Created
December 14, 2021 16:41
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import 'dart:async'; | |
import 'dart:convert'; | |
import 'package:flutter/material.dart'; | |
import 'package:http/http.dart' as http; | |
Future<Album> fetchAlbum() async { | |
final response = await http | |
.get(Uri.parse('https://jsonplaceholder.typicode.com/albums/1')); | |
if (response.statusCode == 200) { | |
// If the server did return a 200 OK response, | |
// then parse the JSON. | |
return Album.fromJson(jsonDecode(response.body)); | |
} else { | |
// If the server did not return a 200 OK response, | |
// then throw an exception. | |
throw Exception('Failed to load album'); | |
} | |
} | |
class Album { | |
final int userId; | |
final int id; | |
final String title; | |
Album({ | |
required this.userId, | |
required this.id, | |
required this.title, | |
}); | |
factory Album.fromJson(dynamic json) { | |
return Album( | |
userId: json['userId'], | |
id: json['id'], | |
title: json['title'], | |
); | |
} | |
} | |
void main() => runApp(const MyApp()); | |
class MyApp extends StatefulWidget { | |
const MyApp({Key? key}) : super(key: key); | |
@override | |
_MyAppState createState() => _MyAppState(); | |
} | |
class _MyAppState extends State<MyApp> { | |
late Future<Album> futureAlbum; | |
@override | |
void initState() { | |
super.initState(); | |
futureAlbum = fetchAlbum(); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
title: 'Fetch Data Example', | |
theme: ThemeData( | |
primarySwatch: Colors.blue, | |
), | |
home: Scaffold( | |
appBar: AppBar( | |
title: const Text('Fetch Data Example'), | |
), | |
body: Center( | |
child: FutureBuilder<Album>( | |
future: futureAlbum, | |
builder: (context, snapshot) { | |
if (snapshot.hasData) { | |
return Text(snapshot.data!.title); | |
} else if (snapshot.hasError) { | |
return Text('${snapshot.error}'); | |
} | |
// By default, show a loading spinner. | |
return const CircularProgressIndicator(); | |
}, | |
), | |
), | |
), | |
); | |
} | |
} |
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