How to pair a paired A2dp bluetooth device on Android 4.2 using reflection?
I need to connect a specific BT device with a simple push of a button.
Requirement - The user should not receive any notification dialogs, as in the case of using standard socket methods.
I used this solution in my project . The following code:
/**
* Return system service to work with A2DP
*
* @return bluetooth interface
*/
private static IBluetoothA2dp getIBluetoothA2dp() {
IBluetoothA2dp ibta = null;
try {
final Class serviceManager = Class.forName("android.os.ServiceManager");
final Method getService = serviceManager.getDeclaredMethod("getService", String.class);
final IBinder iBinder = (IBinder) getService.invoke(null, "bluetooth_a2dp");
final Class iBluetoothA2dp = Class.forName("android.bluetooth.IBluetoothA2dp");
final Class[] declaredClasses = iBluetoothA2dp.getDeclaredClasses();
final Class c = declaredClasses[0];
final Method asInterface = c.getDeclaredMethod("asInterface", IBinder.class);
asInterface.setAccessible(true);
ibta = (IBluetoothA2dp) asInterface.invoke(null, iBinder);
} catch (final Exception e) {
Log.e("Error " + e.getMessage());
}
return ibta;
}
It worked well until I ran the app on Android 4.2. Now I cannot get the IBluetoothA2dp interface because the getService () method does not return an IBinder with the key "bluetooth_a2dp" to me.
Can anyone help me?
Thanks in advance!
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Finally, it took 4.2. See here for details: http://code.google.com/p/a2dp-connect2/
It is very different from 4.1 and earlier.
The first call connects to the interface like this:
public static void getIBluetoothA2dp(Context context) {
Intent i = new Intent(IBluetoothA2dp.class.getName());
if (context.bindService(i, mConnection, Context.BIND_AUTO_CREATE)) {
} else {
// Log.e(TAG, "Could not bind to Bluetooth A2DP Service");
}
}
When the interface returns, it will fall back to the following:
public static ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
ibta2 = IBluetoothA2dp.Stub.asInterface(service);
}
@Override
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
}
};
ibta2 above is the IBluetoothA2dp interface.
In a related note, the IBluetooth interface has also changed. I use this to get the device alias name (one that the user can edit). This getRemoteAlias () function used to need a mac address. It now accepts a BluetoothDevice.
Keep in mind that using these hidden interfaces is risky as they can and change too often with newer versions of Android. Several times I was a little against it. You really need to stay on top.
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If anyone needs an answer to something related to autopilot, I can check my answer here. fooobar.com/questions/1995080 / ...
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