如何在Flutter中发出多个http API请求？

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'HTTP Requests',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Future<List<dynamic>> fetchData() async {
    // 发出多个HTTP请求
    var response1 = await http.get(Uri.parse('https://api.example.com/endpoint1'));
    var response2 = await http.get(Uri.parse('https://api.example.com/endpoint2'));
    var response3 = await http.get(Uri.parse('https://api.example.com/endpoint3'));

    // 解析响应数据
    var data1 = jsonDecode(response1.body);
    var data2 = jsonDecode(response2.body);
    var data3 = jsonDecode(response3.body);

    // 返回数据列表
    return [data1, data2, data3];
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('HTTP Requests'),
      ),
      body: Center(
        child: ElevatedButton(
          child: Text('Fetch Data'),
          onPressed: () {
            fetchData().then((data) {
              // 处理响应数据
              // ...
            });
          },
        ),
      ),
    );
  }
}