android屏幕监控上下左右滑动

简单写一下，view 或者 activity 实现 OnGestureListener 接口。

在 onFling方法中实现左右滑动：

 public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
             float distanceY) {
         float y1 = e1.getY(), y2 = e2.getY();
         if (y1 -y2 > 120) {
             if (mDirection != SOUTH) {
                 mNextDirection = NORTH;
             }
             Log.d(this.getClass().getName(), "To UP" + "(" + y1
                     + "," + y2 + ")");
             return (true);
         } else if (y1 - y2 < -120) {
             if (mDirection != NORTH) {
                 mNextDirection = SOUTH;
             }
             Log.d(this.getClass().getName(), "To Down" + "(" + y1
                     + "," + y2 + ")");
             return (true);
         }
         return false;
     }

在 onScroll 方法中实现上下滑动：

 public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
             float velocityY) {
         Log.d("Fling", "Fling Happened!");
         float x1 = e1.getX(), x2 = e2.getX();

         if (x1 -x2 > 120) {
             if (mDirection != EAST) {
                 mNextDirection = WEST;
             }
             Log.d(this.getClass().getName(), "To LEFT" + "(" + x1
                     + "," + x2 + ")");
             return (true);
         } else if (x1 - x2 < -120) {
             if (mDirection != WEST) {
                 mNextDirection = EAST;
             }
             Log.d(this.getClass().getName(), "To Right" + "(" + x1
                     + "," + x2 + ")");
             return (true);
         }

         return false;
     }