Android的ListView的onTouchEvent不给ACTION_DOWN [英] Android ListView onTouchEvent doesn't give ACTION_DOWN

问题描述

为了让列表重新排序功能我转身<一个href=\"http://ericharlow.blogspot.de/2010/10/experience-android-drag-and-drop-list.html?showComment=1332171356419#c7022544393803712338\"相对=nofollow>这个实现。

In order to have list reordering functionality I turned to this implementation.

我的问题是，当我尝试在我的ListView拖动一个项目，我没有得到ACTION_DOWN事件。相反，对于单个涂抹上下运动，我得到2 ACTION_MOVE事件（行动= 0x00000002）和一个ACTION_UP事件（行动= 00000001）的顺序。

My problem is that when I try to drag an item in my ListView, I don't get the ACTION_DOWN event. Instead, for a single smear down motion I get 2 ACTION_MOVE events (action=0x00000002) and a single ACTION_UP event (action=0x00000001) in this order.

我看过类似的问题，但好像每个人都有相反的问题，只得到ACTION_DOWN事件。
谁能想到为什么会这样呢？

I've looked at similar questions but it seems like everyone has the opposite problem, getting only ACTION_DOWN events. Can anyone think of why this is happening?

谢谢，
约尔

推荐答案

原来我需要添加这一小块code的：

It turns out I needed to add this small piece of code:

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    return super.onInterceptTouchEvent(ev);
}

现在，我得到了OnTouchEvent功能ACTION_DOWN事件，这一切工作正常。

Now I get the ACTION_DOWN events in the OnTouchEvent function and it all works fine.

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