如何在streambuilder中实现pull_to_refresh

dependencies:
  flutter_pulltorefresh: ^1.2.4

import 'package:flutter_pulltorefresh/flutter_pulltorefresh.dart';

@override
Widget build(BuildContext context) {
  return PullToRefreshWidget(
    onRefresh: _handleRefresh,
    child: ListView.builder(
      itemCount: _data.length,
      itemBuilder: (context, index) {
        return ListTile(
          title: Text(_data[index]),
        );
      },
    ),
  );
}

Future<void> _handleRefresh() async {
  // 模拟网络请求
  await Future.delayed(Duration(seconds: 2));

  // 获取最新数据
  List<String> newData = await fetchData();

  // 更新列表
  setState(() {
    _data = newData;
  });
}