Android:如何处理从右到左的滑动手势

   super.onCreate(savedInstanceState);

   setContentView(R.layout.activity_main);

   gestureDetector = new GestureDetectorCompat(this, new MyGestureListener());

   gestureDetector.onTouchEvent(event);

   return super.onTouchEvent(event);

   private static final int SWIPE_THRESHOLD = 100;

   private static final int SWIPE_VELOCITY_THRESHOLD = 100;

   @Override

   public boolean onFling(MotionEvent event1, MotionEvent event2, float velocityX, float velocityY) {

       float diffX = event2.getX() - event1.getX();

       float diffY = event2.getY() - event1.getY();

       if (Math.abs(diffX) > Math.abs(diffY)

               && Math.abs(diffX) > SWIPE_THRESHOLD

               && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {

           if (diffX > 0) {

               // 从左到右的滑动手势

           } else {

               // 从右到左的滑动手势

           }

           return true;

       }

       return false;

   }