如果您想与StreamBuilder定期使用它；
import 'dart:async';import 'package:flutter/material.dart';import 'package:http/http.dart' as http;import 'dart:convert';class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Server', debugShowCheckedModeBanner: false, theme: ThemeData( primarySwatch: Colors.pink, ), home: MyHomePage(title: 'Flutter Server App'), ); }}class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState();}class _MyHomePageState extends State<MyHomePage> { StreamController _streamController = StreamController(); Timer _timer; Future getData() async { var url = 'https://milk-white-reveille.000webhostapp.com/get.php'; http.Response response = await http.get(url); var data = jsonDepre(response.body); //Add your data to stream _streamController.add(data); } @override void initState() { getData(); //Check the server every 5 seconds _timer = Timer.periodic(Duration(seconds: 5), (timer) => getData()); super.initState(); } @override void dispose() { //cancel the timer if (_timer.isActive) _timer.cancel(); super.dispose(); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), centerTitle: true, ), body: StreamBuilder( stream: _streamController.stream, builder: (BuildContext context, AsyncSnapshot snapshot) { if (snapshot.hasData) return ListView( children: snapshot.data.map((document) { return ListTile( title: Text(document['title']), subtitle: Text(document['type']), ); }).toList(), ); return Text('Loading...'); }, ), ); }}
