Koneksi flutter ke web service

Kalau yang dimaksud akses API cek <a href='https://flutter.dev/docs/cookbook/networking/fetch-data'>dokumentasi flutter bagian fetch data</a>

contoh

<pre> import 'dart:async'; import 'dart:convert';

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

Future&lt;Post&gt; fetchPost() async { final response = await http.get('https://jsonplaceholder.typicode.com/posts/1');

if (response.statusCode == 200) { // If the call to the server was successful, parse the JSON. return Post.fromJson(json.decode(response.body)); } else { // If that call was not successful, throw an error. throw Exception('Failed to load post'); } }

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&lt;String, dynamic&gt; json) { return Post( userId: json['userId'], id: json['id'], title: json['title'], body: json['body'], ); } }

void main() =&gt; runApp(MyApp(post: fetchPost()));

class MyApp extends StatelessWidget { final Future&lt;Post&gt; post;

MyApp({Key key, this.post}) : super(key: key);

@override Widget build(BuildContext context) { return MaterialApp( title: 'Fetch Data Example', theme: ThemeData( primarySwatch: Colors.blue, ), home: Scaffold( appBar: AppBar( title: Text('Fetch Data Example'), ), body: Center( child: FutureBuilder&lt;Post&gt;( future: post, 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 CircularProgressIndicator();
        },
      ),
    ),
  ),
);

} } </pre>

Main ke sini aja lengkap <a href=' https://flutter.dev/docs/cookbook/networking/fetch-data '>Flutter</a>

bisa baca <a href='https://flutter.dev/docs/cookbook/networking/fetch-data'>dokumentasinya disini</a> sesuaikan dengan kebutuhan project Anda, menggunakan packages http method GET atau POST. ini contoh dari dokumentasi flutter:

<pre> import 'dart:async'; import 'dart:convert';

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

Future&lt;Album&gt; fetchAlbum() async { final response = await http.get('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(json.decode(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({this.userId, this.id, this.title});

factory Album.fromJson(Map&lt;String, dynamic&gt; json) { return Album( userId: json['userId'], id: json['id'], title: json['title'], ); } }

void main() =&gt; runApp(MyApp());

class MyApp extends StatefulWidget { MyApp({Key key}) : super(key: key);

@override _MyAppState createState() =&gt; _MyAppState(); }

class _MyAppState extends State&lt;MyApp&gt; { Future&lt;Album&gt; 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: Text('Fetch Data Example'), ), body: Center( child: FutureBuilder&lt;Album&gt;( 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 CircularProgressIndicator();
        },
      ),
    ),
  ),
);

} } </pre>