Android屏幕監控上下左右滑動

簡單寫一下，Android 下 view 或者 activity 實現 OnGestureListener 接口。

在 onFling方法中實現左右滑動：

1. public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
2. float distanceY) {
3. float y1 = e1.getY(), y2 = e2.getY();
4. if (y1 -y2 > 120) {
5. if (mDirection != SOUTH) {
6. mNextDirection = NORTH;
7. }
8. Log.d(this.getClass().getName(), "To UP" + "(" + y1
9. + "," + y2 + ")");
10. return (true);
11. } else if (y1 - y2 < -120) {
12. if (mDirection != NORTH) {
13. mNextDirection = SOUTH;
14. }
15. Log.d(this.getClass().getName(), "To Down" + "(" + y1
16. + "," + y2 + ")");
17. return (true);
18. }
19. return false;
20. }

1. public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
2. float velocityY) {
3. Log.d("Fling", "Fling Happened!");
4. float x1 = e1.getX(), x2 = e2.getX();
6. if (x1 -x2 > 120) {
7. if (mDirection != EAST) {
8. mNextDirection = WEST;
9. }
10. Log.d(this.getClass().getName(), "To LEFT" + "(" + x1
11. + "," + x2 + ")");
12. return (true);
13. } else if (x1 - x2 < -120) {
14. if (mDirection != WEST) {
15. mNextDirection = EAST;
16. }
17. Log.d(this.getClass().getName(), "To Right" + "(" + x1
18. + "," + x2 + ")");
19. return (true);
20. }
22. return false;
23. }