有没有一种方法可以在错误快照后使用刷新指示器刷新fututre构建器

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  Future<String> fetchData() async {
    // 模拟异步获取数据
    await Future.delayed(Duration(seconds: 2));
    // 抛出一个异常
    throw Exception('Error occurred');
  }

  Future<void> _refreshData() async {
    // 刷新数据
    setState(() {
      // 重置future构建器
      _future = fetchData();
    });
  }

  Future<String> _future;

  @override
  void initState() {
    super.initState();
    // 初始化future构建器
    _future = fetchData();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Refresh Indicator Demo'),
      ),
      body: RefreshIndicator(
        onRefresh: _refreshData,
        child: FutureBuilder<String>(
          future: _future,
          builder: (context, snapshot) {
            if (snapshot.connectionState == ConnectionState.waiting) {
              return Center(
                child: CircularProgressIndicator(),
              );
            } else if (snapshot.hasError) {
              return Center(
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Text(
                      'Error occurred',
                      style: TextStyle(fontSize: 18),
                    ),
                    SizedBox(height: 10),
                    ElevatedButton(
                      onPressed: _refreshData,
                      child: Text('Retry'),
                    ),
                  ],
                ),
              );
            } else {
              return Center(
                child: Text(
                  'Data loaded successfully',
                  style: TextStyle(fontSize: 18),
                ),
              );
            }
          },
        ),
      ),
    );
  }
}