[Flutter] Http

예제

pubspec.yaml

dependencies:
  http: 1.2.1

main.dart

import 'dart:convert';

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

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  MyAppState createState() => MyAppState();
}

class MyAppState extends State<MyApp> {
  List<Post> posts = [];

  @override
  void initState() {
    super.initState();
    fetchPosts();
  }

  Future<void> fetchPosts() async {
    final response =
        await http.get(Uri.parse('https://jsonplaceholder.typicode.com/posts'));
    if (response.statusCode == 200) {
      final List<dynamic> jsonData = jsonDecode(response.body);
      setState(() {
        posts = jsonData.map((e) => Post.fromJson(e)).toList();
      });
    } else {
      print('Failed to load posts: ${response.statusCode}');
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('HTTP Example'),
        ),
        body: ListView.builder(
          itemCount: posts.length,
          itemBuilder: (context, index) {
            final post = posts[index];
            return ListTile(
              title: Text(post.title),
              subtitle: Text(post.body),
            );
          },
        ),
      ),
    );
  }
}

class Post {
  final int id;
  final String title;
  final String body;

  Post({required this.id, required this.title, required this.body});

  factory Post.fromJson(Map<String, dynamic> json) {
    return Post(
      id: json['id'],
      title: json['title'],
      body: json['body'],
    );
  }
}

화면