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;
    }