dio是Flutter中文网开源的一个强大的Dart Http请求库，支持Restful API、FormData、拦截器、请求取消、Cookie管理、文件上传/下载、超时等...

1.添加依赖＃

dependencies:

dio: 2.1.x #latest version

2.导入库

import 'package:dio/dio.dart'; //导入前需要配置

get

String data;

void _getDio() async {

Response response =

await Dio().get("https://jsonplaceholder.typicode.com/posts/1");

print("get ====== "+response.toString());

final body = json.decode(response.toString());

setState(() {

data = body['title'];

print("title ====== "+data);

});

}

post

void _postDio() async {

var headers = Map();

headers['loginSource'] = 'IOS';

headers['useVersion'] = '3.1.0';

headers['isEncoded'] = '1';

headers['bundleId'] = 'com.nongfadai.iospro';

headers['Content-Type'] = 'application/json';

Dio dio = Dio();

dio.options.baseUrl = "http://api.juheapi.com/japi/toh";

dio.options.connectTimeout = 60000;

dio.options.receiveTimeout = 60000;

dio.options.headers.addAll(headers);

dio.options.method = 'post';

var params = {

'v': '1.0',

'month': '7',

'day': '25',

'key': 'bd6e35a2691ae5bb8425c8631e475c2a'

};

Options option = Options(method: 'post');

Response response = await dio.post("http://api.juheapi.com/japi/toh",

/*data: {

"v": "1.0",

"month": "7",

"day": "25",

"key": "bd6e35a2691ae5bb8425c8631e475c2a"

},*/

data: params,

options: option);

if (response.statusCode == 200) {

debugPrint('===请求求url: ${response.request.uri.toString()}');

debugPrint('===请求headler: ${response.request.headers}');

debugPrint('===请求结果: \n${response.data}\n');

} else {

print('请求失败');

}

}

调用：

import 'dart:convert';

import 'package:flutter/material.dart';

import 'package:dio/dio.dart';

class HttpDemo1 extends StatefulWidget {

@override

State createState() {

// TODO: implement createState

return new HttpPage();

}

}

class HttpPage extends State {

@override

void initState() {

// TODO: implement initState

super.initState();

_getDio();

_postDio();

}

@override

Widget build(BuildContext context) {

// TODO: implement build

return new Scaffold(

appBar: new AppBar(

title: new Text("Dio网络请求"),

),

body: new Center(

child: new Text("$data"),

),

);

}

}

控制台

Dio库 说明文档