android - ExpandableListActivity 中 ContextMenu 的问题

Question

在 ExpandableListActivity 中，我注册了一个 ContextMenu。我想要做的是存储按下 ContextMenu 的组的子列表项的数据。根据:

onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo)

v 是为其构建上下文菜单的 View 。所以这个 View 应该是我点击的列表项的 View ，但它不是，它指的是子列表中的第一个列表项。我相信它应该返回为其构建上下文菜单的列表项的 View ，但这里不是这种情况。这是我的代码:

public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        menu.setHeaderTitle("My Crumbs");

        TextView rowid = (TextView) v
                .findViewById(R.id.trackdetails_item_row_id);
        rowId = rowid.getText().toString();

        ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) menuInfo;
        int type = ExpandableListView
                .getPackedPositionType(info.packedPosition);

        // Only create a context menu for the child
        if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {

            TextView trackstats = (TextView) v
                    .findViewById(R.id.trackdetails_item_stats);
    menu.add(0, MENU_SHARE, 0, "Share on Facebook");
        }

    }

有人可以阐明这一点吗？

编辑:

ExpandableListAdapter 的代码:

public class MyExpandableListAdapter extends SimpleCursorTreeAdapter {

        public MyExpandableListAdapter(Cursor cursor, Context context,
                int groupLayout, int childLayout, String[] groupFrom,
                int[] groupTo, String[] childrenFrom, int[] childrenTo) {
            super(context, cursor, groupLayout, groupFrom, groupTo,
                    childLayout, childrenFrom, childrenTo);
            setViewBinder(viewBinder);
        }

        @Override
        protected Cursor getChildrenCursor(Cursor groupCursor) {
            // TODO Auto-generated method stub
            String crumbName = groupCursor.getString(mCrumbNameColumnIndex);
            return crumpareDBAdapter.getTrackList(mTracksProjection, crumbName);
        }

        @Override
        public SimpleCursorTreeAdapter.ViewBinder getViewBinder() {
            return viewBinder;
        }

    }

ViewBinder 的代码:

SimpleCursorTreeAdapter.ViewBinder viewBinder = new ViewBinder() {

        @Override
        public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
            // TODO Auto-generated method stub
         TextView textView = (TextView) view;
         textView.setText(cursor.getString(columnIndex));
            return true;
        }
    };

Answer 1

您也可以从 ContextMenuInfo 中获取子项的 ID，而不是依赖于 View 。查看documentation因为它应该有你想要的。