http请求-Dio

import 'package:flutter/material.dart';
import 'package:dio/dio.dart';

class HttpDio extends StatefulWidget {
  HttpDio({Key key}) : super(key: key);

  @override
  _HttpDioState createState() => _HttpDioState();
}

class _HttpDioState extends State<HttpDio> {
  Dio _dio = new Dio();
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: new AppBar(
          title: Text('http请求--HttpClient'),
        ),
        body: Container(
          alignment: Alignment.center,
          child: FutureBuilder(
            future: _dio.get("https://api.github.com/orgs/flutterchina/repos"),
            builder: (BuildContext context, AsyncSnapshot snapshot) {
              //请求完成
              if (snapshot.connectionState == ConnectionState.done) {
                Response response = snapshot.data;
                //发生错误
                if (snapshot.hasError) {
                  return Text(snapshot.error.toString());
                }
                //请求成功，通过项目信息构建用于显示项目名称的ListView
                return ListView(
                  children: response.data
                      .map<Widget>((e) => ListTile(title: Text(e["full_name"])))
                      .toList(),
                );
              }
              //请求未完成时弹出loading
              return CircularProgressIndicator();
            },
          ),
        ),
      ),
    );
  }
}