02_电话拨号器intent说明
怎么在第一个Activity打开第二个Activity？在一个Activity中打开另外一个Activity，实际上之前已经做过，就是电话拨号器。
package com.itheima.callnewactivity; import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View; public class MainActivity extends Activity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
} public void call(View v){
Intent intent = new Intent();
//给意图设置一个动作
intent.setAction(Intent.ACTION_CALL);
//给意图设置数据
intent.setData(Uri.parse("tel:"+110));
//打开打电话的activity
startActivity(intent); } }
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" > <Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="call"
android:text="@string/hello_world" /> </RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.itheima.callnewactivity"
android:versionCode="1"
android:versionName="1.0" > <uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.CALL_PHONE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.itheima.callnewactivity.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application> </manifest>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" > <Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="call"
android:text="打电话" /> </RelativeLayout>
系统上层所有应用的源代码，实际上就是跟电话还有短信这些相关的。Browser是浏览器，Launcher2是桌面的这个应用。
实际上你最开始运行起来就是这个桌面，这个桌面对应的也是一个安卓应用。这个应用它的作用就是把其他的应用跑起来。
Mms是短信的，PackageInstaller是包安装器。咱们装应用的时候都会出来一个界面，这个界面介绍当前你装的东西是什么名字，会用到哪些权限，这个东西就是这个PackageInstaller。
Phone就是打电话的。
TelephonyProvider就是提供跟电话相关的一些信息。内容提供者相关。
Settings 设置的。
每调起一个应用默认都会在All messages(no filters)帮咱们打一个log，就是我调起来的是谁。
ActivityManager，通过它就可以看到我究竟都打开了哪一些应用。
<activity android:name="OutgoingCallBroadcaster"
android:permission="android.permission.CALL_PHONE"
android:theme="@android:style/Theme.NoDisplay"
android:configChanges="orientation|keyboardHidden">
<!-- CALL action intent filters, for the various ways
of initiating an outgoing call. -->
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="tel" />
</intent-filter>
<intent-filter android:icon="@drawable/ic_launcher_sip_call">
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="sip" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="voicemail" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/phone" />
<data android:mimeType="vnd.android.cursor.item/phone_v2" />
<data android:mimeType="vnd.android.cursor.item/person" />
</intent-filter>
</activity>
它声明了一个CALL_PHONE的权限，所以你调起这个activity的时候必须在你的应用申请对应的权限。
数据以tel开头和scheme对上了。
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="tel" />
</intent-filter>
通过startActivity就可以把当前的这个intent-filter所对应的Activity给它打开。
PHONE这个系统上层的应用的源代码的清单文件是：
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--> <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.phone"
android:sharedUserId="android.uid.phone"
android:sharedUserLabel="@string/dialerIconLabel"
> <original-package android:name="com.android.phone" /> <protected-broadcast android:name="android.intent.action.SERVICE_STATE" />
<protected-broadcast android:name="android.intent.action.RADIO_TECHNOLOGY" />
<protected-broadcast android:name="android.intent.action.EMERGENCY_CALLBACK_MODE_CHANGED" />
<protected-broadcast android:name="android.intent.action.SIG_STR" />
<protected-broadcast android:name="android.intent.action.ANY_DATA_STATE" />
<protected-broadcast android:name="android.intent.action.DATA_CONNECTION_FAILED" />
<protected-broadcast android:name="android.intent.action.SIM_STATE_CHANGED" />
<protected-broadcast android:name="android.intent.action.NETWORK_SET_TIME" />
<protected-broadcast android:name="android.intent.action.NETWORK_SET_TIMEZONE" />
<protected-broadcast android:name="android.intent.action.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS" />
<protected-broadcast android:name="android.intent.action.ACTION_MDN_STATE_CHANGED" />
<protected-broadcast android:name="android.provider.Telephony.SPN_STRINGS_UPDATED" /> <uses-permission android:name="android.permission.BROADCAST_STICKY" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.CALL_PRIVILEGED" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.INTERNAL_SYSTEM_WINDOW" />
<uses-permission android:name="android.permission.ADD_SYSTEM_SERVICE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.REORDER_TASKS" />
<uses-permission android:name="android.permission.CHANGE_CONFIGURATION" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.STATUS_BAR" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.SET_TIME_ZONE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
<uses-permission android:name="android.permission.DEVICE_POWER" />
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_APN_SETTINGS" />
<uses-permission android:name="android.permission.BROADCAST_SMS"/>
<uses-permission android:name="android.permission.BROADCAST_WAP_PUSH"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.SHUTDOWN" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.BACKUP" />
<uses-permission android:name="android.permission.USE_SIP" /> <!-- This tells the activity manager to not delay any of our activity
start requests, even if they happen immediately after the user
presses home. -->
<uses-permission android:name="android.permission.STOP_APP_SWITCHES" /> <application android:name="PhoneApp"
android:persistent="true"
android:label="@string/dialerIconLabel"
android:icon="@drawable/ic_launcher_phone">
<provider android:name="IccProvider"
android:authorities="icc"
android:multiprocess="true"
android:readPermission="android.permission.READ_CONTACTS"
android:writePermission="android.permission.WRITE_CONTACTS" /> <!-- Dialer UI that only allows emergency calls -->
<activity android:name="EmergencyDialer"
android:label="@string/emergencyDialerIconLabel"
android:screenOrientation="nosensor">
<intent-filter>
<action android:name="com.android.phone.EmergencyDialer.DIAL" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity> <activity android:name="ADNList" /> <activity android:name="SimContacts"
android:label="@string/simContacts_title"> <intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/sim-contact" />
</intent-filter>
</activity> <activity android:name="FdnList" android:label="@string/fdnListLabel">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/sim-contact" />
</intent-filter>
</activity> <activity android:name="OutgoingCallBroadcaster"
android:permission="android.permission.CALL_PHONE"
android:theme="@android:style/Theme.NoDisplay"
android:configChanges="orientation|keyboardHidden">
<!-- CALL action intent filters, for the various ways
of initiating an outgoing call. -->
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="tel" />
</intent-filter>
<intent-filter android:icon="@drawable/ic_launcher_sip_call">
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="sip" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="voicemail" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/phone" />
<data android:mimeType="vnd.android.cursor.item/phone_v2" />
<data android:mimeType="vnd.android.cursor.item/person" />
</intent-filter>
</activity>
<activity-alias android:name="EmergencyOutgoingCallBroadcaster"
android:targetActivity="OutgoingCallBroadcaster"
android:permission="android.permission.CALL_PRIVILEGED"
android:theme="@android:style/Theme.NoDisplay">
<intent-filter>
<action android:name="android.intent.action.CALL_EMERGENCY" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="tel" />
</intent-filter>
<intent-filter android:icon="@drawable/ic_launcher_sip_call">
<action android:name="android.intent.action.CALL_EMERGENCY" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="sip" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL_EMERGENCY" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="voicemail" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL_EMERGENCY" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/phone" />
<data android:mimeType="vnd.android.cursor.item/person" />
</intent-filter>
</activity-alias> <activity-alias android:name="PrivilegedOutgoingCallBroadcaster"
android:targetActivity="OutgoingCallBroadcaster"
android:theme="@android:style/Theme.NoDisplay"
android:permission="android.permission.CALL_PRIVILEGED">
<intent-filter>
<action android:name="android.intent.action.CALL_PRIVILEGED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="tel" />
</intent-filter>
<intent-filter android:icon="@drawable/ic_launcher_sip_call">
<action android:name="android.intent.action.CALL_PRIVILEGED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="sip" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL_PRIVILEGED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="voicemail" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.CALL_PRIVILEGED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/phone" />
<data android:mimeType="vnd.android.cursor.item/phone_v2" />
<data android:mimeType="vnd.android.cursor.item/person" />
</intent-filter>
</activity-alias> <receiver android:name="ProcessOutgoingCallTest" android:exported="false"
android:enabled="false">
<intent-filter android:priority="1">
<action android:name="android.intent.action.NEW_OUTGOING_CALL" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver> <activity android:name="InCallScreen"
android:theme="@android:style/Theme.NoTitleBar"
android:label="@string/phoneIconLabel"
android:excludeFromRecents="true"
android:launchMode="singleInstance"
android:screenOrientation="portrait"
android:configChanges="orientation|keyboardHidden|uiMode"
android:exported="false">
</activity> <activity android:name="InCallScreenShowActivation"
android:permission="android.permission.PERFORM_CDMA_PROVISIONING"
android:label="@string/phoneIconLabel"
android:excludeFromRecents="true">
<intent-filter>
<action android:name="com.android.phone.InCallScreen.SHOW_ACTIVATION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity> <!-- general settings -->
<activity android:name="Settings" android:label="@string/settings_label">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.MAIN" />
<action android:name="android.settings.DATA_ROAMING_SETTINGS" />
</intent-filter>
</activity> <!-- networks setting -->
<!-- service to handle network query requests sent to RIL -->
<service android:name="NetworkQueryService" /> <activity android:name="NetworkSetting"
android:label="@string/networks"
android:configChanges="orientation|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.settings.NETWORK_OPERATOR_" />
</intent-filter>
</activity> <activity android:name="GsmUmtsOptions"
android:label="@string/gsm_umts_options">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <activity android:name="CdmaOptions"
android:label="@string/cdma_options">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <activity android:name="GsmUmtsCallOptions"
android:label="@string/gsm_umts_options">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <activity android:name="CdmaCallOptions"
android:label="@string/cdma_options">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <activity android:name="GsmUmtsCallForwardOptions"
android:label="@string/labelCF"
android:configChanges="orientation|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <activity android:name="GsmUmtsAdditionalCallOptions"
android:label="@string/labelGSMMore"
android:configChanges="orientation|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <activity android:name="CellBroadcastSms"
android:label="@string/cell_broadcast_sms">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <!-- fdn setting -->
<activity android:name="FdnSetting" android:label="@string/fdn">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <activity android:name="EnableFdnScreen" android:label="">
</activity> <!-- SIM PIN setting -->
<activity android:name="EnableIccPinScreen" android:label="@string/enable_pin">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEVELOPMENT_PREFERENCE" />
</intent-filter>
</activity> <activity android:name="ChangeIccPinScreen" android:label="@string/change_pin">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEVELOPMENT_PREFERENCE" />
</intent-filter>
</activity> <activity android:name="GetPin2Screen" android:label="@string/get_pin2"
android:windowSoftInputMode="stateVisible">
</activity> <activity android:name="EditFdnContactScreen"
android:windowSoftInputMode="stateVisible">
</activity> <activity android:name="DeleteFdnContactScreen"
android:label="@string/delete_fdn_contact">
</activity> <activity android:name="DataRoamingReenable" android:label="@string/android:dialog_alert_title"
android:theme="@android:style/Theme.Dialog">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <!-- Data usage and throttling setting -->
<activity android:name="DataUsage"
android:label="@string/throttle_data_usage">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <!-- data roaming setting -->
<activity android:name="RoamingSetting" android:label="@string/roaming">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity> <!-- call feature setting -->
<activity android:name="CallFeaturesSetting" android:label="@string/call_settings"
android:configChanges="orientation|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.MAIN" />
<action android:name="com.android.phone.CallFeaturesSetting.ADD_VOICEMAIL" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity> <!-- emergency call handler, coordinates emergency calls -->
<activity android:name="EmergencyCallHandler" android:label="@string/phoneIconLabel"
android:excludeFromRecents="true"
android:launchMode="singleInstance">
</activity> <!-- bluetooth headset service -->
<service android:name="BluetoothHeadsetService">
<intent-filter>
<action android:name="android.bluetooth.IBluetoothHeadset" />
</intent-filter>
</service> <!-- Broadcast Receiver that will process BOOT Complete and launch OTA -->
<receiver android:name="OtaStartupReceiver" android:exported="false">
<intent-filter android:priority="100">
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver> <!-- CDMA Emergency Callback Mode -->
<service android:name="EmergencyCallbackModeService">
</service> <activity android:name="EmergencyCallbackModeExitDialog"
android:excludeFromRecents="true"
android:label="@string/ecm_exit_dialog"
android:launchMode="singleTop"
android:theme="@android:style/Theme.Translucent.NoTitleBar">
<intent-filter>
<action android:name="com.android.phone.action.ACTION_SHOW_ECM_EXIT_DIALOG" />
<action android:name="android.intent.action.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity> <receiver android:name="SipBroadcastReceiver">
<intent-filter>
<action android:name="com.android.phone.SIP_INCOMING_CALL" />
<action android:name="com.android.phone.SIP_ADD_PHONE" />
<action android:name="com.android.phone.SIP_REMOVE_PHONE" />
<action android:name="android.net.sip.SIP_SERVICE_UP" />
</intent-filter>
</receiver> <activity android:label="Sip Settings"
android:name=".sip.SipSettings"
android:launchMode="singleTop"
android:configChanges="orientation|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.net.sip.NOTIFY" />
</intent-filter>
</activity>
<activity android:name=".sip.SipEditor"
android:configChanges="orientation|keyboardHidden">
</activity>
<activity android:name=".SipCallOptionHandler"
android:configChanges="orientation|keyboardHidden">
</activity> </application>
</manifest>
02_电话拨号器intent说明的更多相关文章
- Mono for Android—初体验之“电话拨号器”
1.Main.axml文件: <?xml version="1.0" encoding="utf-8"?><LinearLayout xmln ...
- [Android]电话拨号器开发
继续今天的Android,经过昨天大体了解了Android开发的一些基本文件结构,今天来做一个电话拨号器! 预期达到的效果 实现过程 首先还是按照昨天第一篇教程,新建一个项目叫PhoneCall的An ...
- android案例一 电话拨号器
效果图: 电话拨号器的核心原理: 意图 MainActivity代码: private EditTest et_number; //加载一个布局 setContentView(R.l ...
- 无废话Android之常见adb指令、电话拨号器、点击事件的4种写法、短信发送器、Android 中各种布局（1）
1.Android是什么 手机设备的软件栈,包括一个完整的操作系统.中间件.关键的应用程序,底层是linux内核,安全管理.内存管理.进程管理.电源管理.硬件驱动 2.Dalvik VM 和 JVM ...
- android之电话拨号器
在android入门的案例中,除了HelloWorld这个经典案例,还有一个电话拨号器需要掌握,现在我就来个电话拨号器的示范,毕竟大牛也是从菜鸟进化而来的. 首先你应该知道自己要设置怎样的UI,然后创 ...
- Android入门——电话拨号器和四种点击事件
相对于HelloWorld来说,电话拨号器也是Android的一个入门demo,从这个样例我们要理清楚做安卓项目的思路. 大体分为三步: 1.理解需求,理清思路 2.设计UI 3.代码实现 电话拨号器 ...
- android 电话拨号器
电话拨号器(重点) 1.产品经理: 需求分析文档,设计原型图 2.UI工程师: 设计UI界面 3.架构师: 写架构,接口文档 4.码农: 服务端,客户端 ...
- Android学习之电话拨号器
本人自己是做android驱动的,也会接触到系统层.上层的应用,所以在闲暇的时候也就开始了学习android应用的路程,在这里把这些东西记下来,希望自己能坚持下去,也好以后复习用. 今天先实现一个简单 ...
- Android入门——电话拨号器和4种点击事件
关于HelloWorld为,电话拨号程序还AndroidA入门demo,从这个样例我们要理清楚做安卓项目的思路. 大体分为三步: 1.理解需求,理清思路 2.设计UI 3.代码实现 电话拨号器 1. ...
随机推荐
- android GET 请求在5.0版本的取不到数据，报IO异常兼容问题解决
使用lib类库xUtils-2.6.10.jar作为数据请求的框架,在android的5.0版会有兼容问题,取不到GET请求的数据. 但是POST没有问题,难取到数据. public static R ...
- vscode 打开新文件覆盖窗口，始终显示一个窗口
一直在使用vscode 编辑器,里面的扩展用的比较舒服,但是最近遇到一个小问题,一直也没有找好的解决办法,今天无意中把问题给解决了.具体如下 之前使用编辑器,可以同时打开多个文件,而且是多窗口展示的, ...
- oc温习二：基本运算及基本运算符
C语言一共有34种运算符,如下: 运算符分类: 1.按照功能划分: (1)算术运算符 + 加法运算符 - 减法运算符 或者负值运算符 * 乘法运算符 / 除法运算符 % 模运算符,或者取余运算符,要求 ...
- ArrayList和LinkedList区别（蚂蚁金服面试题）
1. 是否保证线程安全: ArrayList 和 LinkedList 都是不同步的,也就是不保证线程安全: 2. 底层数据结构: Arraylist 底层使用的是Object数组:LinkedLis ...
- Django学习系列之request对象
先来一个简单的实例 urls.py from django.conf.urls import url from django.contrib import admin from cmdb import ...
- [RxJS] `add` Inner Subscriptions to Outer Subscribers to `unsubscribe` in RxJS
When subscribers create new "inner" sources and subscriptions, you run the risk of losing ...
- Visual Studio VS如何修改代码字体
工具-选项-环境-字体和颜色
- lightoj 1138 - Trailing Zeroes (III)【二分】
题目链接:http://lightoj.com/volume_showproblem.php? problem=1138 题意:问 N. 末尾 0 的个数为 Q 个的数是什么? 解法:二分枚举N,由于 ...
- iOS开发-UITableView单选多选/复选实现1
TableView怎样实现单选或者多选呢? 我们的直接思路是改动某一个Cell的样式就可以, 那么改动样式须要通过改动相应的数据, 从这里能够判断我们须要给Cell相应的数据设置一个标志位, 当选中的 ...
- Swift基础一(代码)
import Foundation println("Hello, World!") var string1 = "Hello BeiJing" //定义一个变 ...