如何检测MotionEvent.ACTION_MOVE何时完成 [英] how to detect when MotionEvent.ACTION_MOVE is finished

问题描述

当用户停止在特定视图中移动时，我需要在我的应用程序中进行检测。我在我的应用程序中创建类似于marque文本的东西，当用户触摸视图并在其中移动时，可以进行交互。我需要在用户抬起手指后开始滚动视图。正如我注意到，如果我将手指移过视图几秒钟，当我抬起手指时，不会调用 MotionEvent.ACTION_UP 。我捕获的最后一个事件是 ACTION_MOVE 。那么我怎样才能检测用户在几秒钟内移动视线后何时抬起手指？是否有某种功能可以检测到它？

I need to detect in my application when user stop moving across a specific view. I'm creating something similar to marque text in my application which can interact while user is touching the view and moving across it. And I need to start scrolling the view after user lifts his finger. As I notices if I move my finger across the view a few seconds and when I lift my finger the MotionEvent.ACTION_UP is not called. The last event which I capture is ACTION_MOVE . So how can I detect when user lifts his finger after moving across the view a few seconds? Is there some kind of function which can detect that?

以下是我正在使用的代码：

Here is the code which I'm using :

txt.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, final MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Log.e("","event down : "+event.getAction());
                handler.removeCallbacks(runnable);
                break;
            case MotionEvent.ACTION_UP:
                Log.e("","event up : "+event.getAction());
                if(myTimer!=null){
                    myTimer.cancel();
                }
                break;
            case MotionEvent.ACTION_MOVE:
                Log.d("","move");
                // handler.removeCallbacks(runnable);
                checkX();
                break;
        }
        return true;
    }
});

提前致谢！

推荐答案

我认为该事件可能是在手势完成之前发送 ACTION_CANCEL 动作。或者，如果它在您正在检查的视图之外拖动，则可能是 ACTION_OUTSIDE 。

I think the event may be sending an ACTION_CANCEL action before the gesture is finished. Or, if it drags outside of the view you're checking, it could be ACTION_OUTSIDE.

最佳方式确认/调试这将是一个 Log.d（）语句，打印 MotionEvent.getActionMasked（）值，并检查 ACTION_MOVE 事件结束后正在调用的操作。

The best way to confirm/debug this would be to put a Log.d() statement in, print the MotionEvent.getActionMasked() value, and check to see what actions are being called after your ACTION_MOVE event ends.

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