通过单击/触摸外部来删除片段：

Question

我有一些片段是使用代码从RelativeLayout 动态添加和删除的。其中一个片段是ListFragment，与其他具有关闭和保存按钮的片段相反，这个片段仅包含一个列表。

我的目标是通过在 Activity 中的任何位置单击该片段外部来关闭/删除该片段。

我找到了以下代码：

@Override
public boolean onTouchEvent(MotionEvent event) {
    // I only care if the event is an UP action
    if (event.getAction() == MotionEvent.ACTION_UP) {
        // create a rect for storing the window rect
        Rect r = new Rect(0, 0, 0, 0);
        // retrieve the windows rect
        this.getWindow().getDecorView().getHitRect(r);
        // check if the event position is inside the window rect
        boolean intersects = r.contains((int) event.getX(), (int) event.getY());
        // if the event is not inside then we can close the activity
        if (!intersects) {
            // close the activity
            this.finish();
            // notify that we consumed this event
            return true;
        }
    }
    // let the system handle the event
    return super.onTouchEvent(event);
}

点击外部时关闭非全屏活动，但我似乎不明白如何找到我的片段矩形。

有人能帮我指出正确的方向吗？任何帮助将不胜感激。

谢谢。

Answer 1

好吧，我终于想通了：

@Override
public boolean onTouchEvent ( MotionEvent event ) 
{
    // I only care if the event is an UP action
    if ( event.getAction () == MotionEvent.ACTION_UP ) 
    {
        //and only is the ListFragment shown.
        if (isListFragmentShown)
        {   
            // create a rect for storing the fragment window rect
            Rect r = new Rect ( 0, 0, 0, 0 );
            // retrieve the fragment's windows rect
            currentFragment.getView().getHitRect(r);
            // check if the event position is inside the window rect
            boolean intersects = r.contains ( (int) event.getX (), (int) event.getY () );
            // if the event is not inside then we can close the fragment
            if ( !intersects ) {
                Log.d(TAG, "pressed outside the listFragment");
                FragmentTransaction fragmentTransaction;
                fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.remove(currentFragment).commit();
                // notify that we consumed this event
                return true;
            }
        }
    }
    //let the system handle the event
    return super.onTouchEvent ( event );
}

Answer 2

您可以将点击监听器添加到您的容器RelativeLayout。如果片段已启动，则激活您的 RelativeLayout 的侦听器，以便侦听器仅在片段存在时起作用。