title: Recognize Stop AudioTrack
body: <p>How to detect if an AudioTrack has finished playing? it's not simple!!!
  I need to touch immediately after the other (enqueue) This code is not working ...
  When press 2 times, the 1st not end, and two sound plays same time... </p>
  
  <pre><code>private void getNextAudio() {
      try{            
  
          byte[] buffer = playlist.poll();
          if (buffer != null) {
  
              AudioTrack myatrack = getAudioTrack(buffer);                
              myatrack.setPlaybackPositionUpdateListener( new OnPlaybackPositionUpdateListener() {            
  
                  public void onPeriodicNotification(AudioTrack track) {
  
                  }
  
                  public void onMarkerReached(AudioTrack track) {             
                      Log.d(TAG, "onMarker - estado: " + track.getPlayState());
  
                      if(track.getPlayState() == AudioTrack.PLAYSTATE_STOPPED){
  
                          track.flush();
                          track.stop();
                          track.release();
  
                          getNextAudio();
                      }                               
                  }
              });             
  
              if (myatrack != null) {
                  // toco o audio.
                  myatrack.play();
              }
          }else{
              Log.d(TAG,"Finish");
          }
      }catch(NoSuchElementException ex){
          Log.d(TAG,"No such element");           
      }
  }
  </code></pre>
  
  <p>Thanks again!
  Mateus</p>