import ‘dart:async‘; import ‘dart:convert‘; import ‘package:flutter/material.dart‘; import ‘package:http/http.dart‘ as http; Future<Post> fetchPost() async { final response = await http.get(‘https://jsonplaceholder.typicode.com/posts/1‘); final responseJson = json.decode(response.body); return new Post.fromJson(responseJson); } class Post { final int userId; final int id; final String title; final String body; Post({this.userId, this.id, this.title, this.body}); factory Post.fromJson(Map<String, dynamic> json) { return new Post( userId: json[‘userId‘], id: json[‘id‘], title: json[‘title‘], body: json[‘body‘], ); } } void main() => runApp(new MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return new MaterialApp( title: ‘Fetch Data Example‘, theme: new ThemeData( primarySwatch: Colors.blue, ), home: new Scaffold( appBar: new AppBar( title: new Text(‘Fetch Data Example‘), ), body: new Center( child: new FutureBuilder<Post>( future: fetchPost(), builder: (context, snapshot) { if (snapshot.hasData) { return new Text(snapshot.data.title); } else if (snapshot.hasError) { return new Text("${snapshot.error}"); } // By default, show a loading spinner return new CircularProgressIndicator(); }, ), ), ), ); } }

flutter http get请求