如何获取当前的刷卡方向行动ViewPager [英] How to get current swipe direction in action in ViewPager

问题描述

我想使用ViewPager用于显示不同的看法。

I am trying to use ViewPager for showing different views.

下面是code我使用的刷卡检查是否向左或向右

Below is code I am using to check whether swiping is left or right

    myPager.setOnTouchListener(new ViewPager.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            float x = event.getX();

            switch(event.getAction()){
            case MotionEvent.ACTION_DOWN:
                mStartDragX = x;
                break;
            case MotionEvent.ACTION_MOVE:
                if (event.getX() > mStartDragX ) {
                    Log.i(TAG,"SWIPING RIGHT");
                } else if (event.getX() < mStartDragX) {
                    Log.i(TAG,"SWIPING LEFT");
                }
                break;
            }
            return false;
        }
    });

所以，当我开始从右到左或右向左滑动，它显示我正确的日志信息。

So when I start to swipe from right to left or right to left its showing me correct log message.

但是，如果我开始从右到左，并在同一时间，如果再次启动刷卡由左到右，我怎么能确定当前是否刷卡在哪个方向？

But if I started to swipe from right to left and at the same time again if start to swipe from left to right, how can I identify whether currently swiping in which direction?

任何人都可以请帮助？

感谢

推荐答案

然后就somethink这样的..

Then do somethink like this..

case MotionEvent.ACTION_MOVE:
    if (event.getX() > mStartDragX) {
            Log.i(TAG, "SWIPING RIGHT");
            mStartDragX = event.getX();
        } else if (event.getX() < mStartDragX) {
            Log.i(TAG, "SWIPING LEFT");
            mStartDragX = event.getX();
        }

我在这里再次保存当前位置到老位置，所以只要刷卡回它会给正确的结果。

Here i am saving the current position again to old position so whenever the swiped back it will give the correct result..

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