MediaPlayer, ProgressBar

Question

Is this the correct way to update a ProgressBar when playing Media? I figured there would be a callback in MediaPlayer, but I couldn\'t find it.

mediaPla         


        

Answer 1

The most efficient way is to use JRaymond's answer and EventBus

private class MediaObserver implements Runnable {
    private AtomicBoolean stop = new AtomicBoolean(false);
    public void stop() {
        stop.set(true);
    }

    @Override public void run() {
        while (!stop.get()) {
            try {
              if (player.isPlaying())
                 sendMsgToUI(player.getCurrentPosition(),
                             player.getDuration());
            } catch (Exception e){e.printStackTrace();}
            try { 
              Thread.sleep(100);
            } catch (InterruptedException e) { e.printStackTrace(); }
        }
    }
}

private MediaObserver observer = null;

public void runMedia() {
    observer = new MediaObserver();
    new Thread(observer).start();
}

//handles all the background threads things for you
private void sendMsgToUI(int position) {
    ChangingEvent event = new ChangingEvent(position);
    EventBus.getDefault().post(event);
}

ChangingEvent class would look something like that:

public class ChangingEvent {
  private int position;

  public ChangingEvent(int position) {
      this.position= position;
  }

  public int getPosition() {
      return position;
  }
}

and in your Activity or Fragment all you have to do is

class YouClass extends Activity {
  private EventBus eventBus = EventBus.getDefault();
}

@Override protected void onCreate(Bundle savedInstanceState) {
    //your code
    eventBus.register(this);
}
//eventbus that updates UI
public void onEventMainThread(ChangingEvent event) {
    //seekbar or any other ui element
    seekBar.setProgress(event.getPosition());
}