1 测试Http和HttpClient
导入包：在pubspec.yaml里面导入
http: ^0.12.2
main.dart里面导入
import 'package:http/http.dart' as http; import 'dart:convert'; import 'dart:io';
2 代码实现
import 'package:flutter/material.dart'; import 'package:url_launcher/url_launcher.dart'; import 'package:http/http.dart' as http; import 'dart:convert'; import 'dart:io'; void main() { runApp(MyApp1()); } class MyApp1 extends StatelessWidget { void getWeatherData() async { try { HttpClient httpClient = HttpClient(); HttpClientRequest request = await httpClient.getUrl(Uri.parse("http://pv.sohu.com/cityjson?ie=utf-8")); HttpClientResponse response = await request.close(); var result = await response.transform(utf8.decoder).join(); print(result); httpClient.close(); } catch (e) { print("get data fail $e"); } finally { } } @override Widget build(BuildContext context) { return MaterialApp( title: 'open url', home: Scaffold( appBar: AppBar( // Here we take the value from the MyHomePage object that was created by // the App.build method, and use it to set our appbar title. title: Text('hello flutter'), ), body: Center( child: Column( // Column is also a layout widget. It takes a list of children and // arranges them vertically. By default, it sizes itself to fit its // children horizontally, and tries to be as tall as its parent. // // Invoke "debug painting" (press "p" in the console, choose the // "Toggle Debug Paint" action from the Flutter Inspector in Android // Studio, or the "Toggle Debug Paint" command in Visual Studio Code) // to see the wireframe for each widget. // // Column has various properties to control how it sizes itself and // how it positions its children. Here we use mainAxisAlignment to // center the children vertically; the main axis here is the vertical // axis because Columns are vertical (the cross axis would be // horizontal). mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ Text( 'hello word flutter', ), RaisedButton( onPressed: () { const url = 'https://www.baidu.com'; http.get(url).then((response) { print("状态 is ${response.statusCode}"); print("内容 is ${response.body}"); } ); }, child: Text('test Http'), ), RaisedButton( onPressed: getWeatherData, child: Text('test HttpClient get weather'), ), ], ), ), ), ); } }
3 运行结果
点击test Http日志打印如下
I/flutter (27404): 状态 is 200 I/flutter (27404): 内容 is <html> I/flutter (27404): <head> I/flutter (27404): <script> I/flutter (27404): location.replace(location.href.replace("https://","http://")); I/flutter (27404): </script> I/flutter (27404): </head> I/flutter (27404): <body> I/flutter (27404): <noscript><meta http-equiv="refresh" content="0;url=http://www.baidu.com/"></noscript> I/flutter (27404): </body> I/flutter (27404): </html>
点击 test HttpClient get weather日志打印如下
I/flutter (27404): var returnCitySN = {"cip": "220.250.29.154", "cid": "350100", "cname": "福建省福州市"};
