import 'package:dio/dio.dart';

import 'dart:async';

import 'dart:io';

import 'package:share/system/Object_category.dart';

enum Method { get, post }

const baseURL = "xxxxxxx";你的域名地址

const getSwiperURL = baseURL + "Swiper/ls";

const getUserInfoURL = baseURL + "User/get_info";

const postTaskURL = baseURL + "Task/create_task";

Future sendRequest(String url, Method method, Map map) async {

try {

print("开始请求数据");

Response response;

Dio dio = new Dio();

dio.options.contentType =

ContentType.parse("application/x-www-form-urlencoded").toString();

var type = method;

switch (type) {

case Method.get:

print('开始使用get');

response = await dio.get(url, queryParameters: map);

break;

case Method.post:

print('开始使用post');

FormData formData = FormData.fromMap(map);

response = await dio.post(url, data: formData);

break;

}

if (!empty(response.data)) {

print('收到返回信息==>' + response.data);

}

if (response.statusCode == 200) {

return response.data;

} else {

throw Exception('后端接口出现异常');

}

} catch (e) {

return print('error');

}

}

这个是用法

return Scaffold(

appBar: AppBar(

backgroundColor: Colors.blue,

title: Text("我的"),

),

backgroundColor: Colors.white,

body: FutureBuilder(

future: sendRequest(getUserInfoURL, Method.post, {'uid': 100}), //第一个参数是api地址，第二个是post请求，第三个是数据

builder: (context, snapshot) {

if (snapshot.connectionState == ConnectionState.done) {

if (snapshot.hasData) {

var obj = json.decode(snapshot.data.toString());

String username = obj['data']['nickname'];

String url = obj['data']['avatar'] == null

? ''

: obj['data']['avatar'];

return ListView(

children: [

_topHeader(username, url),

_actionList(),

],

);

} else {

return Container(

alignment: Alignment.center, child: Text('加载失败请重新加载'));

}

} else {

return Container(

alignment: Alignment.center,

child: CircularProgressIndicator());

}

}));

}

}

一般的使用方法

sendRequest(postTaskURL, Method.post, map).then((value) {

print(value);

var obj = json.decode(value.toString());

if (obj['code'] == 1) {

print(obj['data']);

//成功之后这边做相应的操作

}

}).catchError((error) {

if (error) {

print(error.toString());

}

});