一、Http请求

一、配置pubspec.yaml文件

//pubspec.yaml
dependencies:
  dio: 2.1.16

二、先导入、后请求

import 'package:flutter/material.dart';
import 'package:dio/dio.dart';
class _MyHomeState extends State {
  @override
  String msg;
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('首页'),
      ),
      body: Row(
        mainAxisAlignment: MainAxisAlignment.start,
        children: <Widget>[
          FlatButton(
            child: Text("发送http"),
            onPressed: getHttp,
            ),
            Text("$msg")
        ],
      ),
    );
  }
  void getHttp() async {
    try {
      Response response = await Dio().get("https://douban.uieee.com/v2/movie/in_theaters");
      var title = response.data["title"];
      setState(() {
        msg = title;
      });
    } catch (e) {
      print(e);
    }
  }
}