Flutter 4.1 网络请求

1.json字符串转map

json.decode(strData)

2.map转json字符串

json.encode(mapData)

需要引入 dart:convert 这个库

http 第三方库 自己看就好了

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

class MyRequest extends StatelessWidget {
  _getRequest() async{
var url = "http://route.showapi.com/1211-1";
var response = await http.get(url);
  if (response.statusCode == 200) {
    var jsonResponse = convert.jsonDecode(response.body);
    var itemCount = jsonResponse['totalItems'];
    print('Number of books about http: $jsonResponse.');
  } else {
    print('Request failed with status: ${response.statusCode}.');
  }

  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("请求"),
      ),
      body: Column(
        children: <Widget>[
         RaisedButton(
           color: Colors.red,
           
           onPressed: _getRequest
         ),
         RaisedButton.icon(
           onPressed: (){

           },
           label: Text("data"),
           icon: Icon(Icons.save),
         )
        ],



      ),
    );
  }
}