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 first time then there should be pause button visible but instead there is play and when I press that button then the music is paused correctly and state remains the same and after that its working properly. Also when I play next song, the old MediaController widget gets overlapped with the new one. And sometimes the progress/seek bar doesn't refresh while the music is playing. It just updates itself when something on the MediaController is pressed (Play/Pause, forward, etc).

I found these questions similar to mine but I don't think the answers they got will solve my problem.

This is how I initialize the controller:

private void setController()
{
    controller = new MusicController(this);

    controller.setPrevNextListeners(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            playNext();
          }
        }, new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            playPrev();
          }
        });

    controller.setMediaPlayer(this);
    controller.setAnchorView(findViewById(R.id.song_list));
    controller.setEnabled(true);
}

This is how I show controller:

public void playMusic()
{
        musicSrv.playSong(); //Play song in a service
        setController();
        controller.show(0);
        controller.requestFocus();
}

Alec Alec · Accepted Answer · 2014-09-15T21:36:50

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).

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);
}

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);
    }
};

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"));

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.

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

1 Answers