMainActivity(ComponentName mainActivity) {
4955 Intent intent = new Intent(ACTION_MAIN);
4956 intent.setComponent(mainActivity);
4957 intent.addCategory(CATEGORY_LAUNCHER);
4958 return intent;
4959 }
4960
makeMainSelectorActivity没有指定要启动的组件名，而是通过设置一个SelectorIntetn指定其selectorAction和seclectorCategory
4961 /**
4962 * Make an Intent for the main activity of an application, without
4963 * specifying a specific activity to run but giving a selector to find
4964 * the activity. This results in a final Intent that is structured
4965 * the same as when the application is launched from
4966 * Home. For anything else that wants to launch an application in the
4967 * same way, it is important that they use an Intent structured the same
4968 * way, and can use this function to ensure this is the case.
4969 *
4970 * <p>The returned Intent has {@link #ACTION_MAIN} as its action, and includes the
4971 * category {@link #CATEGORY_LAUNCHER}. This does <em>not</em> have
4972 * {@link #FLAG_ACTIVITY_NEW_TASK} set, though typically you will want
4973 * to do that through {@link #addFlags(int)} on the returned Intent.
4974 *
4975 * @param selectorAction The action name of the Intent's selector.
4976 * @param selectorCategory The name of a category to add to the Intent's
4977 * selector.
4978 * @return Returns a newly created Intent that can be used to launch the
4979 * activity as a main application entry.
4980 *
4981 * @see #setSelector(Intent)
4982 */
4983 public static Intent makeMainSelectorActivity(String selectorAction,
4984 String selectorCategory) {
4985 Intent intent = new Intent(ACTION_MAIN);
4986 intent.addCategory(CATEGORY_LAUNCHER);
4987 Intent selector = new Intent();
4988 selector.setAction(selectorAction);
4989 selector.addCategory(selectorCategory);
4990 intent.setSelector(selector);
4991 return intent;
4992 }
4993
makeRestartActivityTask表明建立一个新的task，并移除旧的task
4994 /**
4995 * Make an Intent that can be used to re-launch an application's task
4996 * in its base state. This is like {@link #makeMainActivity(ComponentName)},
4997 * but also sets the flags {@link #FLAG_ACTIVITY_NEW_TASK} and
4998 * {@link #FLAG_ACTIVITY_CLEAR_TASK}.
4999 *
5000 * @param mainActivity The activity component that is the root of the
5001 * task; this is the activity that has been published in the application's
5002 * manifest as the main launcher icon.
5003 *
5004 * @return Returns a newly created Intent that can be used to relaunch the
5005 * activity's task in its root state.
5006 */
5007 public static Intent makeRestartActivityTask(ComponentName mainActivity) {
5008 Intent intent = makeMainActivity(mainActivity);
5009 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
5010 | Intent.FLAG_ACTIVITY_CLEAR_TASK);
5011 return intent;
5012 }
5013
getIntent调用parseUri，解析传入的Uri
5014 /**
5015 * Call {@link #parseUri} with 0 flags.
5016 * @deprecated Use {@link #parseUri} instead.
5017 */
5018 @Deprecated
5019 public static Intent getIntent(String uri) throws URISyntaxException {
5020 return parseUri(uri, 0);
5021 }
parseUri把传入的Uri转换为一个Intent
5023 /**
5024 * Create an intent from a URI. This URI may encode the action,
5025 * category, and other intent fields, if it was returned by
5026 * {@link #toUri}. If the Intent was not generate by toUri(), its data
5027 * will be the entire URI and its action will be ACTION_VIEW.
5028 *
5029 * <p>The URI given here must not be relative -- that is, it must include
5030 * the scheme and full path.
5031 *
5032 * @param uri The URI to turn into an Intent.
5033 * @param flags Additional processing flags. Either 0,
5034 * {@link #URI_INTENT_SCHEME}, or {@link #URI_ANDROID_APP_SCHEME}.
5035 *
5036 * @return Intent The newly created Intent object.
5037 *
5038 * @throws URISyntaxException Throws URISyntaxError if the basic URI syntax
5039 * it bad (as parsed by the Uri class) or the Intent data within the
5040 * URI is invalid.
5041 *
5042 * @see #toUri
5043 */
5044 public static Intent parseUri(String uri, int flags) throws URISyntaxException {
5045 int i = 0;
5046 try {
5047 final boolean androidApp = uri.startsWith("android-app:");
5048
5049 // Validate intent scheme if requested.
5050 if ((flags&(URI_INTENT_SCHEME|URI_ANDROID_APP_SCHEME)) != 0) {
5051 if (!uri.startsWith("intent:") && !androidApp) {
5052 Intent intent = new Intent(ACTION_VIEW);
5053 try {
5054 intent.setData(Uri.parse(uri));
5055 } catch (IllegalArgumentException e) {
5056 throw new URISyntaxException(uri, e.getMessage());
5057 }
5058 return intent;
5059 }
5060 }
5061
5062 i = uri.lastIndexOf("#");
5063 // simple case
5064 if (i == -1) {
5065 if (!androidApp) {
5066 return new Intent(ACTION_VIEW, Uri.parse(uri));
5067 }
5068
5069 // old format Intent URI
5070 } else if (!uri.startsWith("#Intent;", i)) {
5071 if (!androidApp) {
5072 return getIntentOld(uri, flags);
5073 } else {
5074 i = -1;
5075 }
5076 }
5077
5078 // new format
5079 Intent intent = new Intent(ACTION_VIEW);
5080 Intent baseIntent = intent;
5081 boolean explicitAction = false;
5082 boolean inSelector = false;
5083
5084 // fetch data part, if present
5085 String scheme = null;
5086 String data;
5087 if (i >= 0) {
5088 data = uri.substring(0, i);
5089 i += 8; // length of "#Intent;"
5090 } else {
5091 data = uri;
5092 }
5093
5094 // loop over contents of Intent, all name=value;
5095 while (i >= 0 && !uri.startsWith("end", i)) {
5096 int eq = uri.indexOf('=', i);
5097 if (eq < 0) eq = i-1;
5098 int semi = uri.indexOf(';', i);
5099 String value = eq < semi ? Uri.decode(uri.substring(eq + 1, semi)) : "";
5100
5101 // action
5102 if (uri.startsWith("action=", i)) {
5103 intent.setAction(value);
5104 if (!inSelector) {
5105 explicitAction = true;
5106 }
5107 }
5108
5109 // categories
5110 else if (uri.startsWith("category=", i)) {
5111 intent.addCategory(value);
5112 }
5113
5114 // type
5115 else if (uri.startsWith("type=", i)) {
5116 intent.mType = value;
5117 }
5118
5119 // launch flags
5120 else if (uri.startsWith("launchFlags=", i)) {
5121 intent.mFlags = Integer.decode(value).intValue();
5122 if ((flags& URI_ALLOW_UNSAFE) == 0) {
5123 intent.mFlags &= ~IMMUTABLE_FLAGS;
5124 }
5125 }
5126
5127 // package
5128 else if (uri.startsWith("package=", i)) {
5129 intent.mPackage = value;
5130 }
5131
5132 // component
5133 else if (uri.startsWith("component=", i)) {
5134 intent.mComponent = ComponentName.unflattenFromString(value);
5135 }
5136
5137 // scheme
5138 else if (uri.startsWith("scheme=", i)) {
5139 if (inSelector) {
5140 intent.mData = Uri.parse(value + ":");
5141 } else {
5142 scheme = value;
5143 }
5144 }
5145
5146 // source bounds
5147 else if (uri.startsWith("sourceBounds=", i)) {
5148 intent.mSourceBounds = Rect.unflattenFromString(value);
5149 }
5150
5151 // selector
5152 else if (semi == (i+3) && uri.startsWith("SEL", i)) {
5153 intent = new Intent();
5154 inSelector = true;
5155 }
5156
5157 // extra
5158 else {
5159 String key = Uri.decode(uri.substring(i + 2, eq));
5160 // create Bundle if it doesn't already exist
5161 if (intent.mExtras == null) intent.mExtras = new Bundle();
5162 Bundle b = intent.mExtras;
5163 // add EXTRA
5164 if (uri.startsWith("S.", i)) b.putString(key, value);
5165 else if (uri.startsWith("B.", i)) b.putBoolean(key, Boolean.parseBoolean(value));
5166 else if (uri.startsWith("b.", i)) b.putByte(key, Byte.parseByte(value));
5167 else if (uri.startsWith("c.", i)) b.putChar(key, value.charAt(0));
5168 else if (uri.startsWith("d.", i)) b.putDouble(key, Double.parseDouble(value));
5169 else if (uri.startsWith("f.", i)) b.putFloat(key, Float.parseFloat(value));
5170 else if (uri.startsWith("i.", i)) b.putInt(key, Integer.parseInt(value));
5171 else if (uri.startsWith("l.", i)) b.putLong(key, Long.parseLong(value));
5172 else if (uri.startsWith("s.", i)) b.putShort(key, Short.parseShort(value));
5173 else throw new URISyntaxException(uri, "unknown EXTRA type", i);
5174 }
5175
5176 // move to the next item
5177 i = semi + 1;
5178 }
5179
5180 if (inSelector) {
5181 // The Intent had a selector; fix it up.
5182 if (baseIntent.mPackage == null) {
5183 baseIntent.setSelector(intent);
5184 }
5185 intent = baseIntent;
5186 }
5187
5188 if (data != null) {
5189 if (data.startsWith("intent:")) {
5190 data = data.substring(7);
5191 if (scheme != null) {
5192 data = scheme + ':' + data;
5193 }
5194 } else if (data.startsWith("android-app:")) {
5195 if (data.charAt(12) == '/' && data.charAt(13) == '/') {
5196 // Correctly formed android-app, first part is package name.
5197 int end = data.indexOf('/', 14);
5198 if (end < 0) {
5199 // All we have is a package name.
5200 intent.mPackage = data.substring(14);
5201 if (!explicitAction) {
5202 intent.setAction(ACTION_MAIN);
5203 }
5204 data = "";
5205 } else {
5206 // Target the Intent at the given package name always.
5207 String authority = null;
5208 intent.mPackage = data.substring(14, end);
5209 int newEnd;
5210 if ((end+1) < data.length()) {
5211 if ((newEnd=data.indexOf('/', end+1)) >= 0) {
5212 // Found a scheme, remember it.
5213 scheme = data.substring(end+1, newEnd);
5214 end = newEnd;
5215 if (end < data.length() && (newEnd=data.indexOf('/', end+1)) >= 0) {
5216 // Found a authority, remember it.
5217 authority = data.substring(end+1, newEnd);
5218 end = newEnd;
5219 }
5220 } else {
5221 // All we have is a scheme.
5222 scheme = data.substring(end+1);
5223 }
5224 }
5225 if (scheme == null) {
5226 // If there was no scheme, then this just targets the package.
5227 if (!explicitAction) {
5228 intent.setAction(ACTION_MAIN);
5229 }
5230 data = "";
5231 } else if (authority == null) {
5232 data = scheme + ":";
5233 } else {
5234 data = scheme + "://" + authority + data.substring(end);
5235 }
5236 }
5237 } else {
5238 data = "";
5239 }
5240 }
5241
5242 if (data.length() > 0) {
5243 try {
5244 intent.mData = Uri.parse(data);
5245 } catch (IllegalArgumentException e) {
5246 throw new URISyntaxException(uri, e.getMessage());
5247 }
5248 }
5249 }
5250
5251 return intent;
5252
5253 } catch (IndexOutOfBoundsException e) {
5254 throw new URISyntaxException(uri, "illegal Intent URI format", i);
5255 }
5256 }
getIntentOld解析旧的Uri格式
5258 public static Intent getIntentOld(String uri) throws URISyntaxException {
5259 return getIntentOld(uri, 0);
5260 }
5261
5262 private static Intent getIntentOld(String uri, int flags) throws URISyntaxException {
5263 Intent intent;
5264
5265 int i = uri.lastIndexOf('#');
5266 if (i >= 0) {
5267 String action = null;
5268 final int intentFragmentStart = i;
5269 boolean isIntentFragment = false;
5270
5271 i++;
5272
5273 if (uri.regionMatches(i, "action(", 0, 7)) {
5274 isIntentFragment = true;
5275 i += 7;
5276 int j = uri.indexOf(')', i);
5277 action = uri.substring(i, j);
5278 i = j + 1;
5279 }
5280
5281 intent = new Intent(action);
5282
5283 if (uri.regionMatches(i, "categories(", 0, 11)) {
5284 isIntentFragment = true;
5285 i += 11;
5286 int j = uri.indexOf(')', i);
5287 while (i < j) {
5288 int sep = uri.indexOf('!', i);
5289 if (sep < 0 || sep > j) sep = j;
5290 if (i < sep) {
5291 intent.addCategory(uri.substring(i, sep));
5292 }
5293 i = sep + 1;
5294 }
5295 i = j + 1;
5296 }
5297
5298 if (uri.regionMatches(i, "type(", 0, 5)) {
5299 isIntentFragment = true;
5300 i += 5;
5301 int j = uri.indexOf(')', i);
5302 intent.mType = uri.substring(i, j);
5303 i = j + 1;
5304 }
5305
5306 if (uri.regionMatches(i, "launchFlags(", 0, 12)) {
5307 isIntentFragment = true;
5308 i += 12;
5309 int j = uri.indexOf(')', i);
5310 intent.mFlags = Integer.decode(uri.substring(i, j)).intValue();
5311 if ((flags& URI_ALLOW_UNSAFE) == 0) {
5312 intent.mFlags &= ~IMMUTABLE_FLAGS;
5313 }
5314 i = j + 1;
5315 }
5316
5317 if (uri.regionMatches(i, "component(", 0, 10)) {
5318 isIntentFragment = true;
5319 i += 10;
5320 int j = uri.indexOf(')', i);
5321 int sep = uri.indexOf('!', i);
5322 if (sep >= 0 && sep < j) {
5323 String pkg = uri.substring(i, sep);
5324 String cls = uri.substring(sep + 1, j);
5325 intent.mComponent = new ComponentName(pkg, cls);
5326 }
5327 i = j + 1;
5328 }
5329
5330 if (uri.regionMatches(i, "extras(", 0, 7)) {
5331 isIntentFragment = true;
5332 i += 7;
5333
5334 final int closeParen = uri.indexOf(')', i);
5335 if (closeParen == -1) throw new URISyntaxException(uri,
5336 "EXTRA missing trailing ')'", i);
5337
5338 while (i < closeParen) {
5339 // fetch the key value
5340 int j = uri.indexOf('=', i);
5341 if (j <= i + 1 || i >= closeParen) {
5342 throw new URISyntaxException(uri, "EXTRA missing '='", i);
5343 }
5344 char type = uri.charAt(i);
5345 i++;
5346 String key = uri.substring(i, j);
5347 i = j + 1;
5348
5349 // get type-value
5350 j = uri.indexOf('!', i);
5351 if (j == -1 || j >= closeParen) j = closeParen;
5352 if (i >= j) throw new URISyntaxException(uri, "EXTRA missing '!'", i);
5353 String value = uri.substring(i, j);
5354 i = j;
5355
5356 // create Bundle if it doesn't already exist
5357 if (intent.mExtras == null) intent.mExtras = new Bundle();
5358
5359 // add item to bundle
5360 try {
5361 switch (type) {
5362 case 'S':
5363 intent.mExtras.putString(key, Uri.decode(value));
5364 break;
5365 case 'B':
5366 intent.mExtras.putBoolean(key, Boolean.parseBoolean(value));
5367 break;
5368 case 'b':
5369 intent.mExtras.putByte(key, Byte.parseByte(value));
5370 break;
5371 case 'c':
5372 intent.mExtras.putChar(key, Uri.decode(value).charAt(0));
5373 break;
5374 case 'd':
5375 intent.mExtras.putDouble(key, Double.parseDouble(value));
5376 break;
5377 case 'f':
5378 intent.mExtras.putFloat(key, Float.parseFloat(value));
5379 break;
5380 case 'i':
5381 intent.mExtras.putInt(key, Integer.parseInt(value));
5382 break;
5383 case 'l':
5384 intent.mExtras.putLong(key, Long.parseLong(value));
5385 break;
5386 case 's':
5387 intent.mExtras.putShort(key, Short.parseShort(value));
5388 break;
5389 default:
5390 throw new URISyntaxException(uri, "EXTRA has unknown type", i);
5391 }
5392 } catch (NumberFormatException e) {
5393 throw new URISyntaxException(uri, "EXTRA value can't be parsed", i);
5394 }
5395
5396 char ch = uri.charAt(i);
5397 if (ch == ')') break;
5398 if (ch != '!') throw new URISyntaxException(uri, "EXTRA missing '!'", i);
5399 i++;
5400 }
5401 }
5402
5403 if (isIntentFragment) {
5404 intent.mData = Uri.parse(uri.substring(0, intentFragmentStart));
5405 } else {
5406 intent.mData = Uri.parse(uri);
5407 }
5408
5409 if (intent.mAction == null) {
5410 // By default, if no action is specified, then use VIEW.
5411 intent.mAction = ACTION_VIEW;
5412 }
5413
5414 } else {
5415 intent = new Intent(ACTION_VIEW, Uri.parse(uri));
5416 }
5417
5418 return intent;
5419 }
5420
内部接口CommandOptionHanlder有一个函数handleOption
5421 /** @hide */
5422 public interface CommandOptionHandler {
5423 boolean handleOption(String opt, ShellCommand cmd);
5424 }
5425
parseCommnadArgs解析shellcommand
5426 /** @hide */
5427 public static Intent parseCommandArgs(ShellCommand cmd, CommandOptionHandler optionHandler)
5428 throws URISyntaxException {
5429 Intent intent = new Intent();
5430 Intent baseIntent = intent;
5431 boolean hasIntentInfo = false;
5432
5433 Uri data = null;
5434 String type = null;
5435
5436 String opt;
5437 while ((opt=cmd.getNextOption()) != null) {
5438 switch (opt) {
5439 case "-a":
5440 intent.setAction(cmd.getNextArgRequired());
5441 if (intent == baseIntent) {
5442 hasIntentInfo = true;
5443 }
5444 break;
5445 case "-d":
5446 data = Uri.parse(cmd.getNextArgRequired());
5447 if (intent == baseIntent) {
5448 hasIntentInfo = true;
5449 }
5450 break;
5451 case "-t":
5452 type = cmd.getNextArgRequired();
5453 if (intent == baseIntent) {
5454 hasIntentInfo = true;
5455 }
5456 break;
5457 case "-c":
5458 intent.addCategory(cmd.getNextArgRequired());
5459 if (intent == baseIntent) {
5460 hasIntentInfo = true;
5461 }
5462 break;
5463 case "-e":
5464 case "--es": {
5465 String key = cmd.getNextArgRequired();
5466 String value = cmd.getNextArgRequired();
5467 intent.putExtra(key, value);
5468 }
5469 break;
5470 case "--esn": {
5471 String key = cmd.getNextArgRequired();
5472 intent.putExtra(key, (String) null);
5473 }
5474 break;
5475 case "--ei": {
5476 String key = cmd.getNextArgRequired();
5477 String value = cmd.getNextArgRequired();
5478 intent.putExtra(key, Integer.decode(value));
5479 }
5480 break;
5481 case "--eu": {
5482 String key = cmd.getNextArgRequired();
5483 String value = cmd.getNextArgRequired();
5484 intent.putExtra(key, Uri.parse(value));
5485 }
5486 break;
5487 case "--ecn": {
5488 String key = cmd.getNextArgRequired();
5489 String value = cmd.getNextArgRequired();
5490 ComponentName cn = ComponentName.unflattenFromString(value);
5491 if (cn == null)
5492 throw new IllegalArgumentException("Bad component name: " + value);
5493 intent.putExtra(key, cn);
5494 }
5495 break;
5496 case "--eia": {
5497 String key = cmd.getNextArgRequired();
5498 String value = cmd.getNextArgRequired();
5499 String[] strings = value.split(",");
5500 int[] list = new int[strings.length];
5501 for (int i = 0; i < strings.length; i++) {
5502 list[i] = Integer.decode(strings[i]);
5503 }
5504 intent.putExtra(key, list);
5505 }
5506 break;
5507 case "--eial": {
5508 String key = cmd.getNextArgRequired();
5509 String value = cmd.getNextArgRequired();
5510 String[] strings = value.split(",");
5511 ArrayList<Integer> list = new ArrayList<>(strings.length);
5512 for (int i = 0; i < strings.length; i++) {
5513 list.add(Integer.decode(strings[i]));
5514 }
5515 intent.putExtra(key, list);
5516 }
5517 break;
5518 case "--el": {
5519 String key = cmd.getNextArgRequired();
5520 String value = cmd.getNextArgRequired();
5521 intent.putExtra(key, Long.valueOf(value));
5522 }
5523 break;
5524 case "--ela": {
5525 String key = cmd.getNextArgRequired();
5526 String value = cmd.getNextArgRequired();
5527 String[] strings = value.split(",");
5528 long[] list = new long[strings.length];
5529 for (int i = 0; i < strings.length; i++) {
5530 list[i] = Long.valueOf(strings[i]);
5531 }
5532 intent.putExtra(key, list);
5533 hasIntentInfo = true;
5534 }
5535 break;
5536 case "--elal": {
5537 String key = cmd.getNextArgRequired();
5538 String value = cmd.getNextArgRequired();
5539 String[] strings = value.split(",");
5540 ArrayList<Long> list = new ArrayList<>(strings.length);
5541 for (int i = 0; i < strings.length; i++) {
5542 list.add(Long.valueOf(strings[i]));
5543 }
5544 intent.putExtra(key, list);
5545 hasIntentInfo = true;
5546 }
5547 break;
5548 case "--ef": {
5549 String key = cmd.getNextArgRequired();
5550 String value = cmd.getNextArgRequired();
5551 intent.putExtra(key, Float.valueOf(value));
5552 hasIntentInfo = true;
5553 }
5554 break;
5555 case "--efa": {
5556 String key = cmd.getNextArgRequired();
5557 String value = cmd.getNextArgRequired();
5558 String[] strings = value.split(",");
5559 float[] list = new float[strings.length];
5560 for (int i = 0; i < strings.length; i++) {
5561 list[i] = Float.valueOf(strings[i]);
5562 }
5563 intent.putExtra(key, list);
5564 hasIntentInfo = true;
5565 }
5566 break;
5567 case "--efal": {
5568 String key = cmd.getNextArgRequired();
5569 String value = cmd.getNextArgRequired();
5570 String[] strings = value.split(",");
5571 ArrayList<Float> list = new ArrayList<>(strings.length);
5572 for (int i = 0; i < strings.length; i++) {
5573 list.add(Float.valueOf(strings[i]));
5574 }
5575 intent.putExtra(key, list);
5576 hasIntentInfo = true;
5577 }
5578 break;
5579 case "--esa": {
5580 String key = cmd.getNextArgRequired();
5581 String value = cmd.getNextArgRequired();
5582 // Split on commas unless they are preceeded by an escape.
5583 // The escape character must be escaped for the string and
5584 // again for the regex, thus four escape characters become one.
5585 String[] strings = value.split("(?<!\\\\),");
5586 intent.putExtra(key, strings);
5587 hasIntentInfo = true;
5588 }
5589 break;
5590 case "--esal": {
5591 String key = cmd.getNextArgRequired();
5592 String value = cmd.getNextArgRequired();
5593 // Split on commas unless they are preceeded by an escape.
5594 // The escape character must be escaped for the string and
5595 // again for the regex, thus four escape characters become one.
5596 String[] strings = value.split("(?<!\\\\),");
5597 ArrayList<String> list = new ArrayList<>(strings.length);
5598 for (int i = 0; i < strings.length; i++) {
5599 list.add(strings[i]);
5600 }
5601 intent.putExtra(key, list);
5602 hasIntentInfo = true;
5603 }
5604 break;
5605 case "--ez": {
5606 String key = cmd.getNextArgRequired();
5607 String value = cmd.getNextArgRequired().toLowerCase();
5608 // Boolean.valueOf() results in false for anything that is not "true", which is
5609 // error-prone in shell commands
5610 boolean arg;
5611 if ("true".equals(value) || "t".equals(value)) {
5612 arg = true;
5613 } else if ("false".equals(value) || "f".equals(value)) {
5614 arg = false;
5615 } else {
5616 try {
5617 arg = Integer.decode(value) != 0;
5618 } catch (NumberFormatException ex) {
5619 throw new IllegalArgumentException("Invalid boolean value: " + value);
5620 }
5621 }
5622
5623 intent.putExtra(key, arg);
5624 }
5625 break;
5626 case "-n": {
5627 String str = cmd.getNextArgRequired();
5628 ComponentName cn = ComponentName.unflattenFromString(str);
5629 if (cn == null)
5630 throw new IllegalArgumentException("Bad component name: " + str);
5631 intent.setComponent(cn);
5632 if (intent == baseIntent) {
5633 hasIntentInfo = true;
5634 }
5635 }
5636 break;
5637 case "-p": {
5638 String str = cmd.getNextArgRequired();
5639 intent.setPackage(str);
5640 if (intent == baseIntent) {
5641 hasIntentInfo = true;
5642 }
5643 }
5644 break;
5645 case "-f":
5646 String str = cmd.getNextArgRequired();
5647 intent.setFlags(Integer.decode(str).intValue());
5648 break;
5649 case "--grant-read-uri-permission":
5650 intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
5651 break;
5652 case "--grant-write-uri-permission":
5653 intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
5654 break;
5655 case "--grant-persistable-uri-permission":
5656 intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
5657 break;
5658 case "--grant-prefix-uri-permission":
5659 intent.addFlags(Intent.FLAG_GRANT_PREFIX_URI_PERMISSION);
5660 break;
5661 case "--exclude-stopped-packages":
5662 intent.addFlags(Intent.FLAG_EXCLUDE_STOPPED_PACKAGES);
5663 break;
5664 case "--include-stopped-packages":
5665 intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
5666 break;
5667 case "--debug-log-resolution":
5668 intent.addFlags(Intent.FLAG_DEBUG_LOG_RESOLUTION);
5669 break;
5670 case "--activity-brought-to-front":
5671 intent.addFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
5672 break;
5673 case "--activity-clear-top":
5674 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
5675 break;
5676 case "--activity-clear-when-task-reset":
5677 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
5678 break;
5679 case "--activity-exclude-from-recents":
5680 intent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
5681 break;
5682 case "--activity-launched-from-history":
5683 intent.addFlags(Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY);
5684 break;
5685 case "--activity-multiple-task":
5686 intent.addFlags(Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
5687 break;
5688 case "--activity-no-animation":
5689 intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
5690 break;
5691 case "--activity-no-history":
5692 intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
5693 break;
5694 case "--activity-no-user-action":
5695 intent.addFlags(Intent.FLAG_ACTIVITY_NO_USER_ACTION);
5696 break;
5697 case "--activity-previous-is-top":
5698 intent.addFlags(Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP);
5699 break;
5700 case "--activity-reorder-to-front":
5701 intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
5702 break;
5703 case "--activity-reset-task-if-needed":
5704 intent.addFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
5705 break;
5706 case "--activity-single-top":
5707 intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
5708 break;
5709 case "--activity-clear-task":
5710 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
5711 break;
5712 case "--activity-task-on-home":
5713 intent.addFlags(Intent.FLAG_ACTIVITY_TASK_ON_HOME);
5714 break;
5715 case "--receiver-registered-only":
5716 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
5717 break;
5718 case "--receiver-replace-pending":
5719 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
5720 break;
5721 case "--receiver-foreground":
5722 intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
5723 break;
5724 case "--selector":
5725 intent.setDataAndType(data, type);
5726 intent = new Intent();
5727 break;
5728 default:
5729 if (optionHandler != null && optionHandler.handleOption(opt, cmd)) {
5730 // Okay, caller handled this option.
5731 } else {
5732 throw new IllegalArgumentException("Unknown option: " + opt);
5733 }
5734 break;
5735 }
5736 }
5737 intent.setDataAndType(data, type);
5738
5739 final boolean hasSelector = intent != baseIntent;
5740 if (hasSelector) {
5741 // A selector was specified; fix up.
5742 baseIntent.setSelector(intent);
5743 intent = baseIntent;
5744 }
5745
5746 String arg = cmd.getNextArg();
5747 baseIntent = null;
5748 if (arg == null) {
5749 if (hasSelector) {
5750 // If a selector has been specified, and no arguments
5751 // have been supplied for the main Intent, then we can
5752 // assume it is ACTION_MAIN CATEGORY_LAUNCHER; we don't
5753 // need to have a component name specified yet, the
5754 // selector will take care of that.
5755 baseIntent = new Intent(Intent.ACTION_MAIN);
5756 baseIntent.addCategory(Intent.CATEGORY_LAUNCHER);
5757 }
5758 } else if (arg.indexOf(':') >= 0) {
5759 // The argument is a URI. Fully parse it, and use that result
5760 // to fill in any data not specified so far.
5761 baseIntent = Intent.parseUri(arg, Intent.URI_INTENT_SCHEME
5762 | Intent.URI_ANDROID_APP_SCHEME | Intent.URI_ALLOW_UNSAFE);
5763 } else if (arg.indexOf('/') >= 0) {
5764 // The argument is a component name. Build an Intent to launch
5765 // it.
5766 baseIntent = new Intent(Intent.ACTION_MAIN);
5767 baseIntent.addCategory(Intent.CATEGORY_LAUNCHER);
5768 baseIntent.setComponent(ComponentName.unflattenFromString(arg));
5769 } else {
5770 // Assume the argument is a package name.
5771 baseIntent = new Intent(Intent.ACTION_MAIN);
5772 baseIntent.addCategory(Intent.CATEGORY_LAUNCHER);
5773 baseIntent.setPackage(arg);
5774 }
5775 if (baseIntent != null) {
5776 Bundle extras = intent.getExtras();
5777 intent.replaceExtras((Bundle)null);
5778 Bundle uriExtras = baseIntent.getExtras();
5779 baseIntent.replaceExtras((Bundle)null);
5780 if (intent.getAction() != null && baseIntent.getCategories() != null) {
5781 HashSet<String> cats = new HashSet<String>(baseIntent.getCategories());
5782 for (String c : cats) {
5783 baseIntent.removeCategory(c);
5784 }
5785 }
5786 intent.fillIn(baseIntent, Intent.FILL_IN_COMPONENT | Intent.FILL_IN_SELECTOR);
5787 if (extras == null) {
5788 extras = uriExtras;
5789 } else if (uriExtras != null) {
5790 uriExtras.putAll(extras);
5791 extras = uriExtras;
5792 }
5793 intent.replaceExtras(extras);
5794 hasIntentInfo = true;
5795 }
5796
5797 if (!hasIntentInfo) throw new IllegalArgumentException("No intent supplied");
5798 return intent;
5799 }
5800
printIntentArgsHelp打印命令的选项和参数帮助
5801 /** @hide */
5802 public static void printIntentArgsHelp(PrintWriter pw, String prefix) {
5803 final String[] lines = new String[] {
5804 "<INTENT> specifications include these flags and arguments:",
5805 " [-a <ACTION>] [-d <DATA_URI>] [-t <MIME_TYPE>]",
5806 " [-c <CATEGORY> [-c <CATEGORY>] ...]",
5807 " [-e|--es <EXTRA_KEY> <EXTRA_STRING_VALUE> ...]",
5808 " [--esn <EXTRA_KEY> ...]",
5809 " [--ez <EXTRA_KEY> <EXTRA_BOOLEAN_VALUE> ...]",
5810 " [--ei <EXTRA_KEY> <EXTRA_INT_VALUE> ...]",
5811 " [--el <EXTRA_KEY> <EXTRA_LONG_VALUE> ...]",
5812 " [--ef <EXTRA_KEY> <EXTRA_FLOAT_VALUE> ...]",
5813 " [--eu <EXTRA_KEY> <EXTRA_URI_VALUE> ...]",
5814 " [--ecn <EXTRA_KEY> <EXTRA_COMPONENT_NAME_VALUE>]",
5815 " [--eia <EXTRA_KEY> <EXTRA_INT_VALUE>[,<EXTRA_INT_VALUE...]]",
5816 " (mutiple extras passed as Integer[])",
5817 " [--eial <EXTRA_KEY> <EXTRA_INT_VALUE>[,<EXTRA_INT_VALUE...]]",
5818 " (mutiple extras passed as List<Integer>)",
5819 " [--ela <EXTRA_KEY> <EXTRA_LONG_VALUE>[,<EXTRA_LONG_VALUE...]]",
5820 " (mutiple extras passed as Long[])",
5821 " [--elal <EXTRA_KEY> <EXTRA_LONG_VALUE>[,<EXTRA_LONG_VALUE...]]",
5822 " (mutiple extras passed as List<Long>)",
5823 " [--efa <EXTRA_KEY> <EXTRA_FLOAT_VALUE>[,<EXTRA_FLOAT_VALUE...]]",
5824 " (mutiple extras passed as Float[])",
5825 " [--efal <EXTRA_KEY> <EXTRA_FLOAT_VALUE>[,<EXTRA_FLOAT_VALUE...]]",
5826 " (mutiple extras passed as List<Float>)",
5827 " [--esa <EXTRA_KEY> <EXTRA_STRING_VALUE>[,<EXTRA_STRING_VALUE...]]",
5828 " (mutiple extras passed as String[]; to embed a comma into a string,",
5829 " escape it using \"\\,\")",
5830 " [--esal <EXTRA_KEY> <EXTRA_STRING_VALUE>[,<EXTRA_STRING_VALUE...]]",
5831 " (mutiple extras passed as List<String>; to embed a comma into a string,",
5832 " escape it using \"\\,\")",
5833 " [--f <FLAG>]",
5834 " [--grant-read-uri-permission] [--grant-write-uri-permission]",
5835 " [--grant-persistable-uri-permission] [--grant-prefix-uri-permission]",
5836 " [--debug-log-resolution] [--exclude-stopped-packages]",
5837 " [--include-stopped-packages]",
5838 " [--activity-brought-to-front] [--activity-clear-top]",
5839 " [--activity-clear-when-task-reset] [--activity-exclude-from-recents]",
5840 " [--activity-launched-from-history] [--activity-multiple-task]",
5841 " [--activity-no-animation] [--activity-no-history]",
5842 " [--activity-no-user-action] [--activity-previous-is-top]",
5843 " [--activity-reorder-to-front] [--activity-reset-task-if-needed]",
5844 " [--activity-single-top] [--activity-clear-task]",
5845 " [--activity-task-on-home]",
5846 " [--receiver-registered-only] [--receiver-replace-pending]",
5847 " [--receiver-foreground]",
5848 " [--selector]",
5849 " [<URI> | <PACKAGE> | <COMPONENT>]"
5850 };
5851 for (String line : lines) {
5852 pw.print(prefix);
5853 pw.println(line);
5854 }
5855 }
5856
函数getAction返回action
5857 /**
5858 * Retrieve the general action to be performed, such as
5859 * {@link #ACTION_VIEW}. The action describes the general way the rest of
5860 * the information in the intent should be interpreted -- most importantly,
5861 * what to do with the data returned by {@link #getData}.
5862 *
5863 * @return The action of this intent or null if none is specified.
5864 *
5865 * @see #setAction
5866 */
5867 public String getAction() {
5868 return mAction;
5869 }
getData返回data
5871 /**
5872 * Retrieve data this intent is operating on. This URI specifies the name
5873 * of the data; often it uses the content: scheme, specifying data in a
5874 * content provider. Other schemes may be handled by specific activities,
5875 * such as http: by the web browser.
5876 *
5877 * @return The URI of the data this intent is targeting or null.
5878 *
5879 * @see #getScheme
5880 * @see #setData
5881 */
5882 public Uri getData() {
5883 return mData;
5884 }
getDataString把Uri类转换为string
5886 /**
5887 * The same as {@link #getData()}, but returns the URI as an encoded
5888 * String.
5889 */
5890 public String getDataString() {
5891 return mData != null ? mData.toString() : null;
5892 }
getDataScheme返回协议名
5894 /**
5895 * Return the scheme portion of the intent's data. If the data is null or
5896 * does not include a scheme, null is returned. Otherwise, the scheme
5897 * prefix without the final ':' is returned, i.e. "http".
5898 *
5899 * <p>This is the same as calling getData().getScheme() (and checking for
5900 * null data).
5901 *
5902 * @return The scheme of this intent.
5903 *
5904 * @see #getData
5905 */
5906 public String getScheme() {
5907 return mData != null ? mData.getScheme() : null;
5908 }
getType返回MIME type
5910 /**
5911 * Retrieve any explicit MIME type included in the intent. This is usually
5912 * null, as the type is determined by the intent data.
5913 *
5914 * @return If a type was manually set, it is returned; else null is
5915 * returned.
5916 *
5917 * @see #resolveType(ContentResolver)
5918 * @see #setType
5919 */
5920 public String getType() {
5921 return mType;
5922 }
resolveType和resolveTypeIfNeeded会返回当前的MIME type，让ContentResolver根据mData来做
5924 /**
5925 * Return the MIME data type of this intent. If the type field is
5926 * explicitly set, that is simply returned. Otherwise, if the data is set,
5927 * the type of that data is returned. If neither fields are set, a null is
5928 * returned.
5929 *
5930 * @return The MIME type of this intent.
5931 *
5932 * @see #getType
5933 * @see #resolveType(ContentResolver)
5934 */
5935 public String resolveType(Context context) {
5936 return resolveType(context.getContentResolver());
5937 }
5938
5939 /**
5940 * Return the MIME data type of this intent. If the type field is
5941 * explicitly set, that is simply returned. Otherwise, if the data is set,
5942 * the type of that data is returned. If neither fields are set, a null is
5943 * returned.
5944 *
5945 * @param resolver A ContentResolver that can be used to determine the MIME
5946 * type of the intent's data.
5947 *
5948 * @return The MIME type of this intent.
5949 *
5950 * @see #getType
5951 * @see #resolveType(Context)
5952 */
5953 public String resolveType(ContentResolver resolver) {
5954 if (mType != null) {
5955 return mType;
5956 }
5957 if (mData != null) {
5958 if ("content".equals(mData.getScheme())) {
5959 return resolver.getType(mData);
5960 }
5961 }
5962 return null;
5963 }
5964
5965 /**
5966 * Return the MIME data type of this intent, only if it will be needed for
5967 * intent resolution. This is not generally useful for application code;
5968 * it is used by the frameworks for communicating with back-end system
5969 * services.
5970 *
5971 * @param resolver A ContentResolver that can be used to determine the MIME
5972 * type of the intent's data.
5973 *
5974 * @return The MIME type of this intent, or null if it is unknown or not
5975 * needed.
5976 */
5977 public String resolveTypeIfNeeded(ContentResolver resolver) {
5978 if (mComponent != null) {
5979 return mType;
5980 }
5981 return resolveType(resolver);
5982 }
hasCategory和getCategories判断是否包含某个category和返回categories
5984 /**
5985 * Check if a category exists in the intent.
5986 *
5987 * @param category The category to check.
5988 *
5989 * @return boolean True if the intent contains the category, else false.
5990 *
5991 * @see #getCategories
5992 * @see #addCategory
5993 */
5994 public boolean hasCategory(String category) {
5995 return mCategories != null && mCategories.contains(category);
5996 }
5997
5998 /**
5999 * Return the set of all categories in the intent. If there are no categories,
6000 * returns NULL.
6001 *
6002 * @return The set of categories you can examine. Do not modify!
6003 *
6004 * @see #hasCategory
6005 * @see #addCategory
6006 */
6007 public Set<String> getCategories() {
6008 return mCategories;
6009 }
getSelector获取mSelector
6011 /**
6012 * Return the specific selector associated with this Intent. If there is
6013 * none, returns null. See {@link #setSelector} for more information.
6014 *
6015 * @see #setSelector
6016 */
6017 public Intent getSelector() {
6018 return mSelector;
6019 }
getClipData返回mClipData
6021 /**
6022 * Return the {@link ClipData} associated with this Intent. If there is
6023 * none, returns null. See {@link #setClipData} for more information.
6024 *
6025 * @see #setClipData
6026 */
6027 public ClipData getClipData() {
6028 return mClipData;
6029 }
getContentUserHint返回mContentUserHint
6031 /** @hide */
6032 public int getContentUserHint() {
6033 return mContentUserHint;
6034 }
setExtrasClassloader设置mExtras的ClassLoader
6036 /**
6037 * Sets the ClassLoader that will be used when unmarshalling
6038 * any Parcelable values from the extras of this Intent.
6039 *
6040 * @param loader a ClassLoader, or null to use the default loader
6041 * at the time of unmarshalling.
6042 */
6043 public void setExtrasClassLoader(ClassLoader loader) {
6044 if (mExtras != null) {
6045 mExtras.setClassLoader(loader);
6046 }
6047 }
hasExtra和hasFileDescriptors调用Bundle的containsKey和hasFileDescriptros
6049 /**
6050 * Returns true if an extra value is associated with the given name.
6051 * @param name the extra's name
6052 * @return true if the given extra is present.
6053 */
6054 public boolean hasExtra(String name) {
6055 return mExtras != null && mExtras.containsKey(name);
6056 }
6057
6058 /**
6059 * Returns true if the Intent's extras contain a parcelled file descriptor.
6060 * @return true if the Intent contains a parcelled file descriptor.
6061 */
6062 public boolean hasFileDescriptors() {
6063 return mExtras != null && mExtras.hasFileDescriptors();
6064 }
setAllowFds和setDefusable调用Bunde的setAllowFds和setDefusable
6066 /** {@hide} */
6067 public void setAllowFds(boolean allowFds) {
6068 if (mExtras != null) {
6069 mExtras.setAllowFds(allowFds);
6070 }
6071 }
6072
6073 /** {@hide} */
6074 public void setDefusable(boolean defusable) {
6075 if (mExtras != null) {
6076 mExtras.setDefusable(defusable);
6077 }
6078 }
6079
getExtra返回Object对象， 没找到返回参数里的默认值
6530 /**
6531 * Retrieve extended data from the intent.
6532 *
6533 * @param name The name of the desired item.
6534 * @param defaultValue The default value to return in case no item is
6535 * associated with the key 'name'
6536 *
6537 * @return the value of an item that previously added with putExtra()
6538 * or defaultValue if none was found.
6539 *
6540 * @see #putExtra
6541 *
6542 * @deprecated
6543 * @hide
6544 */
6545 @Deprecated
6546 public Object getExtra(String name, Object defaultValue) {
6547 Object result = defaultValue;
6548 if (mExtras != null) {
6549 Object result2 = mExtras.get(name);
6550 if (result2 != null) {
6551 result = result2;
6552 }
6553 }
6554
6555 return result;
6556 }
还有一个默认值为NULL的版本
6080 /**
6081 * Retrieve extended data from the intent.
6082 *
6083 * @param name The name of the desired item.
6084 *
6085 * @return the value of an item that previously added with putExtra()
6086 * or null if none was found.
6087 *
6088 * @deprecated
6089 * @hide
6090 */
6091 @Deprecated
6092 public Object getExtra(String name) {
6093 return getExtra(name, null);
6094 }
getBooleanExtra,getByteExtra,getShortExtra,getCharExtra,getIntExtra,getLongExtra,getFloatExtra,getDoubleExtra,getStringExtra,getCharSequenceExtra,getParcelableExtra,getParcelableArrayExtra,getParcelableArrayListExtra,getSeriableExtra,getIntegerArrayListExtra,getStringArrayListExtra,getCharSequenceArrayList,getBooleanArrayExtra,getByteArrayExtra,getShortArrayExtra,getIntArrayExtra,getLongArrayExtra,getFloatArrayExtra,getDoubleArrayExtra,getStrignArrayExtra,getCharSequenceArrayExtra,getBundleExtra,getIBinderExtra分别调用Bundle的相应方法
6096 /**
6097 * Retrieve extended data from the intent.
6098 *
6099 * @param name The name of the desired item.
6100 * @param defaultValue the value to be returned if no value of the desired
6101 * type is stored with the given name.
6102 *
6103 * @return the value of an item that previously added with putExtra()
6104 * or the default value if none was found.
6105 *
6106 * @see #putExtra(String, boolean)
6107 */
6108 public boolean getBooleanExtra(String name, boolean defaultValue) {
6109 return mExtras == null ? defaultValue :
6110 mExtras.getBoolean(name, defaultValue);
6111 }
6112
6113 /**
6114 * Retrieve extended data from the intent.
6115 *
6116 * @param name The name of the desired item.
6117 * @param defaultValue the value to be returned if no value of the desired
6118 * type is stored with the given name.
6119 *
6120 * @return the value of an item that previously added with putExtra()
6121 * or the default value if none was found.
6122 *
6123 * @see #putExtra(String, byte)
6124 */
6125 public byte getByteExtra(String name, byte defaultValue) {
6126 return mExtras == null ? defaultValue :
6127 mExtras.getByte(name, defaultValue);
6128 }
6129
6130 /**
6131 * Retrieve extended data from the intent.
6132 *
6133 * @param name The name of the desired item.
6134 * @param defaultValue the value to be returned if no value of the desired
6135 * type is stored with the given name.
6136 *
6137 * @return the value of an item that previously added with putExtra()
6138 * or the default value if none was found.
6139 *
6140 * @see #putExtra(String, short)
6141 */
6142 public short getShortExtra(String name, short defaultValue) {
6143 return mExtras == null ? defaultValue :
6144 mExtras.getShort(name, defaultValue);
6145 }
6146
6147 /**
6148 * Retrieve extended data from the intent.
6149 *
6150 * @param name The name of the desired item.
6151 * @param defaultValue the value to be returned if no value of the desired
6152 * type is stored with the given name.
6153 *
6154 * @return the value of an item that previously added with putExtra()
6155 * or the default value if none was found.
6156 *
6157 * @see #putExtra(String, char)
6158 */
6159 public char getCharExtra(String name, char defaultValue) {
6160 return mExtras == null ? defaultValue :
6161 mExtras.getChar(name, defaultValue);
6162 }
6163
6164 /**
6165 * Retrieve extended data from the intent.
6166 *
6167 * @param name The name of the desired item.
6168 * @param defaultValue the value to be returned if no value of the desired
6169 * type is stored with the given name.
6170 *
6171 * @return the value of an item that previously added with putExtra()
6172 * or the default value if none was found.
6173 *
6174 * @see #putExtra(String, int)
6175 */
6176 public int getIntExtra(String name, int defaultValue) {
6177 return mExtras == null ? defaultValue :
6178 mExtras.getInt(name, defaultValue);
6179 }
6180
6181 /**
6182 * Retrieve extended data from the intent.
6183 *
6184 * @param name The name of the desired item.
6185 * @param defaultValue the value to be returned if no value of the desired
6186 * type is stored with the given name.
6187 *
6188 * @return the value of an item that previously added with putExtra()
6189 * or the default value if none was found.
6190 *
6191 * @see #putExtra(String, long)
6192 */
6193 public long getLongExtra(String name, long defaultValue) {
6194 return mExtras == null ? defaultValue :
6195 mExtras.getLong(name, defaultValue);
6196 }
6197
6198 /**
6199 * Retrieve extended data from the intent.
6200 *
6201 * @param name The name of the desired item.
6202 * @param defaultValue the value to be returned if no value of the desired
6203 * type is stored with the given name.
6204 *
6205 * @return the value of an item that previously added with putExtra(),
6206 * or the default value if no such item is present
6207 *
6208 * @see #putExtra(String, float)
6209 */
6210 public float getFloatExtra(String name, float defaultValue) {
6211 return mExtras == null ? defaultValue :
6212 mExtras.getFloat(name, defaultValue);
6213 }
6214
6215 /**
6216 * Retrieve extended data from the intent.
6217 *
6218 * @param name The name of the desired item.
6219 * @param defaultValue the value to be returned if no value of the desired
6220 * type is stored with the given name.
6221 *
6222 * @return the value of an item that previously added with putExtra()
6223 * or the default value if none was found.
6224 *
6225 * @see #putExtra(String, double)
6226 */
6227 public double getDoubleExtra(String name, double defaultValue) {
6228 return mExtras == null ? defaultValue :
6229 mExtras.getDouble(name, defaultValue);
6230 }
6231
6232 /**
6233 * Retrieve extended data from the intent.
6234 *
6235 * @param name The name of the desired item.
6236 *
6237 * @return the value of an item that previously added with putExtra()
6238 * or null if no String value was found.
6239 *
6240 * @see #putExtra(String, String)
6241 */
6242 public String getStringExtra(String name) {
6243 return mExtras == null ? null : mExtras.getString(name);
6244 }
6245
6246 /**
6247 * Retrieve extended data from the intent.
6248 *
6249 * @param name The name of the desired item.
6250 *
6251 * @return the value of an item that previously added with putExtra()
6252 * or null if no CharSequence value was found.
6253 *
6254 * @see #putExtra(String, CharSequence)
6255 */
6256 public CharSequence getCharSequenceExtra(String name) {
6257 return mExtras == null ? null : mExtras.getCharSequence(name);
6258 }
6259
6260 /**
6261 * Retrieve extended data from the intent.
6262 *
6263 * @param name The name of the desired item.
6264 *
6265 * @return the value of an item that previously added with putExtra()
6266 * or null if no Parcelable value was found.
6267 *
6268 * @see #putExtra(String, Parcelable)
6269 */
6270 public <T extends Parcelable> T getParcelableExtra(String name) {
6271 return mExtras == null ? null : mExtras.<T>getParcelable(name);
6272 }
6273
6274 /**
6275 * Retrieve extended data from the intent.
6276 *
6277 * @param name The name of the desired item.
6278 *
6279 * @return the value of an item that previously added with putExtra()
6280 * or null if no Parcelable[] value was found.
6281 *
6282 * @see #putExtra(String, Parcelable[])
6283 */
6284 public Parcelable[] getParcelableArrayExtra(String name) {
6285 return mExtras == null ? null : mExtras.getParcelableArray(name);
6286 }
6287
6288 /**
6289 * Retrieve extended data from the intent.
6290 *
6291 * @param name The name of the desired item.
6292 *
6293 * @return the value of an item that previously added with putExtra()
6294 * or null if no ArrayList<Parcelable> value was found.
6295 *
6296 * @see #putParcelableArrayListExtra(String, ArrayList)
6297 */
6298 public <T extends Parcelable> ArrayList<T> getParcelableArrayListExtra(String name) {
6299 return mExtras == null ? null : mExtras.<T>getParcelableArrayList(name);
6300 }
6301
6302 /**
6303 * Retrieve extended data from the intent.
6304 *
6305 * @param name The name of the desired item.
6306 *
6307 * @return the value of an item that previously added with putExtra()
6308 * or null if no Serializable value was found.
6309 *
6310 * @see #putExtra(String, Serializable)
6311 */
6312 public Serializable getSerializableExtra(String name) {
6313 return mExtras == null ? null : mExtras.getSerializable(name);
6314 }
6315
6316 /**
6317 * Retrieve extended data from the intent.
6318 *
6319 * @param name The name of the desired item.
6320 *
6321 * @return the value of an item that previously added with putExtra()
6322 * or null if no ArrayList<Integer> value was found.
6323 *
6324 * @see #putIntegerArrayListExtra(String, ArrayList)
6325 */
6326 public ArrayList<Integer> getIntegerArrayListExtra(String name) {
6327 return mExtras == null ? null : mExtras.getIntegerArrayList(name);
6328 }
6329
6330 /**
6331 * Retrieve extended data from the intent.
6332 *
6333 * @param name The name of the desired item.
6334 *
6335 * @return the value of an item that previously added with putExtra()
6336 * or null if no ArrayList<String> value was found.
6337 *
6338 * @see #putStringArrayListExtra(String, ArrayList)
6339 */
6340 public ArrayList<String> getStringArrayListExtra(String name) {
6341 return mExtras == null ? null : mExtras.getStringArrayList(name);
6342 }
6343
6344 /**
6345 * Retrieve extended data from the intent.
6346 *
6347 * @param name The name of the desired item.
6348 *
6349 * @return the value of an item that previously added with putExtra()
6350 * or null if no ArrayList<CharSequence> value was found.
6351 *
6352 * @see #putCharSequenceArrayListExtra(String, ArrayList)
6353 */
6354 public ArrayList<CharSequence> getCharSequenceArrayListExtra(String name) {
6355 return mExtras == null ? null : mExtras.getCharSequenceArrayList(name);
6356 }
6357
6358 /**
6359 * Retrieve extended data from the intent.
6360 *
6361 * @param name The name of the desired item.
6362 *
6363 * @return the value of an item that previously added with putExtra()
6364 * or null if no boolean array value was found.
6365 *
6366 * @see #putExtra(String, boolean[])
6367 */
6368 public boolean[] getBooleanArrayExtra(String name) {
6369 return mExtras == null ? null : mExtras.getBooleanArray(name);
6370 }
6371
6372 /**
6373 * Retrieve extended data from the intent.
6374 *
6375 * @param name The name of the desired item.
6376 *
6377 * @return the value of an item that previously added with putExtra()
6378 * or null if no byte array value was found.
6379 *
6380 * @see #putExtra(String, byte[])
6381 */
6382 public byte[] getByteArrayExtra(String name) {
6383 return mExtras == null ? null : mExtras.getByteArray(name);
6384 }
6385
6386 /**
6387 * Retrieve extended data from the intent.
6388 *
6389 * @param name The name of the desired item.
6390 *
6391 * @return the value of an item that previously added with putExtra()
6392 * or null if no short array value was found.
6393 *
6394 * @see #putExtra(String, short[])
6395 */
6396 public short[] getShortArrayExtra(String name) {
6397 return mExtras == null ? null : mExtras.getShortArray(name);
6398 }
6399
6400 /**
6401 * Retrieve extended data from the intent.
6402 *
6403 * @param name The name of the desired item.
6404 *
6405 * @return the value of an item that previously added with putExtra()
6406 * or null if no char array value was found.
6407 *
6408 * @see #putExtra(String, char[])
6409 */
6410 public char[] getCharArrayExtra(String name) {
6411 return mExtras == null ? null : mExtras.getCharArray(name);
6412 }
6413
6414 /**
6415 * Retrieve extended data from the intent.
6416 *
6417 * @param name The name of the desired item.
6418 *
6419 * @return the value of an item that previously added with putExtra()
6420 * or null if no int array value was found.
6421 *
6422 * @see #putExtra(String, int[])
6423 */
6424 public int[] getIntArrayExtra(String name) {
6425 return mExtras == null ? null : mExtras.getIntArray(name);
6426 }
6427
6428 /**
6429 * Retrieve extended data from the intent.
6430 *
6431 * @param name The name of the desired item.
6432 *
6433 * @return the value of an item that previously added with putExtra()
6434 * or null if no long array value was found.
6435 *
6436 * @see #putExtra(String, long[])
6437 */
6438 public long[] getLongArrayExtra(String name) {
6439 return mExtras == null ? null : mExtras.getLongArray(name);
6440 }
6441
6442 /**
6443 * Retrieve extended data from the intent.
6444 *
6445 * @param name The name of the desired item.
6446 *
6447 * @return the value of an item that previously added with putExtra()
6448 * or null if no float array value was found.
6449 *
6450 * @see #putExtra(String, float[])
6451 */
6452 public float[] getFloatArrayExtra(String name) {
6453 return mExtras == null ? null : mExtras.getFloatArray(name);
6454 }
6455
6456 /**
6457 * Retrieve extended data from the intent.
6458 *
6459 * @param name The name of the desired item.
6460 *
6461 * @return the value of an item that previously added with putExtra()
6462 * or null if no double array value was found.
6463 *
6464 * @see #putExtra(String, double[])
6465 */
6466 public double[] getDoubleArrayExtra(String name) {
6467 return mExtras == null ? null : mExtras.getDoubleArray(name);
6468 }
6469
6470 /**
6471 * Retrieve extended data from the intent.
6472 *
6473 * @param name The name of the desired item.
6474 *
6475 * @return the value of an item that previously added with putExtra()
6476 * or null if no String array value was found.
6477 *
6478 * @see #putExtra(String, String[])
6479 */
6480 public String[] getStringArrayExtra(String name) {
6481 return mExtras == null ? null : mExtras.getStringArray(name);
6482 }
6483
6484 /**
6485 * Retrieve extended data from the intent.
6486 *
6487 * @param name The name of the desired item.
6488 *
6489 * @return the value of an item that previously added with putExtra()
6490 * or null if no CharSequence array value was found.
6491 *
6492 * @see #putExtra(String, CharSequence[])
6493 */
6494 public CharSequence[] getCharSequenceArrayExtra(String name) {
6495 return mExtras == null ? null : mExtras.getCharSequenceArray(name);
6496 }
6497
6498 /**
6499 * Retrieve extended data from the intent.
6500 *
6501 * @param name The name of the desired item.
6502 *
6503 * @return the value of an item that previously added with putExtra()
6504 * or null if no Bundle value was found.
6505 *
6506 * @see #putExtra(String, Bundle)
6507 */
6508 public Bundle getBundleExtra(String name) {
6509 return mExtras == null ? null : mExtras.getBundle(name);
6510 }
6511
6512 /**
6513 * Retrieve extended data from the intent.
6514 *
6515 * @param name The name of the desired item.
6516 *
6517 * @return the value of an item that previously added with putExtra()
6518 * or null if no IBinder value was found.
6519 *
6520 * @see #putExtra(String, IBinder)
6521 *
6522 * @deprecated
6523 * @hide
6524 */
6525 @Deprecated
6526 public IBinder getIBinderExtra(String name) {
6527 return mExtras == null ? null : mExtras.getIBinder(name);
6528 }
6529
getExtras copy一个新的mExtras
6558 /**
6559 * Retrieves a map of extended data from the intent.
6560 *
6561 * @return the map of all extras previously added with putExtra(),
6562 * or null if none have been added.
6563 */
6564 public Bundle getExtras() {
6565 return (mExtras != null)
6566 ? new Bundle(mExtras)
6567 : null;
6568 }
6569
removeUnsafeExtras会只保留基本类型
6570 /**
6571 * Filter extras to only basic types.
6572 * @hide
6573 */
6574 public void removeUnsafeExtras() {
6575 if (mExtras != null) {
6576 mExtras = mExtras.filterValues();
6577 }
6578 }
getFlags获取当前的flag
6580 /**
6581 * Retrieve any special flags associated with this intent. You will
6582 * normally just set them with {@link #setFlags} and let the system
6583 * take the appropriate action with them.
6584 *
6585 * @return int The currently set flags.
6586 *
6587 * @see #setFlags
6588 */
6589 public int getFlags() {
6590 return mFlags;
6591 }
isExcludingStopped看看相应的flag是否为FLAG_EXCLUDE_STOPPED_PACKAGES。
6593 /** @hide */
6594 public boolean isExcludingStopped() {
6595 return (mFlags&(FLAG_EXCLUDE_STOPPED_PACKAGES|FLAG_INCLUDE_STOPPED_PACKAGES))
6596 == FLAG_EXCLUDE_STOPPED_PACKAGES;
6597 }
getPackage,getComponent,getSourceBounds返回相应的私有变量
6599 /**
6600 * Retrieve the application package name this Intent is limited to. When
6601 * resolving an Intent, if non-null this limits the resolution to only
6602 * components in the given application package.
6603 *
6604 * @return The name of the application package for the Intent.
6605 *
6606 * @see #resolveActivity
6607 * @see #setPackage
6608 */
6609 public String getPackage() {
6610 return mPackage;
6611 }
6612
6613 /**
6614 * Retrieve the concrete component associated with the intent. When receiving
6615 * an intent, this is the component that was found to best handle it (that is,
6616 * yourself) and will always be non-null; in all other cases it will be
6617 * null unless explicitly set.
6618 *
6619 * @return The name of the application component to handle the intent.
6620 *
6621 * @see #resolveActivity
6622 * @see #setComponent
6623 */
6624 public ComponentName getComponent() {
6625 return mComponent;
6626 }
6627
6628 /**
6629 * Get the bounds of the sender of this intent, in screen coordinates. This can be
6630 * used as a hint to the receiver for animations and the like. Null means that there
6631 * is no source bounds.
6632 */
6633 public Rect getSourceBounds() {
6634 return mSourceBounds;
6635 }
6636
resolveActivity返回mComponent或者通过PackageManager返回相应组件
6637 /**
6638 * Return the Activity component that should be used to handle this intent.
6639 * The appropriate component is determined based on the information in the
6640 * intent, evaluated as follows:
6641 *
6642 * <p>If {@link #getComponent} returns an explicit class, that is returned
6643 * without any further consideration.
6644 *
6645 * <p>The activity must handle the {@link Intent#CATEGORY_DEFAULT} Intent
6646 * category to be considered.
6647 *
6648 * <p>If {@link #getAction} is non-NULL, the activity must handle this
6649 * action.
6650 *
6651 * <p>If {@link #resolveType} returns non-NULL, the activity must handle
6652 * this type.
6653 *
6654 * <p>If {@link #addCategory} has added any categories, the activity must
6655 * handle ALL of the categories specified.
6656 *
6657 * <p>If {@link #getPackage} is non-NULL, only activity components in
6658 * that application package will be considered.
6659 *
6660 * <p>If there are no activities that satisfy all of these conditions, a
6661 * null string is returned.
6662 *
6663 * <p>If multiple activities are found to satisfy the intent, the one with
6664 * the highest priority will be used. If there are multiple activities
6665 * with the same priority, the system will either pick the best activity
6666 * based on user preference, or resolve to a system class that will allow
6667 * the user to pick an activity and forward from there.
6668 *
6669 * <p>This method is implemented simply by calling
6670 * {@link PackageManager#resolveActivity} with the "defaultOnly" parameter
6671 * true.</p>
6672 * <p> This API is called for you as part of starting an activity from an
6673 * intent. You do not normally need to call it yourself.</p>
6674 *
6675 * @param pm The package manager with which to resolve the Intent.
6676 *
6677 * @return Name of the component implementing an activity that can
6678 * display the intent.
6679 *
6680 * @see #setComponent
6681 * @see #getComponent
6682 * @see #resolveActivityInfo
6683 */
6684 public ComponentName resolveActivity(PackageManager pm) {
6685 if (mComponent != null) {
6686 return mComponent;
6687 }
6688
6689 ResolveInfo info = pm.resolveActivity(
6690 this, PackageManager.MATCH_DEFAULT_ONLY);
6691 if (info != null) {
6692 return new ComponentName(
6693 info.activityInfo.applicationInfo.packageName,
6694 info.activityInfo.name);
6695 }
6696
6697 return null;
6698 }
resolveActivityInfo通过pm获取ActivityInfo
6700 /**
6701 * Resolve the Intent into an {@link ActivityInfo}
6702 * describing the activity that should execute the intent. Resolution
6703 * follows the same rules as described for {@link #resolveActivity}, but
6704 * you get back the completely information about the resolved activity
6705 * instead of just its class name.
6706 *
6707 * @param pm The package manager with which to resolve the Intent.
6708 * @param flags Addition information to retrieve as per
6709 * {@link PackageManager#getActivityInfo(ComponentName, int)
6710 * PackageManager.getActivityInfo()}.
6711 *
6712 * @return PackageManager.ActivityInfo
6713 *
6714 * @see #resolveActivity
6715 */
6716 public ActivityInfo resolveActivityInfo(PackageManager pm, int flags) {
6717 ActivityInfo ai = null;
6718 if (mComponent != null) {
6719 try {
6720 ai = pm.getActivityInfo(mComponent, flags);
6721 } catch (PackageManager.NameNotFoundException e) {
6722 // ignore
6723 }
6724 } else {
6725 ResolveInfo info = pm.resolveActivity(
6726 this, PackageManager.MATCH_DEFAULT_ONLY | flags);
6727 if (info != null) {
6728 ai = info.activityInfo;
6729 }
6730 }
6731
6732 return ai;
6733 }
resolveSystemService通过pm的queryIntentService找到Intent匹配的servcie，如果有多个匹配，直接抛异常
6735 /**
6736 * Special function for use by the system to resolve service
6737 * intents to system apps. Throws an exception if there are
6738 * multiple potential matches to the Intent. Returns null if
6739 * there are no matches.
6740 * @hide
6741 */
6742 public ComponentName resolveSystemService(PackageManager pm, int flags) {
6743 if (mComponent != null) {
6744 return mComponent;
6745 }
6746
6747 List<ResolveInfo> results = pm.queryIntentServices(this, flags);
6748 if (results == null) {
6749 return null;
6750 }
6751 ComponentName comp = null;
6752 for (int i=0; i<results.size(); i++) {
6753 ResolveInfo ri = results.get(i);
6754 if ((ri.serviceInfo.applicationInfo.flags&ApplicationInfo.FLAG_SYSTEM) == 0) {
6755 continue;
6756 }
6757 ComponentName foundComp = new ComponentName(ri.serviceInfo.applicationInfo.packageName,
6758 ri.serviceInfo.name);
6759 if (comp != null) {
6760 throw new IllegalStateException("Multiple system services handle " + this
6761 + ": " + comp + ", " + foundComp);
6762 }
6763 comp = foundComp;
6764 }
6765 return comp;
6766 }
6767
setAction设置action，mAction是String.intern获取常量池里的引用这样就不用动态构建了，加快处理速度
6768 /**
6769 * Set the general action to be performed.
6770 *
6771 * @param action An action name, such as ACTION_VIEW. Application-specific
6772 * actions should be prefixed with the vendor's package name.
6773 *
6774 * @return Returns the same Intent object, for chaining multiple calls
6775 * into a single statement.
6776 *
6777 * @see #getAction
6778 */
6779 public Intent setAction(String action) {
6780 mAction = action != null ? action.intern() : null;
6781 return this;
6782 }
setData,setType一系列函数会在设置data或者type的时候清除另一个，或者先将其转换为小写
6784 /**
6785 * Set the data this intent is operating on. This method automatically
6786 * clears any type that was previously set by {@link #setType} or
6787 * {@link #setTypeAndNormalize}.
6788 *
6789 * <p><em>Note: scheme matching in the Android framework is
6790 * case-sensitive, unlike the formal RFC. As a result,
6791 * you should always write your Uri with a lower case scheme,
6792 * or use {@link Uri#normalizeScheme} or
6793 * {@link #setDataAndNormalize}
6794 * to ensure that the scheme is converted to lower case.</em>
6795 *
6796 * @param data The Uri of the data this intent is now targeting.
6797 *
6798 * @return Returns the same Intent object, for chaining multiple calls
6799 * into a single statement.
6800 *
6801 * @see #getData
6802 * @see #setDataAndNormalize
6803 * @see android.net.Uri#normalizeScheme()
6804 */
6805 public Intent setData(Uri data) {
6806 mData = data;
6807 mType = null;
6808 return this;
6809 }
6810
6811 /**
6812 * Normalize and set the data this intent is operating on.
6813 *
6814 * <p>This method automatically clears any type that was
6815 * previously set (for example, by {@link #setType}).
6816 *
6817 * <p>The data Uri is normalized using
6818 * {@link android.net.Uri#normalizeScheme} before it is set,
6819 * so really this is just a convenience method for
6820 * <pre>
6821 * setData(data.normalize())
6822 * </pre>
6823 *
6824 * @param data The Uri of the data this intent is now targeting.
6825 *
6826 * @return Returns the same Intent object, for chaining multiple calls
6827 * into a single statement.
6828 *
6829 * @see #getData
6830 * @see #setType
6831 * @see android.net.Uri#normalizeScheme
6832 */
6833 public Intent setDataAndNormalize(Uri data) {
6834 return setData(data.normalizeScheme());
6835 }
6836
6837 /**
6838 * Set an explicit MIME data type.
6839 *
6840 * <p>This is used to create intents that only specify a type and not data,
6841 * for example to indicate the type of data to return.
6842 *
6843 * <p>This method automatically clears any data that was
6844 * previously set (for example by {@link #setData}).
6845 *
6846 * <p><em>Note: MIME type matching in the Android framework is
6847 * case-sensitive, unlike formal RFC MIME types. As a result,
6848 * you should always write your MIME types with lower case letters,
6849 * or use {@link #normalizeMimeType} or {@link #setTypeAndNormalize}
6850 * to ensure that it is converted to lower case.</em>
6851 *
6852 * @param type The MIME type of the data being handled by this intent.
6853 *
6854 * @return Returns the same Intent object, for chaining multiple calls
6855 * into a single statement.
6856 *
6857 * @see #getType
6858 * @see #setTypeAndNormalize
6859 * @see #setDataAndType
6860 * @see #normalizeMimeType
6861 */
6862 public Intent setType(String type) {
6863 mData = null;
6864 mType = type;
6865 return this;
6866 }
6867
6868 /**
6869 * Normalize and set an explicit MIME data type.
6870 *
6871 * <p>This is used to create intents that only specify a type and not data,
6872 * for example to indicate the type of data to return.
6873 *
6874 * <p>This method automatically clears any data that was
6875 * previously set (for example by {@link #setData}).
6876 *
6877 * <p>The MIME type is normalized using
6878 * {@link #normalizeMimeType} before it is set,
6879 * so really this is just a convenience method for
6880 * <pre>
6881 * setType(Intent.normalizeMimeType(type))
6882 * </pre>
6883 *
6884 * @param type The MIME type of the data being handled by this intent.
6885 *
6886 * @return Returns the same Intent object, for chaining multiple calls
6887 * into a single statement.
6888 *
6889 * @see #getType
6890 * @see #setData
6891 * @see #normalizeMimeType
6892 */
6893 public Intent setTypeAndNormalize(String type) {
6894 return setType(normalizeMimeType(type));
6895 }
6896
6897 /**
6898 * (Usually optional) Set the data for the intent along with an explicit
6899 * MIME data type. This method should very rarely be used -- it allows you
6900 * to override the MIME type that would ordinarily be inferred from the
6901 * data with your own type given here.
6902 *
6903 * <p><em>Note: MIME type and Uri scheme matching in the
6904 * Android framework is case-sensitive, unlike the formal RFC definitions.
6905 * As a result, you should always write these elements with lower case letters,
6906 * or use {@link #normalizeMimeType} or {@link android.net.Uri#normalizeScheme} or
6907 * {@link #setDataAndTypeAndNormalize}
6908 * to ensure that they are converted to lower case.</em>
6909 *
6910 * @param data The Uri of the data this intent is now targeting.
6911 * @param type The MIME type of the data being handled by this intent.
6912 *
6913 * @return Returns the same Intent object, for chaining multiple calls
6914 * into a single statement.
6915 *
6916 * @see #setType
6917 * @see #setData
6918 * @see #normalizeMimeType
6919 * @see android.net.Uri#normalizeScheme
6920 * @see #setDataAndTypeAndNormalize
6921 */
6922 public Intent setDataAndType(Uri data, String type) {
6923 mData = data;
6924 mType = type;
6925 return this;
6926 }
6927
6928 /**
6929 * (Usually optional) Normalize and set both the data Uri and an explicit
6930 * MIME data type. This method should very rarely be used -- it allows you
6931 * to override the MIME type that would ordinarily be inferred from the
6932 * data with your own type given here.
6933 *
6934 * <p>The data Uri and the MIME type are normalize using
6935 * {@link android.net.Uri#normalizeScheme} and {@link #normalizeMimeType}
6936 * before they are set, so really this is just a convenience method for
6937 * <pre>
6938 * setDataAndType(data.normalize(), Intent.normalizeMimeType(type))
6939 * </pre>
6940 *
6941 * @param data The Uri of the data this intent is now targeting.
6942 * @param type The MIME type of the data being handled by this intent.
6943 *
6944 * @return Returns the same Intent object, for chaining multiple calls
6945 * into a single statement.
6946 *
6947 * @see #setType
6948 * @see #setData
6949 * @see #setDataAndType
6950 * @see #normalizeMimeType
6951 * @see android.net.Uri#normalizeScheme
6952 */
6953 public Intent setDataAndTypeAndNormalize(Uri data, String type) {
6954 return setDataAndType(data.normalizeScheme(), normalizeMimeType(type));
6955 }
addCategory和removeCategory增加和删除Category
6957 /**
6958 * Add a new category to the intent. Categories provide additional detail
6959 * about the action the intent performs. When resolving an intent, only
6960 * activities that provide <em>all</em> of the requested categories will be
6961 * used.
6962 *
6963 * @param category The desired category. This can be either one of the
6964 * predefined Intent categories, or a custom category in your own
6965 * namespace.
6966 *
6967 * @return Returns the same Intent object, for chaining multiple calls
6968 * into a single statement.
6969 *
6970 * @see #hasCategory
6971 * @see #removeCategory
6972 */
6973 public Intent addCategory(String category) {
6974 if (mCategories == null) {
6975 mCategories = new ArraySet<String>();
6976 }
6977 mCategories.add(category.intern());
6978 return this;
6979 }
6980
6981 /**
6982 * Remove a category from an intent.
6983 *
6984 * @param category The category to remove.
6985 *
6986 * @see #addCategory
6987 */
6988 public void removeCategory(String category) {
6989 if (mCategories != null) {
6990 mCategories.remove(category);
6991 if (mCategories.size() == 0) {
6992 mCategories = null;
6993 }
6994 }
6995 }
6996
setSelector设置一个额外的Intent，决定哪个组件处理它
6997 /**
6998 * Set a selector for this Intent. This is a modification to the kinds of
6999 * things the Intent will match. If the selector is set, it will be used
7000 * when trying to find entities that can handle the Intent, instead of the
7001 * main contents of the Intent. This allows you build an Intent containing
7002 * a generic protocol while targeting it more specifically.
7003 *
7004 * <p>An example of where this may be used is with things like
7005 * {@link #CATEGORY_APP_BROWSER}. This category allows you to build an
7006 * Intent that will launch the Browser application. However, the correct
7007 * main entry point of an application is actually {@link #ACTION_MAIN}
7008 * {@link #CATEGORY_LAUNCHER} with {@link #setComponent(ComponentName)}
7009 * used to specify the actual Activity to launch. If you launch the browser
7010 * with something different, undesired behavior may happen if the user has
7011 * previously or later launches it the normal way, since they do not match.
7012 * Instead, you can build an Intent with the MAIN action (but no ComponentName
7013 * yet specified) and set a selector with {@link #ACTION_MAIN} and
7014 * {@link #CATEGORY_APP_BROWSER} to point it specifically to the browser activity.
7015 *
7016 * <p>Setting a selector does not impact the behavior of
7017 * {@link #filterEquals(Intent)} and {@link #filterHashCode()}. This is part of the
7018 * desired behavior of a selector -- it does not impact the base meaning
7019 * of the Intent, just what kinds of things will be matched against it
7020 * when determining who can handle it.</p>
7021 *
7022 * <p>You can not use both a selector and {@link #setPackage(String)} on
7023 * the same base Intent.</p>
7024 *
7025 * @param selector The desired selector Intent; set to null to not use
7026 * a special selector.
7027 */
7028 public void setSelector(Intent selector) {
7029 if (selector == this) {
7030 throw new IllegalArgumentException(
7031 "Intent being set as a selector of itself");
7032 }
7033 if (selector != null && mPackage != null) {
7034 throw new IllegalArgumentException(
7035 "Can't set selector when package name is already set");
7036 }
7037 mSelector = selector;
7038 }
setClipData设置clipData
7040 /**
7041 * Set a {@link ClipData} associated with this Intent. This replaces any
7042 * previously set ClipData.
7043 *
7044 * <p>The ClipData in an intent is not used for Intent matching or other
7045 * such operations. Semantically it is like extras, used to transmit
7046 * additional data with the Intent. The main feature of using this over
7047 * the extras for data is that {@link #FLAG_GRANT_READ_URI_PERMISSION}
7048 * and {@link #FLAG_GRANT_WRITE_URI_PERMISSION} will operate on any URI
7049 * items included in the clip data. This is useful, in particular, if
7050 * you want to transmit an Intent containing multiple <code>content:</code>
7051 * URIs for which the recipient may not have global permission to access the
7052 * content provider.
7053 *
7054 * <p>If the ClipData contains items that are themselves Intents, any
7055 * grant flags in those Intents will be ignored. Only the top-level flags
7056 * of the main Intent are respected, and will be applied to all Uri or
7057 * Intent items in the clip (or sub-items of the clip).
7058 *
7059 * <p>The MIME type, label, and icon in the ClipData object are not
7060 * directly used by Intent. Applications should generally rely on the
7061 * MIME type of the Intent itself, not what it may find in the ClipData.
7062 * A common practice is to construct a ClipData for use with an Intent
7063 * with a MIME type of "*/*".
7064 *
7065 * @param clip The new clip to set. May be null to clear the current clip.
7066 */
7067 public void setClipData(ClipData clip) {
7068 mClipData = clip;
7069 }
prepareToLeaveUser切换userId
7071 /**
7072 * This is NOT a secure mechanism to identify the user who sent the intent.
7073 * When the intent is sent to a different user, it is used to fix uris by adding the userId
7074 * who sent the intent.
7075 * @hide
7076 */
7077 public void prepareToLeaveUser(int userId) {
7078 // If mContentUserHint is not UserHandle.USER_CURRENT, the intent has already left a user.
7079 // We want mContentUserHint to refer to the original user, so don't do anything.
7080 if (mContentUserHint == UserHandle.USER_CURRENT) {
7081 mContentUserHint = userId;
7082 }
7083 }
putExtra的重载函数，根据参数类型不同调用调用Bundle的不同函数放不同类型
7085 /**
7086 * Add extended data to the intent. The name must include a package
7087 * prefix, for example the app com.android.contacts would use names
7088 * like "com.android.contacts.ShowAll".
7089 *
7090 * @param name The name of the extra data, with package prefix.
7091 * @param value The boolean data value.
7092 *
7093 * @return Returns the same Intent object, for chaining multiple calls
7094 * into a single statement.
7095 *
7096 * @see #putExtras
7097 * @see #removeExtra
7098 * @see #getBooleanExtra(String, boolean)
7099 */
7100 public Intent putExtra(String name, boolean value) {
7101 if (mExtras == null) {
7102 mExtras = new Bundle();
7103 }
7104 mExtras.putBoolean(name, value);
7105 return this;
7106 }
7107
7108 /**
7109 * Add extended data to the intent. The name must include a package
7110 * prefix, for example the app com.android.contacts would use names
7111 * like "com.android.contacts.ShowAll".
7112 *
7113 * @param name The name of the extra data, with package prefix.
7114 * @param value The byte data value.
7115 *
7116 * @return Returns the same Intent object, for chaining multiple calls
7117 * into a single statement.
7118 *
7119 * @see #putExtras
7120 * @see #removeExtra
7121 * @see #getByteExtra(String, byte)
7122 */
7123 public Intent putExtra(String name, byte value) {
7124 if (mExtras == null) {
7125 mExtras = new Bundle();
7126 }
7127 mExtras.putByte(name, value);
7128 return this;
7129 }
7130
7131 /**
7132 * Add extended data to the intent. The name must include a package
7133 * prefix, for example the app com.android.contacts would use names
7134 * like "com.android.contacts.ShowAll".
7135 *
7136 * @param name The name of the extra data, with package prefix.
7137 * @param value The char data value.
7138 *
7139 * @return Returns the same Intent object, for chaining multiple calls
7140 * into a single statement.
7141 *
7142 * @see #putExtras
7143 * @see #removeExtra
7144 * @see #getCharExtra(String, char)
7145 */
7146 public Intent putExtra(String name, char value) {
7147 if (mExtras == null) {
7148 mExtras = new Bundle();
7149 }
7150 mExtras.putChar(name, value);
7151 return this;
7152 }
7153
7154 /**
7155 * Add extended data to the intent. The name must include a package
7156 * prefix, for example the app com.android.contacts would use names
7157 * like "com.android.contacts.ShowAll".
7158 *
7159 * @param name The name of the extra data, with package prefix.
7160 * @param value The short data value.
7161 *
7162 * @return Returns the same Intent object, for chaining multiple calls
7163 * into a single statement.
7164 *
7165 * @see #putExtras
7166 * @see #removeExtra
7167 * @see #getShortExtra(String, short)
7168 */
7169 public Intent putExtra(String name, short value) {
7170 if (mExtras == null) {
7171 mExtras = new Bundle();
7172 }
7173 mExtras.putShort(name, value);
7174 return this;
7175 }
7176
7177 /**
7178 * Add extended data to the intent. The name must include a package
7179 * prefix, for example the app com.android.contacts would use names
7180 * like "com.android.contacts.ShowAll".
7181 *
7182 * @param name The name of the extra data, with package prefix.
7183 * @param value The integer data value.
7184 *
7185 * @return Returns the same Intent object, for chaining multiple calls
7186 * into a single statement.
7187 *
7188 * @see #putExtras
7189 * @see #removeExtra
7190 * @see #getIntExtra(String, int)
7191 */
7192 public Intent putExtra(String name, int value) {
7193 if (mExtras == null) {
7194 mExtras = new Bundle();
7195 }
7196 mExtras.putInt(name, value);
7197 return this;
7198 }
7199
7200 /**
7201 * Add extended data to the intent. The name must include a package
7202 * prefix, for example the app com.android.contacts would use names
7203 * like "com.android.contacts.ShowAll".
7204 *
7205 * @param name The name of the extra data, with package prefix.
7206 * @param value The long data value.
7207 *
7208 * @return Returns the same Intent object, for chaining multiple calls
7209 * into a single statement.
7210 *
7211 * @see #putExtras
7212 * @see #removeExtra
7213 * @see #getLongExtra(String, long)
7214 */
7215 public Intent putExtra(String name, long value) {
7216 if (mExtras == null) {
7217 mExtras = new Bundle();
7218 }
7219 mExtras.putLong(name, value);
7220 return this;
7221 }
7222
7223 /**
7224 * Add extended data to the intent. The name must include a package
7225 * prefix, for example the app com.android.contacts would use names
7226 * like "com.android.contacts.ShowAll".
7227 *
7228 * @param name The name of the extra data, with package prefix.
7229 * @param value The float data value.
7230 *
7231 * @return Returns the same Intent object, for chaining multiple calls
7232 * into a single statement.
7233 *
7234 * @see #putExtras
7235 * @see #removeExtra
7236 * @see #getFloatExtra(String, float)
7237 */
7238 public Intent putExtra(String name, float value) {
7239 if (mExtras == null) {
7240 mExtras = new Bundle();
7241 }
7242 mExtras.putFloat(name, value);
7243 return this;
7244 }
7245
7246 /**
7247 * Add extended data to the intent. The name must include a package
7248 * prefix, for example the app com.android.contacts would use names
7249 * like "com.android.contacts.ShowAll".
7250 *
7251 * @param name The name of the extra data, with package prefix.
7252 * @param value The double data value.
7253 *
7254 * @return Returns the same Intent object, for chaining multiple calls
7255 * into a single statement.
7256 *
7257 * @see #putExtras
7258 * @see #removeExtra
7259 * @see #getDoubleExtra(String, double)
7260 */
7261 public Intent putExtra(String name, double value) {
7262 if (mExtras == null) {
7263 mExtras = new Bundle();
7264 }
7265 mExtras.putDouble(name, value);
7266 return this;
7267 }
7268
7269 /**
7270 * Add extended data to the intent. The name must include a package
7271 * prefix, for example the app com.android.contacts would use names
7272 * like "com.android.contacts.ShowAll".
7273 *
7274 * @param name The name of the extra data, with package prefix.
7275 * @param value The String data value.
7276 *
7277 * @return Returns the same Intent object, for chaining multiple calls
7278 * into a single statement.
7279 *
7280 * @see #putExtras
7281 * @see #removeExtra
7282 * @see #getStringExtra(String)
7283 */
7284 public Intent putExtra(String name, String value) {
7285 if (mExtras == null) {
7286 mExtras = new Bundle();
7287 }
7288 mExtras.putString(name, value);
7289 return this;
7290 }
7291
7292 /**
7293 * Add extended data to the intent. The name must include a package
7294 * prefix, for example the app com.android.contacts would use names
7295 * like "com.android.contacts.ShowAll".
7296 *
7297 * @param name The name of the extra data, with package prefix.
7298 * @param value The CharSequence data value.
7299 *
7300 * @return Returns the same Intent object, for chaining multiple calls
7301 * into a single statement.
7302 *
7303 * @see #putExtras
7304 * @see #removeExtra
7305 * @see #getCharSequenceExtra(String)
7306 */
7307 public Intent putExtra(String name, CharSequence value) {
7308 if (mExtras == null) {
7309 mExtras = new Bundle();
7310 }
7311 mExtras.putCharSequence(name, value);
7312 return this;
7313 }
7314
7315 /**
7316 * Add extended data to the intent. The name must include a package
7317 * prefix, for example the app com.android.contacts would use names
7318 * like "com.android.contacts.ShowAll".
7319 *
7320 * @param name The name of the extra data, with package prefix.
7321 * @param value The Parcelable data value.
7322 *
7323 * @return Returns the same Intent object, for chaining multiple calls
7324 * into a single statement.
7325 *
7326 * @see #putExtras
7327 * @see #removeExtra
7328 * @see #getParcelableExtra(String)
7329 */
7330 public Intent putExtra(String name, Parcelable value) {
7331 if (mExtras == null) {
7332 mExtras = new Bundle();
7333 }
7334 mExtras.putParcelable(name, value);
7335 return this;
7336 }
7337
7338 /**
7339 * Add extended data to the intent. The name must include a package
7340 * prefix, for example the app com.android.contacts would use names
7341 * like "com.android.contacts.ShowAll".
7342 *
7343 * @param name The name of the extra data, with package prefix.
7344 * @param value The Parcelable[] data value.
7345 *
7346 * @return Returns the same Intent object, for chaining multiple calls
7347 * into a single statement.
7348 *
7349 * @see #putExtras
7350 * @see #removeExtra
7351 * @see #getParcelableArrayExtra(String)
7352 */
7353 public Intent putExtra(String name, Parcelable[] value) {
7354 if (mExtras == null) {
7355 mExtras = new Bundle();
7356 }
7357 mExtras.putParcelableArray(name, value);
7358 return this;
7359 }
7360
7361 /**
7362 * Add extended data to the intent. The name must include a package
7363 * prefix, for example the app com.android.contacts would use names
7364 * like "com.android.contacts.ShowAll".
7365 *
7366 * @param name The name of the extra data, with package prefix.
7367 * @param value The ArrayList<Parcelable> data value.
7368 *
7369 * @return Returns the same Intent object, for chaining multiple calls
7370 * into a single statement.
7371 *
7372 * @see #putExtras
7373 * @see #removeExtra
7374 * @see #getParcelableArrayListExtra(String)
7375 */
7376 public Intent putParcelableArrayListExtra(String name, ArrayList<? extends Parcelable> value) {
7377 if (mExtras == null) {
7378 mExtras = new Bundle();
7379 }
7380 mExtras.putParcelableArrayList(name, value);
7381 return this;
7382 }
7383
7384 /**
7385 * Add extended data to the intent. The name must include a package
7386 * prefix, for example the app com.android.contacts would use names
7387 * like "com.android.contacts.ShowAll".
7388 *
7389 * @param name The name of the extra data, with package prefix.
7390 * @param value The ArrayList<Integer> data value.
7391 *
7392 * @return Returns the same Intent object, for chaining multiple calls
7393 * into a single statement.
7394 *
7395 * @see #putExtras
7396 * @see #removeExtra
7397 * @see #getIntegerArrayListExtra(String)
7398 */
7399 public Intent putIntegerArrayListExtra(String name, ArrayList<Integer> value) {
7400 if (mExtras == null) {
7401 mExtras = new Bundle();
7402 }
7403 mExtras.putIntegerArrayList(name, value);
7404 return this;
7405 }
7406
7407 /**
7408 * Add extended data to the intent. The name must include a package
7409 * prefix, for example the app com.android.contacts would use names
7410 * like "com.android.contacts.ShowAll".
7411 *
7412 * @param name The name of the extra data, with package prefix.
7413 * @param value The ArrayList<String> data value.
7414 *
7415 * @return Returns the same Intent object, for chaining multiple calls
7416 * into a single statement.
7417 *
7418 * @see #putExtras
7419 * @see #removeExtra
7420 * @see #getStringArrayListExtra(String)
7421 */
7422 public Intent putStringArrayListExtra(String name, ArrayList<String> value) {
7423 if (mExtras == null) {
7424 mExtras = new Bundle();
7425 }
7426 mExtras.putStringArrayList(name, value);
7427 return this;
7428 }
7429
7430 /**
7431 * Add extended data to the intent. The name must include a package
7432 * prefix, for example the app com.android.contacts would use names
7433 * like "com.android.contacts.ShowAll".
7434 *
7435 * @param name The name of the extra data, with package prefix.
7436 * @param value The ArrayList<CharSequence> data value.
7437 *
7438 * @return Returns the same Intent object, for chaining multiple calls
7439 * into a single statement.
7440 *
7441 * @see #putExtras
7442 * @see #removeExtra
7443 * @see #getCharSequenceArrayListExtra(String)
7444 */
7445 public Intent putCharSequenceArrayListExtra(String name, ArrayList<CharSequence> value) {
7446 if (mExtras == null) {
7447 mExtras = new Bundle();
7448 }
7449 mExtras.putCharSequenceArrayList(name, value);
7450 return this;
7451 }
7452
7453 /**
7454 * Add extended data to the intent. The name must include a package
7455 * prefix, for example the app com.android.contacts would use names
7456 * like "com.android.contacts.ShowAll".
7457 *
7458 * @param name The name of the extra data, with package prefix.
7459 * @param value The Serializable data value.
7460 *
7461 * @return Returns the same Intent object, for chaining multiple calls
7462 * into a single statement.
7463 *
7464 * @see #putExtras
7465 * @see #removeExtra
7466 * @see #getSerializableExtra(String)
7467 */
7468 public Intent putExtra(String name, Serializable value) {
7469 if (mExtras == null) {
7470 mExtras = new Bundle();
7471 }
7472 mExtras.putSerializable(name, value);
7473 return this;
7474 }
7475
7476 /**
7477 * Add extended data to the intent. The name must include a package
7478 * prefix, for example the app com.android.contacts would use names
7479 * like "com.android.contacts.ShowAll".
7480 *
7481 * @param name The name of the extra data, with package prefix.
7482 * @param value The boolean array data value.
7483 *
7484 * @return Returns the same Intent object, for chaining multiple calls
7485 * into a single statement.
7486 *
7487 * @see #putExtras
7488 * @see #removeExtra
7489 * @see #getBooleanArrayExtra(String)
7490 */
7491 public Intent putExtra(String name, boolean[] value) {
7492 if (mExtras == null) {
7493 mExtras = new Bundle();
7494 }
7495 mExtras.putBooleanArray(name, value);
7496 return this;
7497 }
7498
7499 /**
7500 * Add extended data to the intent. The name must include a package
7501 * prefix, for example the app com.android.contacts would use names
7502 * like "com.android.contacts.ShowAll".
7503 *
7504 * @param name The name of the extra data, with package prefix.
7505 * @param value The byte array data value.
7506 *
7507 * @return Returns the same Intent object, for chaining multiple calls
7508 * into a single statement.
7509 *
7510 * @see #putExtras
7511 * @see #removeExtra
7512 * @see #getByteArrayExtra(String)
7513 */
7514 public Intent putExtra(String name, byte[] value) {
7515 if (mExtras == null) {
7516 mExtras = new Bundle();
7517 }
7518 mExtras.putByteArray(name, value);
7519 return this;
7520 }
7521
7522 /**
7523 * Add extended data to the intent. The name must include a package
7524 * prefix, for example the app com.android.contacts would use names
7525 * like "com.android.contacts.ShowAll".
7526 *
7527 * @param name The name of the extra data, with package prefix.
7528 * @param value The short array data value.
7529 *
7530 * @return Returns the same Intent object, for chaining multiple calls
7531 * into a single statement.
7532 *
7533 * @see #putExtras
7534 * @see #removeExtra
7535 * @see #getShortArrayExtra(String)
7536 */
7537 public Intent putExtra(String name, short[] value) {
7538 if (mExtras == null) {
7539 mExtras = new Bundle();
7540 }
7541 mExtras.putShortArray(name, value);
7542 return this;
7543 }
7544
7545 /**
7546 * Add extended data to the intent. The name must include a package
7547 * prefix, for example the app com.android.contacts would use names
7548 * like "com.android.contacts.ShowAll".
7549 *
7550 * @param name The name of the extra data, with package prefix.
7551 * @param value The char array data value.
7552 *
7553 * @return Returns the same Intent object, for chaining multiple calls
7554 * into a single statement.
7555 *
7556 * @see #putExtras
7557 * @see #removeExtra
7558 * @see #getCharArrayExtra(String)
7559 */
7560 public Intent putExtra(String name, char[] value) {
7561 if (mExtras == null) {
7562 mExtras = new Bundle();
7563 }
7564 mExtras.putCharArray(name, value);
7565 return this;
7566 }
7567
7568 /**
7569 * Add extended data to the intent. The name must include a package
7570 * prefix, for example the app com.android.contacts would use names
7571 * like "com.android.contacts.ShowAll".
7572 *
7573 * @param name The name of the extra data, with package prefix.
7574 * @param value The int array data value.
7575 *
7576 * @return Returns the same Intent object, for chaining multiple calls
7577 * into a single statement.
7578 *
7579 * @see #putExtras
7580 * @see #removeExtra
7581 * @see #getIntArrayExtra(String)
7582 */
7583 public Intent putExtra(String name, int[] value) {
7584 if (mExtras == null) {
7585 mExtras = new Bundle();
7586 }
7587 mExtras.putIntArray(name, value);
7588 return this;
7589 }
7590
7591 /**
7592 * Add extended data to the intent. The name must include a package
7593 * prefix, for example the app com.android.contacts would use names
7594 * like "com.android.contacts.ShowAll".
7595 *
7596 * @param name The name of the extra data, with package prefix.
7597 * @param value The byte array data value.
7598 *
7599 * @return Returns the same Intent object, for chaining multiple calls
7600 * into a single statement.
7601 *
7602 * @see #putExtras
7603 * @see #removeExtra
7604 * @see #getLongArrayExtra(String)
7605 */
7606 public Intent putExtra(String name, long[] value) {
7607 if (mExtras == null) {
7608 mExtras = new Bundle();
7609 }
7610 mExtras.putLongArray(name, value);
7611 return this;
7612 }
7613
7614 /**
7615 * Add extended data to the intent. The name must include a package
7616 * prefix, for example the app com.android.contacts would use names
7617 * like "com.android.contacts.ShowAll".
7618 *
7619 * @param name The name of the extra data, with package prefix.
7620 * @param value The float array data value.
7621 *
7622 * @return Returns the same Intent object, for chaining multiple calls
7623 * into a single statement.
7624 *
7625 * @see #putExtras
7626 * @see #removeExtra
7627 * @see #getFloatArrayExtra(String)
7628 */
7629 public Intent putExtra(String name, float[] value) {
7630 if (mExtras == null) {
7631 mExtras = new Bundle();
7632 }
7633 mExtras.putFloatArray(name, value);
7634 return this;
7635 }
7636
7637 /**
7638 * Add extended data to the intent. The name must include a package
7639 * prefix, for example the app com.android.contacts would use names
7640 * like "com.android.contacts.ShowAll".
7641 *
7642 * @param name The name of the extra data, with package prefix.
7643 * @param value The double array data value.
7644 *
7645 * @return Returns the same Intent object, for chaining multiple calls
7646 * into a single statement.
7647 *
7648 * @see #putExtras
7649 * @see #removeExtra
7650 * @see #getDoubleArrayExtra(String)
7651 */
7652 public Intent putExtra(String name, double[] value) {
7653 if (mExtras == null) {
7654 mExtras = new Bundle();
7655 }
7656 mExtras.putDoubleArray(name, value);
7657 return this;
7658 }
7659
7660 /**
7661 * Add extended data to the intent. The name must include a package
7662 * prefix, for example the app com.android.contacts would use names
7663 * like "com.android.contacts.ShowAll".
7664 *
7665 * @param name The name of the extra data, with package prefix.
7666 * @param value The String array data value.
7667 *
7668 * @return Returns the same Intent object, for chaining multiple calls
7669 * into a single statement.
7670 *
7671 * @see #putExtras
7672 * @see #removeExtra
7673 * @see #getStringArrayExtra(String)
7674 */
7675 public Intent putExtra(String name, String[] value) {
7676 if (mExtras == null) {
7677 mExtras = new Bundle();
7678 }
7679 mExtras.putStringArray(name, value);
7680 return this;
7681 }
7682
7683 /**
7684 * Add extended data to the intent. The name must include a package
7685 * prefix, for example the app com.android.contacts would use names
7686 * like "com.android.contacts.ShowAll".
7687 *
7688 * @param name The name of the extra data, with package prefix.
7689 * @param value The CharSequence array data value.
7690 *
7691 * @return Returns the same Intent object, for chaining multiple calls
7692 * into a single statement.
7693 *
7694 * @see #putExtras
7695 * @see #removeExtra
7696 * @see #getCharSequenceArrayExtra(String)
7697 */
7698 public Intent putExtra(String name, CharSequence[] value) {
7699 if (mExtras == null) {
7700 mExtras = new Bundle();
7701 }
7702 mExtras.putCharSequenceArray(name, value);
7703 return this;
7704 }
7705
7706 /**
7707 * Add extended data to the intent. The name must include a package
7708 * prefix, for example the app com.android.contacts would use names
7709 * like "com.android.contacts.ShowAll".
7710 *
7711 * @param name The name of the extra data, with package prefix.
7712 * @param value The Bundle data value.
7713 *
7714 * @return Returns the same Intent object, for chaining multiple calls
7715 * into a single statement.
7716 *
7717 * @see #putExtras
7718 * @see #removeExtra
7719 * @see #getBundleExtra(String)
7720 */
7721 public Intent putExtra(String name, Bundle value) {
7722 if (mExtras == null) {
7723 mExtras = new Bundle();
7724 }
7725 mExtras.putBundle(name, value);
7726 return this;
7727 }
7728
7729 /**
7730 * Add extended data to the intent. The name must include a package
7731 * prefix, for example the app com.android.contacts would use names
7732 * like "com.android.contacts.ShowAll".
7733 *
7734 * @param name The name of the extra data, with package prefix.
7735 * @param value The IBinder data value.
7736 *
7737 * @return Returns the same Intent object, for chaining multiple calls
7738 * into a single statement.
7739 *
7740 * @see #putExtras
7741 * @see #removeExtra
7742 * @see #getIBinderExtra(String)
7743 *
7744 * @deprecated
7745 * @hide
7746 */
7747 @Deprecated
7748 public Intent putExtra(String name, IBinder value) {
7749 if (mExtras == null) {
7750 mExtras = new Bundle();
7751 }
7752 mExtras.putIBinder(name, value);
7753 return this;
7754 }
putExtras拷贝所有外部的Intent的东西到当前mExtras
7756 /**
7757 * Copy all extras in 'src' in to this intent.
7758 *
7759 * @param src Contains the extras to copy.
7760 *
7761 * @see #putExtra
7762 */
7763 public Intent putExtras(Intent src) {
7764 if (src.mExtras != null) {
7765 if (mExtras == null) {
7766 mExtras = new Bundle(src.mExtras);
7767 } else {
7768 mExtras.putAll(src.mExtras);
7769 }
7770 }
7771 return this;
7772 }
7773
7774 /**
7775 * Add a set of extended data to the intent. The keys must include a package
7776 * prefix, for example the app com.android.contacts would use names
7777 * like "com.android.contacts.ShowAll".
7778 *
7779 * @param extras The Bundle of extras to add to this intent.
7780 *
7781 * @see #putExtra
7782 * @see #removeExtra
7783 */
7784 public Intent putExtras(Bundle extras) {
7785 if (mExtras == null) {
7786 mExtras = new Bundle();
7787 }
7788 mExtras.putAll(extras);
7789 return this;
7790 }
replaceExtras完全替换当前的mExtras
7792 /**
7793 * Completely replace the extras in the Intent with the extras in the
7794 * given Intent.
7795 *
7796 * @param src The exact extras contained in this Intent are copied
7797 * into the target intent, replacing any that were previously there.
7798 */
7799 public Intent replaceExtras(Intent src) {
7800 mExtras = src.mExtras != null ? new Bundle(src.mExtras) : null;
7801 return this;
7802 }
7803
7804 /**
7805 * Completely replace the extras in the Intent with the given Bundle of
7806 * extras.
7807 *
7808 * @param extras The new set of extras in the Intent, or null to erase
7809 * all extras.
7810 */
7811 public Intent replaceExtras(Bundle extras) {
7812 mExtras = extras != null ? new Bundle(extras) : null;
7813 return this;
7814 }
removeExtra调用Bundle的remove方法清空内容，并将其设为NULL
7816 /**
7817 * Remove extended data from the intent.
7818 *
7819 * @see #putExtra
7820 */
7821 public void removeExtra(String name) {
7822 if (mExtras != null) {
7823 mExtras.remove(name);
7824 if (mExtras.size() == 0) {
7825 mExtras = null;
7826 }
7827 }
7828 }
setFlags和addFlags设置和附加flag
7830 /**
7831 * Set special flags controlling how this intent is handled. Most values
7832 * here depend on the type of component being executed by the Intent,
7833 * specifically the FLAG_ACTIVITY_* flags are all for use with
7834 * {@link Context#startActivity Context.startActivity()} and the
7835 * FLAG_RECEIVER_* flags are all for use with
7836 * {@link Context#sendBroadcast(Intent) Context.sendBroadcast()}.
7837 *
7838 * <p>See the
7839 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
7840 * Stack</a> documentation for important information on how some of these options impact
7841 * the behavior of your application.
7842 *
7843 * @param flags The desired flags.
7844 *
7845 * @return Returns the same Intent object, for chaining multiple calls
7846 * into a single statement.
7847 *
7848 * @see #getFlags
7849 * @see #addFlags
7850 *
7851 * @see #FLAG_GRANT_READ_URI_PERMISSION
7852 * @see #FLAG_GRANT_WRITE_URI_PERMISSION
7853 * @see #FLAG_GRANT_PERSISTABLE_URI_PERMISSION
7854 * @see #FLAG_GRANT_PREFIX_URI_PERMISSION
7855 * @see #FLAG_DEBUG_LOG_RESOLUTION
7856 * @see #FLAG_FROM_BACKGROUND
7857 * @see #FLAG_ACTIVITY_BROUGHT_TO_FRONT
7858 * @see #FLAG_ACTIVITY_CLEAR_TASK
7859 * @see #FLAG_ACTIVITY_CLEAR_TOP
7860 * @see #FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET
7861 * @see #FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
7862 * @see #FLAG_ACTIVITY_FORWARD_RESULT
7863 * @see #FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY
7864 * @see #FLAG_ACTIVITY_MULTIPLE_TASK
7865 * @see #FLAG_ACTIVITY_NEW_DOCUMENT
7866 * @see #FLAG_ACTIVITY_NEW_TASK
7867 * @see #FLAG_ACTIVITY_NO_ANIMATION
7868 * @see #FLAG_ACTIVITY_NO_HISTORY
7869 * @see #FLAG_ACTIVITY_NO_USER_ACTION
7870 * @see #FLAG_ACTIVITY_PREVIOUS_IS_TOP
7871 * @see #FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
7872 * @see #FLAG_ACTIVITY_REORDER_TO_FRONT
7873 * @see #FLAG_ACTIVITY_SINGLE_TOP
7874 * @see #FLAG_ACTIVITY_TASK_ON_HOME
7875 * @see #FLAG_RECEIVER_REGISTERED_ONLY
7876 */
7877 public Intent setFlags(int flags) {
7878 mFlags = flags;
7879 return this;
7880 }
7881
7882 /**
7883 * Add additional flags to the intent (or with existing flags
7884 * value).
7885 *
7886 * @param flags The new flags to set.
7887 *
7888 * @return Returns the same Intent object, for chaining multiple calls
7889 * into a single statement.
7890 *
7891 * @see #setFlags
7892 */
7893 public Intent addFlags(int flags) {
7894 mFlags |= flags;
7895 return this;
7896 }
7897
setPackage设packageName,mSelector一定要为空
7898 /**
7899 * (Usually optional) Set an explicit application package name that limits
7900 * the components this Intent will resolve to. If left to the default
7901 * value of null, all components in all applications will considered.
7902 * If non-null, the Intent can only match the components in the given
7903 * application package.
7904 *
7905 * @param packageName The name of the application package to handle the
7906 * intent, or null to allow any application package.
7907 *
7908 * @return Returns the same Intent object, for chaining multiple calls
7909 * into a single statement.
7910 *
7911 * @see #getPackage
7912 * @see #resolveActivity
7913 */
7914 public Intent setPackage(String packageName) {
7915 if (packageName != null && mSelector != null) {
7916 throw new IllegalArgumentException(
7917 "Can't set package name when selector is already set");
7918 }
7919 mPackage = packageName;
7920 return this;
7921 }
7922
setComponent设置component
7923 /**
7924 * (Usually optional) Explicitly set the component to handle the intent.
7925 * If left with the default value of null, the system will determine the
7926 * appropriate class to use based on the other fields (action, data,
7927 * type, categories) in the Intent. If this class is defined, the
7928 * specified class will always be used regardless of the other fields. You
7929 * should only set this value when you know you absolutely want a specific
7930 * class to be used; otherwise it is better to let the system find the
7931 * appropriate class so that you will respect the installed applications
7932 * and user preferences.
7933 *
7934 * @param component The name of the application component to handle the
7935 * intent, or null to let the system find one for you.
7936 *
7937 * @return Returns the same Intent object, for chaining multiple calls
7938 * into a single statement.
7939 *
7940 * @see #setClass
7941 * @see #setClassName(Context, String)
7942 * @see #setClassName(String, String)
7943 * @see #getComponent
7944 * @see #resolveActivity
7945 */
7946 public Intent setComponent(ComponentName component) {
7947 mComponent = component;
7948 return this;
7949 }
setClassName,setClass用ComponentName来通过类或者类名设置mComponent
7951 /**
7952 * Convenience for calling {@link #setComponent} with an
7953 * explicit class name.
7954 *
7955 * @param packageContext A Context of the application package implementing
7956 * this class.
7957 * @param className The name of a class inside of the application package
7958 * that will be used as the component for this Intent.
7959 *
7960 * @return Returns the same Intent object, for chaining multiple calls
7961 * into a single statement.
7962 *
7963 * @see #setComponent
7964 * @see #setClass
7965 */
7966 public Intent setClassName(Context packageContext, String className) {
7967 mComponent = new ComponentName(packageContext, className);
7968 return this;
7969 }
7970
7971 /**
7972 * Convenience for calling {@link #setComponent} with an
7973 * explicit application package name and class name.
7974 *
7975 * @param packageName The name of the package implementing the desired
7976 * component.
7977 * @param className The name of a class inside of the application package
7978 * that will be used as the component for this Intent.
7979 *
7980 * @return Returns the same Intent object, for chaining multiple calls
7981 * into a single statement.
7982 *
7983 * @see #setComponent
7984 * @see #setClass
7985 */
7986 public Intent setClassName(String packageName, String className) {
7987 mComponent = new ComponentName(packageName, className);
7988 return this;
7989 }
7990
7991 /**
7992 * Convenience for calling {@link #setComponent(ComponentName)} with the
7993 * name returned by a {@link Class} object.
7994 *
7995 * @param packageContext A Context of the application package implementing
7996 * this class.
7997 * @param cls The class name to set, equivalent to
7998 * <code>setClassName(context, cls.getName())</code>.
7999 *
8000 * @return Returns the same Intent object, for chaining multiple calls
8001 * into a single statement.
8002 *
8003 * @see #setComponent
8004 */
8005 public Intent setClass(Context packageContext, Class<?> cls) {
8006 mComponent = new ComponentName(packageContext, cls);
8007 return this;
8008 }
setSourceBounds这只mSourceBounds，原始发送者的屏幕坐标范围
8010 /**
8011 * Set the bounds of the sender of this intent, in screen coordinates. This can be
8012 * used as a hint to the receiver for animations and the like. Null means that there
8013 * is no source bounds.
8014 */
8015 public void setSourceBounds(Rect r) {
8016 if (r != null) {
8017 mSourceBounds = new Rect(r);
8018 } else {
8019 mSourceBounds = null;
8020 }
8021 }
定义interface注释FillInFlags
8023 /** @hide */
8024 @IntDef(flag = true,
8025 value = {
8026 FILL_IN_ACTION,
8027 FILL_IN_DATA,
8028 FILL_IN_CATEGORIES,
8029 FILL_IN_COMPONENT,
8030 FILL_IN_PACKAGE,
8031 FILL_IN_SOURCE_BOUNDS,
8032 FILL_IN_SELECTOR,
8033 FILL_IN_CLIP_DATA
8034 })
8035 @Retention(RetentionPolicy.SOURCE)
8036 public @interface FillInFlags {}
下面八个是可以被FillIn的私有变量
8038 /**
8039 * Use with {@link #fillIn} to allow the current action value to be
8040 * overwritten, even if it is already set.
8041 */
8042 public static final int FILL_IN_ACTION = 1<<0;
8043
8044 /**
8045 * Use with {@link #fillIn} to allow the current data or type value
8046 * overwritten, even if it is already set.
8047 */
8048 public static final int FILL_IN_DATA = 1<<1;
8049
8050 /**
8051 * Use with {@link #fillIn} to allow the current categories to be
8052 * overwritten, even if they are already set.
8053 */
8054 public static final int FILL_IN_CATEGORIES = 1<<2;
8055
8056 /**
8057 * Use with {@link #fillIn} to allow the current component value to be
8058 * overwritten, even if it is already set.
8059 */
8060 public static final int FILL_IN_COMPONENT = 1<<3;
8061
8062 /**
8063 * Use with {@link #fillIn} to allow the current package value to be
8064 * overwritten, even if it is already set.
8065 */
8066 public static final int FILL_IN_PACKAGE = 1<<4;
8067
8068 /**
8069 * Use with {@link #fillIn} to allow the current bounds rectangle to be
8070 * overwritten, even if it is already set.
8071 */
8072 public static final int FILL_IN_SOURCE_BOUNDS = 1<<5;
8073
8074 /**
8075 * Use with {@link #fillIn} to allow the current selector to be
8076 * overwritten, even if it is already set.
8077 */
8078 public static final int FILL_IN_SELECTOR = 1<<6;
8079
8080 /**
8081 * Use with {@link #fillIn} to allow the current ClipData to be
8082 * overwritten, even if it is already set.
8083 */
8084 public static final int FILL_IN_CLIP_DATA = 1<<7;
8085
FillIn函数从另外一个Intent里拷贝需要的数据，flag指定哪些数据要被拷贝
8086 /**
8087 * Copy the contents of <var>other</var> in to this object, but only
8088 * where fields are not defined by this object. For purposes of a field
8089 * being defined, the following pieces of data in the Intent are
8090 * considered to be separate fields:
8091 *
8092 * <ul>
8093 * <li> action, as set by {@link #setAction}.
8094 * <li> data Uri and MIME type, as set by {@link #setData(Uri)},
8095 * {@link #setType(String)}, or {@link #setDataAndType(Uri, String)}.
8096 * <li> categories, as set by {@link #addCategory}.
8097 * <li> package, as set by {@link #setPackage}.
8098 * <li> component, as set by {@link #setComponent(ComponentName)} or
8099 * related methods.
8100 * <li> source bounds, as set by {@link #setSourceBounds}.
8101 * <li> selector, as set by {@link #setSelector(Intent)}.
8102 * <li> clip data, as set by {@link #setClipData(ClipData)}.
8103 * <li> each top-level name in the associated extras.
8104 * </ul>
8105 *
8106 * <p>In addition, you can use the {@link #FILL_IN_ACTION},
8107 * {@link #FILL_IN_DATA}, {@link #FILL_IN_CATEGORIES}, {@link #FILL_IN_PACKAGE},
8108 * {@link #FILL_IN_COMPONENT}, {@link #FILL_IN_SOURCE_BOUNDS},
8109 * {@link #FILL_IN_SELECTOR}, and {@link #FILL_IN_CLIP_DATA} to override
8110 * the restriction where the corresponding field will not be replaced if
8111 * it is already set.
8112 *
8113 * <p>Note: The component field will only be copied if {@link #FILL_IN_COMPONENT}
8114 * is explicitly specified. The selector will only be copied if
8115 * {@link #FILL_IN_SELECTOR} is explicitly specified.
8116 *
8117 * <p>For example, consider Intent A with {data="foo", categories="bar"}
8118 * and Intent B with {action="gotit", data-type="some/thing",
8119 * categories="one","two"}.
8120 *
8121 * <p>Calling A.fillIn(B, Intent.FILL_IN_DATA) will result in A now
8122 * containing: {action="gotit", data-type="some/thing",
8123 * categories="bar"}.
8124 *
8125 * @param other Another Intent whose values are to be used to fill in
8126 * the current one.
8127 * @param flags Options to control which fields can be filled in.
8128 *
8129 * @return Returns a bit mask of {@link #FILL_IN_ACTION},
8130 * {@link #FILL_IN_DATA}, {@link #FILL_IN_CATEGORIES}, {@link #FILL_IN_PACKAGE},
8131 * {@link #FILL_IN_COMPONENT}, {@link #FILL_IN_SOURCE_BOUNDS},
8132 * {@link #FILL_IN_SELECTOR} and {@link #FILL_IN_CLIP_DATA indicating which fields were
8133 * changed.
8134 */
8135 @FillInFlags
8136 public int fillIn(Intent other, @FillInFlags int flags) {
8137 int changes = 0;
8138 boolean mayHaveCopiedUris = false;
8139 if (other.mAction != null
8140 && (mAction == null || (flags&FILL_IN_ACTION) != 0)) {
8141 mAction = other.mAction;
8142 changes |= FILL_IN_ACTION;
8143 }
8144 if ((other.mData != null || other.mType != null)
8145 && ((mData == null && mType == null)
8146 || (flags&FILL_IN_DATA) != 0)) {
8147 mData = other.mData;
8148 mType = other.mType;
8149 changes |= FILL_IN_DATA;
8150 mayHaveCopiedUris = true;
8151 }
8152 if (other.mCategories != null
8153 && (mCategories == null || (flags&FILL_IN_CATEGORIES) != 0)) {
8154 if (other.mCategories != null) {
8155 mCategories = new ArraySet<String>(other.mCategories);
8156 }
8157 changes |= FILL_IN_CATEGORIES;
8158 }
8159 if (other.mPackage != null
8160 && (mPackage == null || (flags&FILL_IN_PACKAGE) != 0)) {
8161 // Only do this if mSelector is not set.
8162 if (mSelector == null) {
8163 mPackage = other.mPackage;
8164 changes |= FILL_IN_PACKAGE;
8165 }
8166 }
8167 // Selector is special: it can only be set if explicitly allowed,
8168 // for the same reason as the component name.
8169 if (other.mSelector != null && (flags&FILL_IN_SELECTOR) != 0) {
8170 if (mPackage == null) {
8171 mSelector = new Intent(other.mSelector);
8172 mPackage = null;
8173 changes |= FILL_IN_SELECTOR;
8174 }
8175 }
8176 if (other.mClipData != null
8177 && (mClipData == null || (flags&FILL_IN_CLIP_DATA) != 0)) {
8178 mClipData = other.mClipData;
8179 changes |= FILL_IN_CLIP_DATA;
8180 mayHaveCopiedUris = true;
8181 }
8182 // Component is special: it can -only- be set if explicitly allowed,
8183 // since otherwise the sender could force the intent somewhere the
8184 // originator didn't intend.
8185 if (other.mComponent != null && (flags&FILL_IN_COMPONENT) != 0) {
8186 mComponent = other.mComponent;
8187 changes |= FILL_IN_COMPONENT;
8188 }
8189 mFlags |= other.mFlags;
8190 if (other.mSourceBounds != null
8191 && (mSourceBounds == null || (flags&FILL_IN_SOURCE_BOUNDS) != 0)) {
8192 mSourceBounds = new Rect(other.mSourceBounds);
8193 changes |= FILL_IN_SOURCE_BOUNDS;
8194 }
8195 if (mExtras == null) {
8196 if (other.mExtras != null) {
8197 mExtras = new Bundle(other.mExtras);
8198 mayHaveCopiedUris = true;
8199 }
8200 } else if (other.mExtras != null) {
8201 try {
8202 Bundle newb = new Bundle(other.mExtras);
8203 newb.putAll(mExtras);
8204 mExtras = newb;
8205 mayHaveCopiedUris = true;
8206 } catch (RuntimeException e) {
8207 // Modifying the extras can cause us to unparcel the contents
8208 // of the bundle, and if we do this in the system process that
8209 // may fail. We really should handle this (i.e., the Bundle
8210 // impl shouldn't be on top of a plain map), but for now just
8211 // ignore it and keep the original contents. :(
8212 Log.w("Intent", "Failure filling in extras", e);
8213 }
8214 }
8215 if (mayHaveCopiedUris && mContentUserHint == UserHandle.USER_CURRENT
8216 && other.mContentUserHint != UserHandle.USER_CURRENT) {
8217 mContentUserHint = other.mContentUserHint;
8218 }
8219 return changes;
8220 }
filterEquals判断两个Intent是否相同
8263 /**
8264 * Determine if two intents are the same for the purposes of intent
8265 * resolution (filtering). That is, if their action, data, type,
8266 * class, and categories are the same. This does <em>not</em> compare
8267 * any extra data included in the intents.
8268 *
8269 * @param other The other Intent to compare against.
8270 *
8271 * @return Returns true if action, data, type, class, and categories
8272 * are the same.
8273 */
8274 public boolean filterEquals(Intent other) {
8275 if (other == null) {
8276 return false;
8277 }
8278 if (!Objects.equals(this.mAction, other.mAction)) return false;
8279 if (!Objects.equals(this.mData, other.mData)) return false;
8280 if (!Objects.equals(this.mType, other.mType)) return false;
8281 if (!Objects.equals(this.mPackage, other.mPackage)) return false;
8282 if (!Objects.equals(this.mComponent, other.mComponent)) return false;
8283 if (!Objects.equals(this.mCategories, other.mCategories)) return false;
8284
8285 return true;
8286 }
filterHashCode返回几个核心私有变量的hashcode之和
8288 /**
8289 * Generate hash code that matches semantics of filterEquals().
8290 *
8291 * @return Returns the hash value of the action, data, type, class, and
8292 * categories.
8293 *
8294 * @see #filterEquals
8295 */
8296 public int filterHashCode() {
8297 int code = 0;
8298 if (mAction != null) {
8299 code += mAction.hashCode();
8300 }
8301 if (mData != null) {
8302 code += mData.hashCode();
8303 }
8304 if (mType != null) {
8305 code += mType.hashCode();
8306 }
8307 if (mPackage != null) {
8308 code += mPackage.hashCode();
8309 }
8310 if (mComponent != null) {
8311 code += mComponent.hashCode();
8312 }
8313 if (mCategories != null) {
8314 code += mCategories.hashCode();
8315 }
8316 return code;
8317 }
静态内部类FilterComparison抽象了比较两个Intent的流程
8222 /**
8223 * Wrapper class holding an Intent and implementing comparisons on it for
8224 * the purpose of filtering. The class implements its
8225 * {@link #equals equals()} and {@link #hashCode hashCode()} methods as
8226 * simple calls to {@link Intent#filterEquals(Intent)} filterEquals()} and
8227 * {@link android.content.Intent#filterHashCode()} filterHashCode()}
8228 * on the wrapped Intent.
8229 */
8230 public static final class FilterComparison {
8231 private final Intent mIntent;
8232 private final int mHashCode;
8233
8234 public FilterComparison(Intent intent) {
8235 mIntent = intent;
8236 mHashCode = intent.filterHashCode();
8237 }
8238
8239 /**
8240 * Return the Intent that this FilterComparison represents.
8241 * @return Returns the Intent held by the FilterComparison. Do
8242 * not modify!
8243 */
8244 public Intent getIntent() {
8245 return mIntent;
8246 }
8247
8248 @Override
8249 public boolean equals(Object obj) {
8250 if (obj instanceof FilterComparison) {
8251 Intent other = ((FilterComparison)obj).mIntent;
8252 return mIntent.filterEquals(other);
8253 }
8254 return false;
8255 }
8256
8257 @Override
8258 public int hashCode() {
8259 return mHashCode;
8260 }
8261 }
一系列的toString函数返回Intetn内部的关键变量字符串
8319 @Override
8320 public String toString() {
8321 StringBuilder b = new StringBuilder(128);
8322
8323 b.append("Intent { ");
8324 toShortString(b, true, true, true, false);
8325 b.append(" }");
8326
8327 return b.toString();
8328 }
8329
8330 /** @hide */
8331 public String toInsecureString() {
8332 StringBuilder b = new StringBuilder(128);
8333
8334 b.append("Intent { ");
8335 toShortString(b, false, true, true, false);
8336 b.append(" }");
8337
8338 return b.toString();
8339 }
8340
8341 /** @hide */
8342 public String toInsecureStringWithClip() {
8343 StringBuilder b = new StringBuilder(128);
8344
8345 b.append("Intent { ");
8346 toShortString(b, false, true, true, true);
8347 b.append(" }");
8348
8349 return b.toString();
8350 }
8351
8352 /** @hide */
8353 public String toShortString(boolean secure, boolean comp, boolean extras, boolean clip) {
8354 StringBuilder b = new StringBuilder(128);
8355 toShortString(b, secure, comp, extras, clip);
8356 return b.toString();
8357 }
8358
8359 /** @hide */
8360 public void toShortString(StringBuilder b, boolean secure, boolean comp, boolean extras,
8361 boolean clip) {
8362 boolean first = true;
8363 if (mAction != null) {
8364 b.append("act=").append(mAction);
8365 first = false;
8366 }
8367 if (mCategories != null) {
8368 if (!first) {
8369 b.append(' ');
8370 }
8371 first = false;
8372 b.append("cat=[");
8373 for (int i=0; i<mCategories.size(); i++) {
8374 if (i > 0) b.append(',');
8375 b.append(mCategories.valueAt(i));
8376 }
8377 b.append("]");
8378 }
8379 if (mData != null) {
8380 if (!first) {
8381 b.append(' ');
8382 }
8383 first = false;
8384 b.append("dat=");
8385 if (secure) {
8386 b.append(mData.toSafeString());
8387 } else {
8388 b.append(mData);
8389 }
8390 }
8391 if (mType != null) {
8392 if (!first) {
8393 b.append(' ');
8394 }
8395 first = false;
8396 b.append("typ=").append(mType);
8397 }
8398 if (mFlags != 0) {
8399 if (!first) {
8400 b.append(' ');
8401 }
8402 first = false;
8403 b.append("flg=0x").append(Integer.toHexString(mFlags));
8404 }
8405 if (mPackage != null) {
8406 if (!first) {
8407 b.append(' ');
8408 }
8409 first = false;
8410 b.append("pkg=").append(mPackage);
8411 }
8412 if (comp && mComponent != null) {
8413 if (!first) {
8414 b.append(' ');
8415 }
8416 first = false;
8417 b.append("cmp=").append(mComponent.flattenToShortString());
8418 }
8419 if (mSourceBounds != null) {
8420 if (!first) {
8421 b.append(' ');
8422 }
8423 first = false;
8424 b.append("bnds=").append(mSourceBounds.toShortString());
8425 }
8426 if (mClipData != null) {
8427 if (!first) {
8428 b.append(' ');
8429 }
8430 b.append("clip={");
8431 if (clip) {
8432 mClipData.toShortString(b);
8433 } else {
8434 if (mClipData.getDescription() != null) {
8435 first = !mClipData.getDescription().toShortStringTypesOnly(b);
8436 } else {
8437 first = true;
8438 }
8439 mClipData.toShortStringShortItems(b, first);
8440 }
8441 first = false;
8442 b.append('}');
8443 }
8444 if (extras && mExtras != null) {
8445 if (!first) {
8446 b.append(' ');
8447 }
8448 first = false;
8449 b.append("(has extras)");
8450 }
8451 if (mContentUserHint != UserHandle.USER_CURRENT) {
8452 if (!first) {
8453 b.append(' ');
8454 }
8455 first = false;
8456 b.append("u=").append(mContentUserHint);
8457 }
8458 if (mSelector != null) {
8459 b.append(" sel=");
8460 mSelector.toShortString(b, secure, comp, extras, clip);
8461 b.append("}");
8462 }
8463 }
无参toUri，被废弃，等同于toUri(0)
8465 /**
8466 * Call {@link #toUri} with 0 flags.
8467 * @deprecated Use {@link #toUri} instead.
8468 */
8469 @Deprecated
8470 public String toURI() {
8471 return toUri(0);
8472 }
toUriInnter函数把Intent的几个私有变量里的值encode起来
8586 private void toUriInner(StringBuilder uri, String scheme, String defAction,
8587 String defPackage, int flags) {
8588 if (scheme != null) {
8589 uri.append("scheme=").append(scheme).append(';');
8590 }
8591 if (mAction != null && !mAction.equals(defAction)) {
8592 uri.append("action=").append(Uri.encode(mAction)).append(';');
8593 }
8594 if (mCategories != null) {
8595 for (int i=0; i<mCategories.size(); i++) {
8596 uri.append("category=").append(Uri.encode(mCategories.valueAt(i))).append(';');
8597 }
8598 }
8599 if (mType != null) {
8600 uri.append("type=").append(Uri.encode(mType, "/")).append(';');
8601 }
8602 if (mFlags != 0) {
8603 uri.append("launchFlags=0x").append(Integer.toHexString(mFlags)).append(';');
8604 }
8605 if (mPackage != null && !mPackage.equals(defPackage)) {
8606 uri.append("package=").append(Uri.encode(mPackage)).append(';');
8607 }
8608 if (mComponent != null) {
8609 uri.append("component=").append(Uri.encode(
8610 mComponent.flattenToShortString(), "/")).append(';');
8611 }
8612 if (mSourceBounds != null) {
8613 uri.append("sourceBounds=")
8614 .append(Uri.encode(mSourceBounds.flattenToString()))
8615 .append(';');
8616 }
8617 if (mExtras != null) {
8618 for (String key : mExtras.keySet()) {
8619 final Object value = mExtras.get(key);
8620 char entryType =
8621 value instanceof String ? 'S' :
8622 value instanceof Boolean ? 'B' :
8623 value instanceof Byte ? 'b' :
8624 value instanceof Character ? 'c' :
8625 value instanceof Double ? 'd' :
8626 value instanceof Float ? 'f' :
8627 value instanceof Integer ? 'i' :
8628 value instanceof Long ? 'l' :
8629 value instanceof Short ? 's' :
8630 '\0';
8631
8632 if (entryType != '\0') {
8633 uri.append(entryType);
8634 uri.append('.');
8635 uri.append(Uri.encode(key));
8636 uri.append('=');
8637 uri.append(Uri.encode(value.toString()));
8638 uri.append(';');
8639 }
8640 }
8641 }
8642 }
toUriFragment把Intet编码为“#Intent;***end”
8565 private void toUriFragment(StringBuilder uri, String scheme, String defAction,
8566 String defPackage, int flags) {
8567 StringBuilder frag = new StringBuilder(128);
8568
8569 toUriInner(frag, scheme, defAction, defPackage, flags);
8570 if (mSelector != null) {
8571 frag.append("SEL;");
8572 // Note that for now we are not going to try to handle the
8573 // data part; not clear how to represent this as a URI, and
8574 // not much utility in it.
8575 mSelector.toUriInner(frag, mSelector.mData != null ? mSelector.mData.getScheme() : null,
8576 null, null, flags);
8577 }
8578
8579 if (frag.length() > 0) {
8580 uri.append("#Intent;");
8581 uri.append(frag);
8582 uri.append("end");
8583 }
8584 }
toUri把一个Intent转换为Uri编码；flag决定转为为app模式的（前缀为android-app://）还是intetn模式的（前缀为intent）
8474 /**
8475 * Convert this Intent into a String holding a URI representation of it.
8476 * The returned URI string has been properly URI encoded, so it can be
8477 * used with {@link Uri#parse Uri.parse(String)}. The URI contains the
8478 * Intent's data as the base URI, with an additional fragment describing
8479 * the action, categories, type, flags, package, component, and extras.
8480 *
8481 * <p>You can convert the returned string back to an Intent with
8482 * {@link #getIntent}.
8483 *
8484 * @param flags Additional operating flags. Either 0,
8485 * {@link #URI_INTENT_SCHEME}, or {@link #URI_ANDROID_APP_SCHEME}.
8486 *
8487 * @return Returns a URI encoding URI string describing the entire contents
8488 * of the Intent.
8489 */
8490 public String toUri(int flags) {
8491 StringBuilder uri = new StringBuilder(128);
8492 if ((flags&URI_ANDROID_APP_SCHEME) != 0) {
8493 if (mPackage == null) {
8494 throw new IllegalArgumentException(
8495 "Intent must include an explicit package name to build an android-app: "
8496 + this);
8497 }
8498 uri.append("android-app://");
8499 uri.append(mPackage);
8500 String scheme = null;
8501 if (mData != null) {
8502 scheme = mData.getScheme();
8503 if (scheme != null) {
8504 uri.append('/');
8505 uri.append(scheme);
8506 String authority = mData.getEncodedAuthority();
8507 if (authority != null) {
8508 uri.append('/');
8509 uri.append(authority);
8510 String path = mData.getEncodedPath();
8511 if (path != null) {
8512 uri.append(path);
8513 }
8514 String queryParams = mData.getEncodedQuery();
8515 if (queryParams != null) {
8516 uri.append('?');
8517 uri.append(queryParams);
8518 }
8519 String fragment = mData.getEncodedFragment();
8520 if (fragment != null) {
8521 uri.append('#');
8522 uri.append(fragment);
8523 }
8524 }
8525 }
8526 }
8527 toUriFragment(uri, null, scheme == null ? Intent.ACTION_MAIN : Intent.ACTION_VIEW,
8528 mPackage, flags);
8529 return uri.toString();
8530 }
8531 String scheme = null;
8532 if (mData != null) {
8533 String data = mData.toString();
8534 if ((flags&URI_INTENT_SCHEME) != 0) {
8535 final int N = data.length();
8536 for (int i=0; i<N; i++) {
8537 char c = data.charAt(i);
8538 if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
8539 || c == '.' || c == '-') {
8540 continue;
8541 }
8542 if (c == ':' && i > 0) {
8543 // Valid scheme.
8544 scheme = data.substring(0, i);
8545 uri.append("intent:");
8546 data = data.substring(i+1);
8547 break;
8548 }
8549
8550 // No scheme.
8551 break;
8552 }
8553 }
8554 uri.append(data);
8555
8556 } else if ((flags&URI_INTENT_SCHEME) != 0) {
8557 uri.append("intent:");
8558 }
8559
8560 toUriFragment(uri, scheme, Intent.ACTION_VIEW, null, flags);
8561
8562 return uri.toString();
8563 }
下面是Parcelabel接口
describeContents返回的是返回的是mExtras的describeContents
8644 public int describeContents() {
8645 return (mExtras != null) ? mExtras.describeContents() : 0;
8646 }
writeToParcel写入关键 私有变量
8648 public void writeToParcel(Parcel out, int flags) {
8649 out.writeString(mAction);
8650 Uri.writeToParcel(out, mData);
8651 out.writeString(mType);
8652 out.writeInt(mFlags);
8653 out.writeString(mPackage);
8654 ComponentName.writeToParcel(mComponent, out);
8655
8656 if (mSourceBounds != null) {
8657 out.writeInt(1);
8658 mSourceBounds.writeToParcel(out, flags);
8659 } else {
8660 out.writeInt(0);
8661 }
8662
8663 if (mCategories != null) {
8664 final int N = mCategories.size();
8665 out.writeInt(N);
8666 for (int i=0; i<N; i++) {
8667 out.writeString(mCategories.valueAt(i));
8668 }
8669 } else {
8670 out.writeInt(0);
8671 }
8672
8673 if (mSelector != null) {
8674 out.writeInt(1);
8675 mSelector.writeToParcel(out, flags);
8676 } else {
8677 out.writeInt(0);
8678 }
8679
8680 if (mClipData != null) {
8681 out.writeInt(1);
8682 mClipData.writeToParcel(out, flags);
8683 } else {
8684 out.writeInt(0);
8685 }
8686 out.writeInt(mContentUserHint);
8687 out.writeBundle(mExtras);
8688 }
CREATOR接口如下
8690 public static final Parcelable.Creator<Intent> CREATOR
8691 = new Parcelable.Creator<Intent>() {
8692 public Intent createFromParcel(Parcel in) {
8693 return new Intent(in);
8694 }
8695 public Intent[] newArray(int size) {
8696 return new Intent[size];
8697 }
8698 }
以Parcel为参数的构造函数是私有的，调用readFromParcel
8700 /** @hide */
8701 protected Intent(Parcel in) {
8702 readFromParcel(in);
8703 }
8704
8705 public void readFromParcel(Parcel in) {
8706 setAction(in.readString());
8707 mData = Uri.CREATOR.createFromParcel(in);
8708 mType = in.readString();
8709 mFlags = in.readInt();
8710 mPackage = in.readString();
8711 mComponent = ComponentName.readFromParcel(in);
8712
8713 if (in.readInt() != 0) {
8714 mSourceBounds = Rect.CREATOR.createFromParcel(in);
8715 }
8716
8717 int N = in.readInt();
8718 if (N > 0) {
8719 mCategories = new ArraySet<String>();
8720 int i;
8721 for (i=0; i<N; i++) {
8722 mCategories.add(in.readString().intern());
8723 }
8724 } else {
8725 mCategories = null;
8726 }
8727
8728 if (in.readInt() != 0) {
8729 mSelector = new Intent(in);
8730 }
8731
8732 if (in.readInt() != 0) {
8733 mClipData = new ClipData(in);
8734 }
8735 mContentUserHint = in.readInt();
8736 mExtras = in.readBundle();
8737 }
parseIntetn会从xml里得到信息，new一个Intent并返回
8738
8739 /**
8740 * Parses the "intent" element (and its children) from XML and instantiates
8741 * an Intent object. The given XML parser should be located at the tag
8742 * where parsing should start (often named "intent"), from which the
8743 * basic action, data, type, and package and class name will be
8744 * retrieved. The function will then parse in to any child elements,
8745 * looking for <category android:name="xxx"> tags to add categories and
8746 * <extra android:name="xxx" android:value="yyy"> to attach extra data
8747 * to the intent.
8748 *
8749 * @param resources The Resources to use when inflating resources.
8750 * @param parser The XML parser pointing at an "intent" tag.
8751 * @param attrs The AttributeSet interface for retrieving extended
8752 * attribute data at the current <var>parser</var> location.
8753 * @return An Intent object matching the XML data.
8754 * @throws XmlPullParserException If there was an XML parsing error.
8755 * @throws IOException If there was an I/O error.
8756 */
8757 public static Intent parseIntent(Resources resources, XmlPullParser parser, AttributeSet attrs)
8758 throws XmlPullParserException, IOException {
8759 Intent intent = new Intent();
8760
8761 TypedArray sa = resources.obtainAttributes(attrs,
8762 com.android.internal.R.styleable.Intent);
8763
8764 intent.setAction(sa.getString(com.android.internal.R.styleable.Intent_action));
8765
8766 String data = sa.getString(com.android.internal.R.styleable.Intent_data);
8767 String mimeType = sa.getString(com.android.internal.R.styleable.Intent_mimeType);
8768 intent.setDataAndType(data != null ? Uri.parse(data) : null, mimeType);
8769
8770 String packageName = sa.getString(com.android.internal.R.styleable.Intent_targetPackage);
8771 String className = sa.getString(com.android.internal.R.styleable.Intent_targetClass);
8772 if (packageName != null && className != null) {
8773 intent.setComponent(new ComponentName(packageName, className));
8774 }
8775
8776 sa.recycle();
8777
8778 int outerDepth = parser.getDepth();
8779 int type;
8780 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
8781 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
8782 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
8783 continue;
8784 }
8785
8786 String nodeName = parser.getName();
8787 if (nodeName.equals(TAG_CATEGORIES)) {
8788 sa = resources.obtainAttributes(attrs,
8789 com.android.internal.R.styleable.IntentCategory);
8790 String cat = sa.getString(com.android.internal.R.styleable.IntentCategory_name);
8791 sa.recycle();
8792
8793 if (cat != null) {
8794 intent.addCategory(cat);
8795 }
8796 XmlUtils.skipCurrentTag(parser);
8797
8798 } else if (nodeName.equals(TAG_EXTRA)) {
8799 if (intent.mExtras == null) {
8800 intent.mExtras = new Bundle();
8801 }
8802 resources.parseBundleExtra(TAG_EXTRA, attrs, intent.mExtras);
8803 XmlUtils.skipCurrentTag(parser);
8804
8805 } else {
8806 XmlUtils.skipCurrentTag(parser);
8807 }
8808 }
8809
8810 return intent;
8811 }
saveToXml,把Intent的内容写如到xml里
8813 /** @hide */
8814 public void saveToXml(XmlSerializer out) throws IOException {
8815 if (mAction != null) {
8816 out.attribute(null, ATTR_ACTION, mAction);
8817 }
8818 if (mData != null) {
8819 out.attribute(null, ATTR_DATA, mData.toString());
8820 }
8821 if (mType != null) {
8822 out.attribute(null, ATTR_TYPE, mType);
8823 }
8824 if (mComponent != null) {
8825 out.attribute(null, ATTR_COMPONENT, mComponent.flattenToShortString());
8826 }
8827 out.attribute(null, ATTR_FLAGS, Integer.toHexString(getFlags()));
8828
8829 if (mCategories != null) {
8830 out.startTag(null, TAG_CATEGORIES);
8831 for (int categoryNdx = mCategories.size() - 1; categoryNdx >= 0; --categoryNdx) {
8832 out.attribute(null, ATTR_CATEGORY, mCategories.valueAt(categoryNdx));
8833 }
8834 out.endTag(null, TAG_CATEGORIES);
8835 }
8836 }
restoreFromXml则从xml里读取一系列的attribute
8838 /** @hide */
8839 public static Intent restoreFromXml(XmlPullParser in) throws IOException,
8840 XmlPullParserException {
8841 Intent intent = new Intent();
8842 final int outerDepth = in.getDepth();
8843
8844 int attrCount = in.getAttributeCount();
8845 for (int attrNdx = attrCount - 1; attrNdx >= 0; --attrNdx) {
8846 final String attrName = in.getAttributeName(attrNdx);
8847 final String attrValue = in.getAttributeValue(attrNdx);
8848 if (ATTR_ACTION.equals(attrName)) {
8849 intent.setAction(attrValue);
8850 } else if (ATTR_DATA.equals(attrName)) {
8851 intent.setData(Uri.parse(attrValue));
8852 } else if (ATTR_TYPE.equals(attrName)) {
8853 intent.setType(attrValue);
8854 } else if (ATTR_COMPONENT.equals(attrName)) {
8855 intent.setComponent(ComponentName.unflattenFromString(attrValue));
8856 } else if (ATTR_FLAGS.equals(attrName)) {
8857 intent.setFlags(Integer.parseInt(attrValue, 16));
8858 } else {
8859 Log.e("Intent", "restoreFromXml: unknown attribute=" + attrName);
8860 }
8861 }
8862
8863 int event;
8864 String name;
8865 while (((event = in.next()) != XmlPullParser.END_DOCUMENT) &&
8866 (event != XmlPullParser.END_TAG || in.getDepth() < outerDepth)) {
8867 if (event == XmlPullParser.START_TAG) {
8868 name = in.getName();
8869 if (TAG_CATEGORIES.equals(name)) {
8870 attrCount = in.getAttributeCount();
8871 for (int attrNdx = attrCount - 1; attrNdx >= 0; --attrNdx) {
8872 intent.addCategory(in.getAttributeValue(attrNdx));
8873 }
8874 } else {
8875 Log.w("Intent", "restoreFromXml: unknown name=" + name);
8876 XmlUtils.skipCurrentTag(in);
8877 }
8878 }
8879 }
8880
8881 return intent;
8882 }
normalizedMimeType把Mime去掉空格，小写，去掉内容类型参数
8884 /**
8885 * Normalize a MIME data type.
8886 *
8887 * <p>A normalized MIME type has white-space trimmed,
8888 * content-type parameters removed, and is lower-case.
8889 * This aligns the type with Android best practices for
8890 * intent filtering.
8891 *
8892 * <p>For example, "text/plain; charset=utf-8" becomes "text/plain".
8893 * "text/x-vCard" becomes "text/x-vcard".
8894 *
8895 * <p>All MIME types received from outside Android (such as user input,
8896 * or external sources like Bluetooth, NFC, or the Internet) should
8897 * be normalized before they are used to create an Intent.
8898 *
8899 * @param type MIME data type to normalize
8900 * @return normalized MIME data type, or null if the input was null
8901 * @see #setType
8902 * @see #setTypeAndNormalize
8903 */
8904 public static String normalizeMimeType(String type) {
8905 if (type == null) {
8906 return null;
8907 }
8908
8909 type = type.trim().toLowerCase(Locale.ROOT);
8910
8911 final int semicolonIndex = type.indexOf(';');
8912 if (semicolonIndex != -1) {
8913 type = type.substring(0, semicolonIndex);
8914 }
8915 return type;
8916 }
prepareLeaveProcess为Intent离开当前进程做准备，修正可能暴露的Uri；prepareToEnterProcess针对当前进程UID不是sytem的情况，调用fixUris，并设置mContentUserHint
8918 /**
8919 * Prepare this {@link Intent} to leave an app process.
8920 *
8921 * @hide
8922 */
8923 public void prepareToLeaveProcess(Context context) {
8924 final boolean leavingPackage = (mComponent == null)
8925 || !Objects.equals(mComponent.getPackageName(), context.getPackageName());
8926 prepareToLeaveProcess(leavingPackage);
8927 }
8928
8929 /**
8930 * Prepare this {@link Intent} to leave an app process.
8931 *
8932 * @hide
8933 */
8934 public void prepareToLeaveProcess(boolean leavingPackage) {
8935 setAllowFds(false);
8936
8937 if (mSelector != null) {
8938 mSelector.prepareToLeaveProcess(leavingPackage);
8939 }
8940 if (mClipData != null) {
8941 mClipData.prepareToLeaveProcess(leavingPackage);
8942 }
8943
8944 if (mAction != null && mData != null && StrictMode.vmFileUriExposureEnabled()
8945 && leavingPackage) {
8946 switch (mAction) {
8947 case ACTION_MEDIA_REMOVED:
8948 case ACTION_MEDIA_UNMOUNTED:
8949 case ACTION_MEDIA_CHECKING:
8950 case ACTION_MEDIA_NOFS:
8951 case ACTION_MEDIA_MOUNTED:
8952 case ACTION_MEDIA_SHARED:
8953 case ACTION_MEDIA_UNSHARED:
8954 case ACTION_MEDIA_BAD_REMOVAL:
8955 case ACTION_MEDIA_UNMOUNTABLE:
8956 case ACTION_MEDIA_EJECT:
8957 case ACTION_MEDIA_SCANNER_STARTED:
8958 case ACTION_MEDIA_SCANNER_FINISHED:
8959 case ACTION_MEDIA_SCANNER_SCAN_FILE:
8960 case ACTION_PACKAGE_NEEDS_VERIFICATION:
8961 case ACTION_PACKAGE_VERIFIED:
8962 // Ignore legacy actions
8963 break;
8964 default:
8965 mData.checkFileUriExposed("Intent.getData()");
8966 }
8967 }
8968 }
8969
8970 /**
8971 * @hide
8972 */
8973 public void prepareToEnterProcess() {
8974 // We just entered destination process, so we should be able to read all
8975 // parcelables inside.
8976 setDefusable(true);
8977
8978 if (mSelector != null) {
8979 mSelector.prepareToEnterProcess();
8980 }
8981 if (mClipData != null) {
8982 mClipData.prepareToEnterProcess();
8983 }
8984
8985 if (mContentUserHint != UserHandle.USER_CURRENT) {
8986 if (UserHandle.getAppId(Process.myUid()) != Process.SYSTEM_UID) {
8987 fixUris(mContentUserHint);
8988 mContentUserHint = UserHandle.USER_CURRENT;
8989 }
8990 }
8991 }
fixUris讲可能的UserId加进Uri里
8993 /**
8994 * @hide
8995 */
8996 public void fixUris(int contentUserHint) {
8997 Uri data = getData();
8998 if (data != null) {
8999 mData = maybeAddUserId(data, contentUserHint);
9000 }
9001 if (mClipData != null) {
9002 mClipData.fixUris(contentUserHint);
9003 }
9004 String action = getAction();
9005 if (ACTION_SEND.equals(action)) {
9006 final Uri stream = getParcelableExtra(EXTRA_STREAM);
9007 if (stream != null) {
9008 putExtra(EXTRA_STREAM, maybeAddUserId(stream, contentUserHint));
9009 }
9010 } else if (ACTION_SEND_MULTIPLE.equals(action)) {
9011 final ArrayList<Uri> streams = getParcelableArrayListExtra(EXTRA_STREAM);
9012 if (streams != null) {
9013 ArrayList<Uri> newStreams = new ArrayList<Uri>();
9014 for (int i = 0; i < streams.size(); i++) {
9015 newStreams.add(maybeAddUserId(streams.get(i), contentUserHint));
9016 }
9017 putParcelableArrayListExtra(EXTRA_STREAM, newStreams);
9018 }
9019 } else if (MediaStore.ACTION_IMAGE_CAPTURE.equals(action)
9020 || MediaStore.ACTION_IMAGE_CAPTURE_SECURE.equals(action)
9021 || MediaStore.ACTION_VIDEO_CAPTURE.equals(action)) {
9022 final Uri output = getParcelableExtra(MediaStore.EXTRA_OUTPUT);
9023 if (output != null) {
9024 putExtra(MediaStore.EXTRA_OUTPUT, maybeAddUserId(output, contentUserHint));
9025 }
9026 }
9027 }
migrateExtraStreamToClipData从Steam构建ClipData
9029 /**
9030 * Migrate any {@link #EXTRA_STREAM} in {@link #ACTION_SEND} and
9031 * {@link #ACTION_SEND_MULTIPLE} to {@link ClipData}. Also inspects nested
9032 * intents in {@link #ACTION_CHOOSER}.
9033 *
9034 * @return Whether any contents were migrated.
9035 * @hide
9036 */
9037 public boolean migrateExtraStreamToClipData() {
9038 // Refuse to touch if extras already parcelled
9039 if (mExtras != null && mExtras.isParcelled()) return false;
9040
9041 // Bail when someone already gave us ClipData
9042 if (getClipData() != null) return false;
9043
9044 final String action = getAction();
9045 if (ACTION_CHOOSER.equals(action)) {
9046 // Inspect contained intents to see if we need to migrate extras. We
9047 // don't promote ClipData to the parent, since ChooserActivity will
9048 // already start the picked item as the caller, and we can't combine
9049 // the flags in a safe way.
9050
9051 boolean migrated = false;
9052 try {
9053 final Intent intent = getParcelableExtra(EXTRA_INTENT);
9054 if (intent != null) {
9055 migrated |= intent.migrateExtraStreamToClipData();
9056 }
9057 } catch (ClassCastException e) {
9058 }
9059 try {
9060 final Parcelable[] intents = getParcelableArrayExtra(EXTRA_INITIAL_INTENTS);
9061 if (intents != null) {
9062 for (int i = 0; i < intents.length; i++) {
9063 final Intent intent = (Intent) intents[i];
9064 if (intent != null) {
9065 migrated |= intent.migrateExtraStreamToClipData();
9066 }
9067 }
9068 }
9069 } catch (ClassCastException e) {
9070 }
9071 return migrated;
9072
9073 } else if (ACTION_SEND.equals(action)) {
9074 try {
9075 final Uri stream = getParcelableExtra(EXTRA_STREAM);
9076 final CharSequence text = getCharSequenceExtra(EXTRA_TEXT);
9077 final String htmlText = getStringExtra(EXTRA_HTML_TEXT);
9078 if (stream != null || text != null || htmlText != null) {
9079 final ClipData clipData = new ClipData(
9080 null, new String[] { getType() },
9081 new ClipData.Item(text, htmlText, null, stream));
9082 setClipData(clipData);
9083 addFlags(FLAG_GRANT_READ_URI_PERMISSION);
9084 return true;
9085 }
9086 } catch (ClassCastException e) {
9087 }
9088
9089 } else if (ACTION_SEND_MULTIPLE.equals(action)) {
9090 try {
9091 final ArrayList<Uri> streams = getParcelableArrayListExtra(EXTRA_STREAM);
9092 final ArrayList<CharSequence> texts = getCharSequenceArrayListExtra(EXTRA_TEXT);
9093 final ArrayList<String> htmlTexts = getStringArrayListExtra(EXTRA_HTML_TEXT);
9094 int num = -1;
9095 if (streams != null) {
9096 num = streams.size();
9097 }
9098 if (texts != null) {
9099 if (num >= 0 && num != texts.size()) {
9100 // Wha...! F- you.
9101 return false;
9102 }
9103 num = texts.size();
9104 }
9105 if (htmlTexts != null) {
9106 if (num >= 0 && num != htmlTexts.size()) {
9107 // Wha...! F- you.
9108 return false;
9109 }
9110 num = htmlTexts.size();
9111 }
9112 if (num > 0) {
9113 final ClipData clipData = new ClipData(
9114 null, new String[] { getType() },
9115 makeClipItem(streams, texts, htmlTexts, 0));
9116
9117 for (int i = 1; i < num; i++) {
9118 clipData.addItem(makeClipItem(streams, texts, htmlTexts, i));
9119 }
9120
9121 setClipData(clipData);
9122 addFlags(FLAG_GRANT_READ_URI_PERMISSION);
9123 return true;
9124 }
9125 } catch (ClassCastException e) {
9126 }
9127 } else if (MediaStore.ACTION_IMAGE_CAPTURE.equals(action)
9128 || MediaStore.ACTION_IMAGE_CAPTURE_SECURE.equals(action)
9129 || MediaStore.ACTION_VIDEO_CAPTURE.equals(action)) {
9130 final Uri output;
9131 try {
9132 output = getParcelableExtra(MediaStore.EXTRA_OUTPUT);
9133 } catch (ClassCastException e) {
9134 return false;
9135 }
9136 if (output != null) {
9137 setClipData(ClipData.newRawUri("", output));
9138 addFlags(FLAG_GRANT_WRITE_URI_PERMISSION|FLAG_GRANT_READ_URI_PERMISSION);
9139 return true;
9140 }
9141 }
9142
9143 return false;
9144 }
9145
makeClipItem从stream，text，htmltext里构建ClipData
9146 private static ClipData.Item makeClipItem(ArrayList<Uri> streams, ArrayList<CharSequence> texts,
9147 ArrayList<String> htmlTexts, int which) {
9148 Uri uri = streams != null ? streams.get(which) : null;
9149 CharSequence text = texts != null ? texts.get(which) : null;
9150 String htmlText = htmlTexts != null ? htmlTexts.get(which) : null;
9151 return new ClipData.Item(text, htmlText, null, uri);
9152 }
isDocument判断flag是否为FALG_ACTIVITY_NEW_DOCUMENT
9154 /** @hide */
9155 public boolean isDocument() {
9156 return (mFlags & FLAG_ACTIVITY_NEW_DOCUMENT) == FLAG_ACTIVITY_NEW_DOCUMENT;
9157 }
9158}
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