Android MediaController Play/Pause button and Seekbar doesn't Refresh

Question

I am using MediaController.MediaPlayerControl in order to display a MediaController at the bottom of my Custom View but I can\'t get it to work properly. When I play music for f

Answer 1

I had exactly this problem. Don't know if you still need help, but I thought I'd post anyway. For posterity, are you following this tutorial?

First, the easy problem: you're getting multiple instances of your controls because of repeated calls to setController(). Change the first line of your function to:

if (controller == null) controller = new MusicController(this);

With regards to the play button malfunctioning, I believe it's because you're showing it before the music player has been prepared (disclaimer: I'm a newbie to Android myself, and the following are the things I've found to have worked).

1. Set up a broadcast from your music-playing service to notify your music-controlling activity when the musicplayer has been prepared. Append the following function in your music-playing service to broadcast intent:

   @Override
   public void onPrepared(MusicPlayer player) {
       // Do some other stuff...
   
       // Broadcast intent to activity to let it know the media player has been prepared
       Intent onPreparedIntent = new Intent("MEDIA_PLAYER_PREPARED");
       LocalBroadcastManager.getInstance(this).sendBroadcast(onPreparedIntent);
   }
   

2. Set up a broadcast receiver in your music-controlling activity to receive the intent broadcast by your service. Add the following class to your activity:

   // Broadcast receiver to determine when music player has been prepared
   private BroadcastReceiver onPrepareReceiver = new BroadcastReceiver() {
   @Override
   public void onReceive(Context c, Intent i) {
       // When music player has been prepared, show controller
       controller.show(0);
       }
   };
   

3. Register your receiver in your activity's onResume() method:

   // Set up receiver for media player onPrepared broadcast
   LocalBroadcastManager.getInstance(this).registerReceiver(onPrepareReceiver,
           new IntentFilter("MEDIA_PLAYER_PREPARED"));
   

4. Depending on the structure of your code, you'll have to do some general tidying up. In my code, I've only called setController() twice: from the onCreate() and onResume() methods in my activity. I also only call controller.show(0) from my broadcast receiver, and my onResume() method.