code: public AudioWife setPlayView(View play) {
  
  		if (play == null) {
  			throw new NullPointerException("PlayView cannot be null");
  		}
  
  		if (mHasDefaultUi) {
  			Log.w(TAG, "Already using default UI. Setting play view will have no effect");
  			return this;
  		}
  
  		mPlayButton = play;
  
  		initOnPlayClick();
  		return this;
  	}
docs: *
  Sets the audio play functionality on click event of this view. You can set {@link android.widget.Button} or
  an {@link android.widget.ImageView} as audio play control
  
  @see nl.changer.audiowife.AudioWife#addOnPauseClickListener(android.view.View.OnClickListener)
  **