java - Android ExpandedListView 希望 SwipeToDismiss 仅适用于群组

Question

我从这里得到了似乎是实际版本的 SwipeToDismiss 实现:google code / Roman Nurik .

而且效果很好。但是，我在 ExpandedListView 上使用它，我只希望 Groups 可以忽略。

在 TouchListener 事件中，似乎有两个地方我可以干预并且不允许解散:

mListView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
    // return false if not on a group ???????
    return mSwipeDismissTouchListener.onTouch(view, motionEvent);
 ..

或在 SwipeDismissListViewTouchListener 事件中:

mSwipeDismissTouchListener = new SwipeDismissListViewTouchListener(
        mListView,
        new SwipeDismissListViewTouchListener.DismissCallbacks() {
            public boolean canDismiss(int position) {
                // return false if not on a group ???????
            }
            public void onDismiss(ListView listView, int[] reverseSortedPositions) {
            }
        }
);

但我不知道如何判断点击/触摸事件是发生在组还是 child 身上。

有人有什么想法吗？

TIA。

Answer 1

您需要采用您的适配器类并使用 ViewHolder Pattern但有一些修改:公开，公开你的领域，像这样

public static class ViewHolderGroup {
    TextView tvName;
    ImageView ivLogo;
    public boolean isGroup;
}

并将一些变量设置为Tag , 这将定义 wheater

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    ViewHolderGroup holder;
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) this.context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.row_group_operator, null);
        holder = new ViewHolderGroup();
        holder.tvName = (TextView) convertView.findViewById(R.id.layout_row_group_operator_tv_Name);
        holder.ivLogo = (ImageView) convertView.findViewById(R.id.layout_row_group_operator_iv_Logo);
        holder.ivLogo.setVisibility(View.GONE);
        holder.isGroup = true;  // Here we setting field to know this is group
        convertView.setTag(holder);

    } else {
        holder = (ViewHolderGroup) convertView.getTag();
    }
   ....
 }

然后在你之前描述的代码中得到这个标签，像这样

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    fa = this;
    View rootView = inflater.inflate(R.layout.fg_elist, container, false);

    final ExpandableListView elMain = (ExpandableListView) rootView.findViewById(R.id.layout_fg_elist_elv_Main);
    RouteExpandableListAdapter routesAdapter = new RouteExpandableListAdapter(Rendis.mContext, Rendis.dates, Rendis.routes);
    elMain.setAdapter(routesAdapter);
    registerForContextMenu(elMain);
    elMain.setOnChildClickListener(this);

    elMain.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent motionEvent) {

            Rect rect = new Rect();
            int childCount = elMain.getChildCount();
            int[] listViewCoords = new int[2];
            elMain.getLocationOnScreen(listViewCoords);
            int x = (int) motionEvent.getRawX() - listViewCoords[0];
            int y = (int) motionEvent.getRawY() - listViewCoords[1];
            View child;
            for (int i = 0; i < childCount; i++) {
                child = elMain.getChildAt(i);
                child.getHitRect(rect);

                if (rect.contains(x, y)) {
                    RouteExpandableListAdapter.ViewHolderGroup holder  = (RouteExpandableListAdapter.ViewHolderGroup) child.getTag();
                    if(holder.isGroup){
                        // DO WHAT YOU WANT TO DO
                    }
                    break;
                }
            }

            return false;
        }
    });
    return rootView;
}

希望对你有帮助