android - OnSwipeListener 和 ExpandableListView 单击无法识别

Question

我在识别可扩展 ListView 上的 onGroup 点击时遇到问题。我正在为我的组 View 使用自定义滑动监听器以实现滑动目的。现在我想要的只是在按下组的同时展开组，但似乎我找不到在组 View 上注册 OnTouch 和 onGroupClick 的正确方法。当我不滑动时，我会调用 false，以便可以识别其他手势(例如正常单击和长按)，但我的组没有响应单击，因此没有扩展。

现在我的 Swipe 监听器工作正常，但 OnGroupClick 未被调用且未展开。当我从 getGroupView() 方法中删除 OnSwipeListener 时，实际扩展正常工作。

我对滑动监听器的自定义:

public class OnSwipeListener implements View.OnTouchListener
{
    private final GestureDetector gestureDetector = new GestureDetector(new GestureListener());

    public boolean onTouch(final View v, final MotionEvent event)
    {
        return gestureDetector.onTouchEvent(event);
    }

    private final class GestureListener extends GestureDetector.SimpleOnGestureListener
    {

        private static final int SWIPE_THRESHOLD = 70;
        private static final int SWIPE_VELOCITY_THRESHOLD = 70;

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
        {
            boolean result = false;
            try
            {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.getX();
                if (Math.abs(diffX) > Math.abs(diffY))
                {
                    if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD)
                    {
                        if (diffX > 0)
                        {
                            result = onSwipeRight();
                        }
                        else
                        {
                            result = onSwipeLeft();
                        }
                    }
                }
                else
                {
                    if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD)
                    {
                        if (diffY > 0)
                        {
                            result = onSwipeBottom();
                        }
                        else
                        {
                            result = onSwipeTop();
                        }
                    }
                }
            }
            catch (Exception exception)
            {
                exception.printStackTrace();
            }
            return result;
        }
    }

    public boolean onSwipeRight()
    {
        return false;
    }

    public boolean onSwipeLeft()
    {
        return false;
    }

    public boolean onSwipeTop()
    {
        return false;
    }

    public boolean onSwipeBottom()
    {
        return false;
    }
}

我的可扩展 ListView 及其组点击监听器设置:

expandable_list_view = (ExpandableListView) findViewById(R.id.activity_profile_expandable_listview);
setGroupParents(); setChildData();
ExpandableListAdapter adapter = new ExpandableListAdapter(this, parentItems, childItems);
expandable_list_view.setAdapter(adapter);

expandable_list_view.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener()
{
    @Override
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id)
    {
        parent.smoothScrollToPosition(groupPosition);

        if (parent.isGroupExpanded(groupPosition))
        {
            parent.collapseGroup(groupPosition);
        } else {
            parent.expandGroup(groupPosition);
        }

        return false;
    }
});

最后，从我的自定义适配器中获取GroupView以获取可扩展 ListView :

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
{

if (convertView == null)
{
    convertView = inflater.inflate(R.layout.layout_activity_expandableitem, null);
}

final View converted_view = convertView;

final LinearLayout front_view = (LinearLayout) converted_view.findViewById(R.id.layout_activity_expandableitem_front_view); front_view.setTag(Position.CENTER);
final LinearLayout behind_view = (LinearLayout) converted_view.findViewById(R.id.layout_activity_expandableitem_behind_view);
final View confirmation_view = inflater.inflate(R.layout.slide_profile, null); confirmation_view.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
final View cancel_view = inflater.inflate(R.layout.slide_cancel, null); cancel_view.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));


//  Set onTouchListener
front_view.setOnClickListener(null);
front_view.setOnTouchListener(new OnSwipeListener()
{
    @Override
    public boolean onSwipeRight()
    {
        Position position = (Position) front_view.getTag();
        if (position == Position.CENTER)
        {
            behind_view.removeAllViews();
            behind_view.addView(confirmation_view);
            showConfirmation(front_view);

            front_view.setTag(Position.RIGHT);
        }
        else if (position == Position.LEFT)
        {
            //behind_view.removeAllViews();
            showCenter(front_view, Position.RIGHT);

            front_view.setTag(Position.CENTER);
        }

        return true;
    }

    @Override
    public boolean onSwipeLeft()
    {
        Position position = (Position) front_view.getTag();
        if (position == Position.CENTER)
        {
            behind_view.removeAllViews();
            behind_view.addView(cancel_view);
            showInfo(front_view);

            front_view.setTag(Position.LEFT);
        }
        else if (position == Position.RIGHT)
        {
            //behind_view.removeAllViews();
            showCenter(front_view, Position.LEFT);

            front_view.setTag(Position.CENTER);
        }

        return true;
    }
});

//  Return the view
return converted_view;

感谢您提供有关如何解决此问题的任何想法。

Answer 1

所以这是发生的事情:

1. 当您设置OnGroupClick时，它被设置为整个 listview(不是每行)的执行当您触摸 listView 时，listview 将“找出”哪一行被单击了
2. 当您设置 SwipeListener 时，您会将其附加到行。
3. 当两者都设置时，该行位于整个listview之前，并将处理(消耗)触摸事件，而该事件又不会到达 ListView (这就是为什么你让它们分开工作的原因) 。

您可以选择:

1. 子类ListView并实现onInterceptTouchEvent()。这样，您的 listview 将始终能够“看到”触摸事件并对其进行操作。 (请注意，您可能会遇到同时检测到滑动和点击的情况)。
2. 实现您自己的 ListView，其 OnTouch 将负责识别哪一行有交互、识别滑动手势(通过您的监听器)和点击事件，并决定优先使用哪个。