在onChildClickListener，ExpandableListView上更改groupName

expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
        // 获取点击的子项的位置信息
        // int groupPosition = ExpandableListView.getPackedPositionGroup(id);
        // int childPosition = ExpandableListView.getPackedPositionChild(id);

        // 获取对应的组名
        ExpandableListAdapter adapter = parent.getExpandableListAdapter();
        String groupName = (String) adapter.getGroup(groupPosition);

        // 修改组名
        String newGroupName = groupName.replace("原组名", "新组名");

        // 更新组名
        // adapter.updateGroup(groupPosition, newGroupName);
        // adapter.notifyDataSetChanged();

        return false;
    }
});