无法刷新从JSON获取数据的ListView，当单击其在Android中的适配器按钮时

public class CustomAdapter extends BaseAdapter {
    private Context context;
    private ArrayList<Item> itemList;

    public CustomAdapter(Context context, ArrayList<Item> itemList) {
        this.context = context;
        this.itemList = itemList;
    }

    @Override
    public int getCount() {
        return itemList.size();
    }

    @Override
    public Object getItem(int position) {
        return itemList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_item, parent, false);

            holder = new ViewHolder();
            holder.button = convertView.findViewById(R.id.button);
            // 其他视图组件的初始化

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        Item item = itemList.get(position);

        // 设置视图组件的值

        holder.button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 执行按钮点击事件的操作
                // 更新数据源
                // 调用notifyDataSetChanged()方法刷新ListView
            }
        });

        return convertView;
    }

    private static class ViewHolder {
        Button button;
        // 其他视图组件
    }
}