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我正在使用ExpandableListActivity我正在使用

SimpleExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int groupLayout, String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout, String[] childFrom, int[] childTo);

为我的活动。在这里，我创建了上下文菜单。使用上下文菜单我正在从数据库中删除值ArrayList以及Child Group. 我遇到的问题是我想ChildView在删除值后立即更新我的可扩展列表活动DataBase，ArrayList. 我尝试使用notifyDataSetChanged(). 它不起作用，因为我没有从 ExpandableListAdapter 本身删除值。我也尝试在删除值后再次调用适配器，但它提供了两个列表视图。

// here on select ContextMenu
@Override
    public boolean onContextItemSelected(MenuItem item) {

        ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item
                .getMenuInfo();
// Getting positions of Group and child from Expandable ListView
        int groupPos = 0, childPos = 0;
        int type = ExpandableListView
                .getPackedPositionType(info.packedPosition);
        if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
            groupPos = ExpandableListView
                    .getPackedPositionGroup(info.packedPosition);
            childPos = ExpandableListView
                    .getPackedPositionChild(info.packedPosition);
        }

        db.openConnection(this);

        View v = info.targetView;
        TextView tv = (TextView) v.findViewById(R.id.grp_child);
        String string = (String) tv.getText();
// Here I delete the value from DataBase onClik of Context Menu.
        if (item.getItemId() == 0) {
            final String where = "title=?";
            final String[] args = new String[] { string };
            database.delete(tableData, where, args);
        }
// Here I delete the value from ArrayList onClik of Context Menu.
//result1 is ArrayList<ArrayList<HashMap<String,String>>>();
        result1.get(groupPos).get(childPos);
        result1.remove(result1.get(groupPos).get(childPos));
        Log.e("Search", "is" + result1.get(groupPos).get(childPos));

        /*expListAdapter.notifyDataSetChanged();*/
        db.closeConnection();
        return super.onContextItemSelected(item);
// when i delete form both arraylist and database i want to update //ListView immidiately.
    }

任何帮助都会被告知。

提前致谢..

马哈维尔

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0 回答 0