android音乐播放器(3)

播放界面自定义外观，Tween Animation实现播放按钮的显示隐藏，支持手势操作

界面效果：

 /**
  * 切换按钮的显示状态(动画)
 */
 private void toControlBtn(){
  int anim=0;
  int visible=0;
  if(mNextButton.isShown()){
   visible=View.GONE;
   anim=R.anim.prev_out;
  }else{
   visible=View.VISIBLE;
   anim=R.anim.prev_in;
  }
  //设置是否可见
  mPlayButton.setVisibility(visible);
  mRandomButton.setVisibility(visible);
  mStopButton.setVisibility(visible);
  mNextButton.setVisibility(visible);
  mPrevButton.setVisibility(visible);
  mRepeatButton.setVisibility(visible);
  //设置显示方式。动画效果
  Animation animation=AnimationUtils.loadAnimation(this, anim);
  mPlayButton.setAnimation(animation);
  mRandomButton.setAnimation(animation);
  mStopButton.setAnimation(animation);
  mNextButton.setAnimation(animation);
  mPrevButton.setAnimation(animation);
  mRepeatButton.setAnimation(animation);
 }




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 private void loadGestureLib(){
  //从raw文件中初始化手势
  mLibrary = GestureLibraries.fromRawResource(this, R.raw.gestures);
  //加载手势
  mLibrary.load();
 }

//从手势库中识别手势
  GestureOverlayView overlayView=(GestureOverlayView) findViewById(R.id.gestureView1);
  overlayView.addOnGesturePerformedListener(new OnGesturePerformedListener() {

   @Override
   public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
    //识别手势，放入手势库中
    ArrayList<Prediction> recognize=mLibrary.recognize(gesture);
    //得到与手势库中最相近的手势
    Prediction prediction=recognize.get(0);
    //相似度大于40%
    if(prediction.score>=4){
     //判断手势名称是否匹配
     if("next".equals(prediction.name)){
      mMyBinder.next();
     }else if ("prev".equals(prediction.name)){
      mMyBinder.prev();
     }else if ("pause".equals(prediction.name)){
      mMyBinder.pause();
     }else if ("stop".equals(prediction.name)){
      mMyBinder.stop();
     }
    }
   }
  });