如何忽略usb host 模式设备连接确认对话框
<li class="alt"><span><span>package android.hardware.usb; </span></span></li><li class=""><span> </span></li><li class="alt"><span>public interface IUsbManager extends android.os.IInterface </span></li><li class=""><span>{ </span></li><li class="alt"><span> /** Local-side IPC implementation stub class. */ </span></li><li class=""><span> public static abstract class Stub extends android.os.Binder implements android.hardware.usb.IUsbManager </span></li><li class="alt"><span> { </span></li><li class=""><span> /** Construct the stub at attach it to the interface. */ </span></li><li class="alt"><span> public Stub() </span></li><li class=""><span> { </span></li><li class="alt"><span> throw new RuntimeException( "Stub!" ); </span></li><li class=""><span> } </span></li><li class="alt"><span> /** </span></li><li class=""><span> * Cast an IBinder object into an android.hardware.usb.IUsbManager interface, </span></li><li class="alt"><span> * generating a proxy if needed. </span></li><li class=""><span> */ </span></li><li class="alt"><span> public static android.hardware.usb.IUsbManager asInterface( android.os.IBinder obj ) </span></li><li class=""><span> { </span></li><li class="alt"><span> throw new RuntimeException( "Stub!" ); </span></li><li class=""><span> } </span></li><li class="alt"><span> </span></li><li class=""><span> public android.os.IBinder asBinder() </span></li><li class="alt"><span> { </span></li><li class=""><span> throw new RuntimeException( "Stub!" ); </span></li><li class="alt"><span> } </span></li><li class=""><span> </span></li><li class="alt"><span> public boolean onTransact( int code, android.os.Parcel data, android.os.Parcel reply, int flags ) throws android.os.RemoteException </span></li><li class=""><span> { </span></li><li class="alt"><span> throw new RuntimeException( "Stub!" ); </span></li><li class=""><span> } </span></li><li class="alt"><span> </span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_getDeviceList</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_openDevice</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1); </span></span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_getCurrentAccessory</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 2); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_openAccessory</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 3); </span></span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_setDevicePackage</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 4); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_setAccessoryPackage</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 5); </span></span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_hasDevicePermission</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 6); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_hasAccessoryPermission</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 7); </span></span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_requestDevicePermission</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 8); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_requestAccessoryPermission</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 9); </span></span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_grantDevicePermission</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 10); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_grantAccessoryPermission</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 11); </span></span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_hasDefaults</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 12); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_clearDefaults</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 13); </span></span></li><li class=""><span> static final int <span class="attribute">TRANSACTION_setCurrentFunction</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 14); </span></span></li><li class="alt"><span> static final int <span class="attribute">TRANSACTION_setMassStorageBackingFile</span><span> = (android.os.IBinder.FIRST_CALL_TRANSACTION + 15); </span></span></li><li class=""><span> } </span></li><li class="alt"><span> </span></li><li class=""><span> /* Returns a list of all currently attached USB devices */ </span></li><li class="alt"><span> public void getDeviceList( android.os.Bundle devices ) throws android.os.RemoteException; </span></li><li class=""><span> /* Returns a file descriptor for communicating with the USB device. </span></li><li class="alt"><span> * The native fd can be passed to usb_device_new() in libusbhost. </span></li><li class=""><span> */ </span></li><li class="alt"><span> public android.os.ParcelFileDescriptor openDevice( java.lang.String deviceName ) throws android.os.RemoteException; </span></li><li class=""><span> /* Returns the currently attached USB accessory */ </span></li><li class="alt"><span> public android.hardware.usb.UsbAccessory getCurrentAccessory() throws android.os.RemoteException; </span></li><li class=""><span> /* Returns a file descriptor for communicating with the USB accessory. </span></li><li class="alt"><span> * This file descriptor can be used with standard Java file operations. </span></li><li class=""><span> */ </span></li><li class="alt"><span> public android.os.ParcelFileDescriptor openAccessory( android.hardware.usb.UsbAccessory accessory ) throws android.os.RemoteException; </span></li><li class=""><span> /* Sets the default package for a USB device </span></li><li class="alt"><span> * (or clears it if the package name is null) </span></li><li class=""><span> */ </span></li><li class="alt"><span> public void setDevicePackage( android.hardware.usb.UsbDevice device, java.lang.String packageName ) throws android.os.RemoteException; </span></li><li class=""><span> /* Sets the default package for a USB accessory </span></li><li class="alt"><span> * (or clears it if the package name is null) </span></li><li class=""><span> */ </span></li><li class="alt"><span> public void setAccessoryPackage( android.hardware.usb.UsbAccessory accessory, java.lang.String packageName ) throws android.os.RemoteException; </span></li><li class=""><span> /* Returns true if the caller has permission to access the device. */ </span></li><li class="alt"><span> public boolean hasDevicePermission(android.hardware.usb.UsbDevice device) throws android.os.RemoteException; </span></li><li class=""><span> /* Returns true if the caller has permission to access the accessory. */ </span></li><li class="alt"><span> public boolean hasAccessoryPermission( android.hardware.usb.UsbAccessory accessory ) throws android.os.RemoteException; </span></li><li class=""><span> /* Requests permission for the given package to access the device. </span></li><li class="alt"><span> * Will display a system dialog to query the user if permission </span></li><li class=""><span> * had not already been given. </span></li><li class="alt"><span> */ </span></li><li class=""><span> public void requestDevicePermission( android.hardware.usb.UsbDevice device, java.lang.String packageName, android.app.PendingIntent pi ) throws android.os.RemoteException; </span></li><li class="alt"><span> /* Requests permission for the given package to access the accessory. </span></li><li class=""><span> * Will display a system dialog to query the user if permission </span></li><li class="alt"><span> * had not already been given. Result is returned via pi. </span></li><li class=""><span> */ </span></li><li class="alt"><span> public void requestAccessoryPermission( android.hardware.usb.UsbAccessory accessory, java.lang.String packageName, android.app.PendingIntent pi ) throws android.os.RemoteException; </span></li><li class=""><span> /* Grants permission for the given UID to access the device */ </span></li><li class="alt"><span> public void grantDevicePermission( android.hardware.usb.UsbDevice device, int uid ) throws android.os.RemoteException; </span></li><li class=""><span> /* Grants permission for the given UID to access the accessory */ </span></li><li class="alt"><span> public void grantAccessoryPermission( android.hardware.usb.UsbAccessory accessory, int uid ) throws android.os.RemoteException; </span></li><li class=""><span> /* Returns true if the USB manager has default preferences or permissions for the package */ </span></li><li class="alt"><span> public boolean hasDefaults( java.lang.String packageName ) throws android.os.RemoteException; </span></li><li class=""><span> /* Clears default preferences and permissions for the package */ </span></li><li class="alt"><span> public void clearDefaults( java.lang.String packageName ) throws android.os.RemoteException; </span></li><li class=""><span> /* Sets the current USB function. */ </span></li><li class="alt"><span> public void setCurrentFunction( java.lang.String function, boolean makeDefault ) throws android.os.RemoteException; </span></li><li class=""><span> /* Sets the file path for USB mass storage backing file. */ </span></li><li class="alt"><span> public void setMassStorageBackingFile( java.lang.String path ) throws android.os.RemoteException; </span></li><li class=""><span>} </span></li>
这篇文章提到三种方法可以实现所需要的效果：
1，把您的app放到系统应用文件夹下：/system/app/...
2，在AndroidManifest.xml中添加上系统签名；
以上两种方法作为第三方应用的开发者来说都有点难度，第三种方法的实现除了安装apk应用之后第一次插上USB设备弹出对话框：
勾选上 “默认情况下用于该USB设备”，点击确定即可。每次开机后默认打开该app应用。
使用本文提到的第三种方法确实可以避免每次打开app应用都弹出对话框的请求；
3，步骤一：在你的项目中加入包 android.hardware.usb，添加接口文件IUsbManager.java：
package android.hardware.usb;
public interface IUsbManager extends android.os.IInterface
{
/** Local-side IPC implementation stub class. */
public static abstract class Stub extends android.os.Binder implements android.hardware.usb.IUsbManager
{
/** Construct the stub at attach it to the interface. */
public Stub()
{
throw new RuntimeException( "Stub!" );
}
/**
* Cast an IBinder object into an android.hardware.usb.IUsbManager interface,
* generating a proxy if needed.
*/
public static android.hardware.usb.IUsbManager asInterface( android.os.IBinder obj )
{
throw new RuntimeException( "Stub!" );
}
public android.os.IBinder asBinder()
{
throw new RuntimeException( "Stub!" );
}
public boolean onTransact( int code, android.os.Parcel data, android.os.Parcel reply, int flags ) throws android.os.RemoteException
{
throw new RuntimeException( "Stub!" );
}
static final int TRANSACTION_getDeviceList = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
static final int TRANSACTION_openDevice = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);
static final int TRANSACTION_getCurrentAccessory = (android.os.IBinder.FIRST_CALL_TRANSACTION + 2);
static final int TRANSACTION_openAccessory = (android.os.IBinder.FIRST_CALL_TRANSACTION + 3);
static final int TRANSACTION_setDevicePackage = (android.os.IBinder.FIRST_CALL_TRANSACTION + 4);
static final int TRANSACTION_setAccessoryPackage = (android.os.IBinder.FIRST_CALL_TRANSACTION + 5);
static final int TRANSACTION_hasDevicePermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 6);
static final int TRANSACTION_hasAccessoryPermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 7);
static final int TRANSACTION_requestDevicePermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 8);
static final int TRANSACTION_requestAccessoryPermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 9);
static final int TRANSACTION_grantDevicePermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 10);
static final int TRANSACTION_grantAccessoryPermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 11);
static final int TRANSACTION_hasDefaults = (android.os.IBinder.FIRST_CALL_TRANSACTION + 12);
static final int TRANSACTION_clearDefaults = (android.os.IBinder.FIRST_CALL_TRANSACTION + 13);
static final int TRANSACTION_setCurrentFunction = (android.os.IBinder.FIRST_CALL_TRANSACTION + 14);
static final int TRANSACTION_setMassStorageBackingFile = (android.os.IBinder.FIRST_CALL_TRANSACTION + 15);
}
/* Returns a list of all currently attached USB devices */
public void getDeviceList( android.os.Bundle devices ) throws android.os.RemoteException;
/* Returns a file descriptor for communicating with the USB device.
* The native fd can be passed to usb_device_new() in libusbhost.
*/
public android.os.ParcelFileDescriptor openDevice( java.lang.String deviceName ) throws android.os.RemoteException;
/* Returns the currently attached USB accessory */
public android.hardware.usb.UsbAccessory getCurrentAccessory() throws android.os.RemoteException;
/* Returns a file descriptor for communicating with the USB accessory.
* This file descriptor can be used with standard Java file operations.
*/
public android.os.ParcelFileDescriptor openAccessory( android.hardware.usb.UsbAccessory accessory ) throws android.os.RemoteException;
/* Sets the default package for a USB device
* (or clears it if the package name is null)
*/
public void setDevicePackage( android.hardware.usb.UsbDevice device, java.lang.String packageName ) throws android.os.RemoteException;
/* Sets the default package for a USB accessory
* (or clears it if the package name is null)
*/
public void setAccessoryPackage( android.hardware.usb.UsbAccessory accessory, java.lang.String packageName ) throws android.os.RemoteException;
/* Returns true if the caller has permission to access the device. */
public boolean hasDevicePermission(android.hardware.usb.UsbDevice device) throws android.os.RemoteException;
/* Returns true if the caller has permission to access the accessory. */
public boolean hasAccessoryPermission( android.hardware.usb.UsbAccessory accessory ) throws android.os.RemoteException;
/* Requests permission for the given package to access the device.
* Will display a system dialog to query the user if permission
* had not already been given.
*/
public void requestDevicePermission( android.hardware.usb.UsbDevice device, java.lang.String packageName, android.app.PendingIntent pi ) throws android.os.RemoteException;
/* Requests permission for the given package to access the accessory.
* Will display a system dialog to query the user if permission
* had not already been given. Result is returned via pi.
*/
public void requestAccessoryPermission( android.hardware.usb.UsbAccessory accessory, java.lang.String packageName, android.app.PendingIntent pi ) throws android.os.RemoteException;
/* Grants permission for the given UID to access the device */
public void grantDevicePermission( android.hardware.usb.UsbDevice device, int uid ) throws android.os.RemoteException;
/* Grants permission for the given UID to access the accessory */
public void grantAccessoryPermission( android.hardware.usb.UsbAccessory accessory, int uid ) throws android.os.RemoteException;
/* Returns true if the USB manager has default preferences or permissions for the package */
public boolean hasDefaults( java.lang.String packageName ) throws android.os.RemoteException;
/* Clears default preferences and permissions for the package */
public void clearDefaults( java.lang.String packageName ) throws android.os.RemoteException;
/* Sets the current USB function. */
public void setCurrentFunction( java.lang.String function, boolean makeDefault ) throws android.os.RemoteException;
/* Sets the file path for USB mass storage backing file. */
public void setMassStorageBackingFile( java.lang.String path ) throws android.os.RemoteException;
}
步骤二：再创建android.os包，添加ServiceManager.java类：
package android.os;
import java.util.Map;
public final class ServiceManager
{
public static IBinder getService( String name )
{
throw new RuntimeException( "Stub!" );
}
/**
* Place a new @a service called @a name into the service
* manager.
*
* @param name the name of the new service
* @param service the service object
*/
public static void addService( String name, IBinder service )
{
throw new RuntimeException( "Stub!" );
}
/**
* Retrieve an existing service called @a name from the
* service manager. Non-blocking.
*/
public static IBinder checkService( String name )
{
throw new RuntimeException( "Stub!" );
}
public static String[] listServices() throws RemoteException
{
throw new RuntimeException( "Stub!" );
}
/**
* This is only intended to be called when the process is first being brought
* up and bound by the activity manager. There is only one thread in the process
* at that time, so no locking is done.
*
* @param cache the cache of service references
* @hide
*/
public static void initServiceCache( Map<String, IBinder> cache )
{
throw new RuntimeException( "Stub!" );
}
}
步骤三：在AndroidManifest.xml中加入权限
<uses-permission android:name="android.permission.MANAGE_USB" />
这时系统会提示错误：Permission is only granted to system apps.
解决：Window -> Preferences -> Android -> Lint Error Checking.找到ID=ProtectedPermission这项设置它的”serverity“比"error"低即可。
到这里执行就OK了。
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