如何在自定义listview onbuttonclick中只更新一行的值？

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

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

    @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(final int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
            holder = new ViewHolder();
            holder.textView = convertView.findViewById(R.id.text_view);
            holder.button = convertView.findViewById(R.id.button);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        final Item item = itemList.get(position);
        holder.textView.setText(item.getValue());

        holder.button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 更新对应行的值
                item.setValue("New Value");

                // 通知ListView刷新数据
                notifyDataSetChanged();
            }
        });

        return convertView;
    }

    private static class ViewHolder {
        TextView textView;
        Button button;
    }
}