在ExpandableListView组内点击按钮时，如何更改分片？

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

        // 获取适配器
        ExpandableListAdapter adapter = parent.getExpandableListAdapter();

        // 获取点击子项对应的分片数据
        ShardData shardData = adapter.getChild(groupPosition, clickedChildPosition);

        // 修改分片数据
        shardData.setContent("New content");

        // 通知适配器数据发生改变
        adapter.notifyDataSetChanged();

        return true;
    }
});