my problem is that when I try to register a receiver to the music player
IntentFilter iF = new IntentFilter();
iF.addAction("com.android.music.metachanged");
iF.addAction("com.android.music.playstatechanged");
registerReceiver(mReceiver, iF);
this receiver is launched when any player runs. I want to get notified in the case of the default music player changes only. How can I get the unique action of the default player?