-
Instalar json-server:
npm install -g json-server -
Crear una aplicación nueva con flutter:
flutter create --org ups.edu.ec flutter_rest
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Cliente REST',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Cliente REST'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: FutureBuilder<Persona>(
future: leerPersona(),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Text(snapshot.data.nombre);
} else if (snapshot.hasError) {
return Text("${snapshot.error}");
}
return CircularProgressIndicator();
},
)),
);
}
Future<Persona> leerPersona() async {
final response = await http.get('http://your_ip:3000/persona');
if (response.statusCode == 200) {
return Persona.fromJson(json.decode(response.body));
} else {
throw Exception('Falló al recuperar la persona');
}
}
}
class Persona {
int id;
String nombre;
Persona({int id, String nombre}) {
this.id = id;
this.nombre = nombre;
}
factory Persona.fromJson(Map<String, dynamic> json) {
return Persona(id: json['id'], nombre: json['nombre']);
}
}Para iniciar el servidor ejecutar: json-server --host your_ip --watch db.json
{
"persona": {"id": 1, "nombre": "Frank Montalvo Ochoa"}
}
