public AudioWife addOnCompletionListener(OnCompletionListener listener){
  mCompletionListeners.add(0,listener);
  return this;
}

public AudioWife addOnCompletionListener ( OnCompletionListener listener ) { mCompletionListeners . add ( 0 , listener ) ; return this ; }
* add custom playback completion listener . adding multiple listeners will queue up all the listeners and fire them on media playback completes .
