Play and pause music applications other than default (ex. Pandora)
===

I am currently working on an app where I need to use TTS. The problem is that if the user is listening to music, you cant hear TTS. I have figured out that I can use AudioFocus to temporarily take focus, and then release it. Taking the focus pauses pandora (the application I'm currently trying to work with), but releasing it doesn't do anything. 

I know when going into a phone call, it is able to pause pandora and everything else, but i couldn't find anything in the source code controlling this.

Is there any other way to resume pandora or any other external music player? 

I use this to pause the music.

    if(am.isMusicActive()){
			int result = am.requestAudioFocus(this, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
			if(result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED){
			}
		}

And release it in the onDestroy

	am.abandonAudioFocus(this);

I have tried to resume it by the following sections:

	Intent i = new Intent("com.android.music.musicservicecommand");
	i.putExtra("command", "play");
	this.sendBroadcast(i);

and

    Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
    KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_UP,KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE);
    downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
    sendOrderedBroadcast(downIntent, null);


The first one plays plays the native music app (and it's obvious why, but I thought it was worth a shot). The second one does nothing. I've also used it to try to pause the music, but didn't work as well.

Thank you