5-1 HTTP請求

1. https://pub.dartlang.org/packages/http
2. 開啟pubspec.yaml在dependencies下加入：

   dependencies:
     flutter:
       sdk: flutter
   
     # The following adds the Cupertino Icons font to your application.
     # Use with the CupertinoIcons class for iOS style icons.
     cupertino_icons: ^0.1.2
     url_launcher: ^5.0.1
     http: ^0.12.0+1

    

3. 完整範例：

   import 'package:flutter/material.dart';
   import 'package:http/http.dart' as http;
   
   void main() => runApp(new MyApp());
   
   class MyApp extends StatelessWidget {
     @override
     Widget build(BuildContext context) {
       return new MaterialApp(
         title: 'http請求範例',
         home: new Scaffold(
           appBar: new AppBar(
             title: new Text('http請求範例'),
           ),
           body: new Center(
             child: new RaisedButton(
               onPressed: (){
                 var url='https://schoolweb.tn.edu.tw';
                 http.get(url).then((response){
                   print("狀態：${response.statusCode}");
                   print("正文：${response.body}");
                 });
               },
               child: new Text('發起http請求'),
             ),
           ),
         ),
       );
     }
   }
   

   執行結果可以從編輯器下方的「偵錯主控台」觀看（並不會呈現在主機上）