post json in flutter
import 'dart:async'; import 'dart:convert'; import 'package:flutter/material.dart'; import 'package:http/http.dart' as http; Future<Album> createAlbum(String title) async { final http.Response response = await http.post( 'https://jsonplaceholder.typicode.com/albums', headers: <String, String>{ 'Content-Type': 'application/json; charset=UTF-8', }, body: jsonEncode(<String, String>{ 'title': title, }), ); if (response.statusCode == 201) { return Album.fromJson(jsonDecode(response.body)); } else { throw Exception('Failed to create album.'); } } class Album { final int id; final String title; Album({this.id, this.title}); factory Album.fromJson(Map<String, dynamic> json) { return Album( id: json['id'], title: json['title'], ); } } void main() { runApp(MyApp()); } class MyApp extends StatefulWidget { MyApp({Key key}) : super(key: key); @override _MyAppState createState() { return _MyAppState(); } } class _MyAppState extends State<MyApp> { final TextEditingController _controller = TextEditingController(); Future<Album> _futureAlbum; @override Widget build(BuildContext context) { return MaterialApp( title: 'Create Data Example', theme: ThemeData( primarySwatch: Colors.blue, ), home: Scaffold( appBar: AppBar( title: Text('Create Data Example'), ), body: Container( alignment: Alignment.center, padding: const EdgeInsets.all(8.0), child: (_futureAlbum == null) ? Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ TextField( controller: _controller, decoration: InputDecoration(hintText: 'Enter Title'), ), ElevatedButton( child: Text('Create Data'), onPressed: () { setState(() { _futureAlbum = createAlbum(_controller.text); }); }, ), ], ) : FutureBuilder<Album>( future: _futureAlbum, builder: (context, snapshot) { if (snapshot.hasData) { return Text(snapshot.data.title); } else if (snapshot.hasError) { return Text("${snapshot.error}"); } return CircularProgressIndicator(); }, ), ), ), ); } }