如何确定是否在 MotionEvent.ACTION_SCROLL 之外单击了屏幕？

Question

我无法访问屏幕上对象的点击事件。所以我想用触摸监听器捕捉屏幕上的点击事件。但是当它滚动时，它也被视为点击。我该如何克服这个问题？

 mMessagesList.setOnTouchListener(new View.OnTouchListener() {
        private static final int MAX_CLICK_DURATION = 200;
        private long startClickTime;

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN: {
                    startClickTime = Calendar.getInstance().getTimeInMillis();
                    break;
                }
                case MotionEvent.ACTION_UP: {
                    long clickDuration = Calendar.getInstance().getTimeInMillis() - startClickTime;
                    if (clickDuration < MAX_CLICK_DURATION) {
                        //click event has occurred
                        myAction();
                    }
                    break;
                }
                case MotionEvent.ACTION_MOVE:
                    return false;
                case MotionEvent.ACTION_SCROLL:

                    return false;
                case MotionEvent.AXIS_SCROLL:
                    return false;
                case MotionEvent.ACTION_BUTTON_PRESS:
                    return true;
            }
            return false;
        }
    });

Answer 1

我为此使用了 "GestureDetector.OnGestureListener"。因此 "upScroll" 在 "downScroll" 情况下不会触发。我只在它真正触及屏幕时才这样做。