flutter中 Dio 简单 封装

import 'dart:convert';

import 'package:dio/dio.dart';

/*
Dio封装 get，post  文件下載 down
 */
enum Method { get, post ,down}

Future sendRequest(String urlString, Method method, Map<String, dynamic> map) async {
  try {
    print('1');
    Response response;
    //实例化Dio对象
    BaseOptions options = new BaseOptions(
      baseUrl: "https://www.w3cschool.cn",
      connectTimeout: 5000,
      receiveTimeout: 3000,
    );
    Dio dio = new Dio(options);
    var type = method;
    switch (type) {
      case Method.get:
        print('get请求');
        response = await dio.get(urlString, queryParameters: map);
        break;
      case Method.post:
        print('post请求');
        FormData formData = FormData.fromMap(map);
        response = await dio.post(urlString, data: formData);
        break;
      case Method.down:
        print('文件下载');
        String savePath = map['savePath'];
        response = await dio.download(urlString, savePath);
        break;
    }
    print(response);
    //成功返回数据
    if (response.statusCode == 200) {
      //json.decodez转化为dart对象
      return json.decode(response.data);
    } else {
      throw Exception('接口异常了');
    }
  } catch (e) {
    return print(e);
  }
}

调用方式

sendRequest('/index/rightFloatAdvert', Method.post, {'data': 1})
    .then((value) {
  setState(() {
    result = 'Post請求：${value}';
  });
}).catchError((error) {
  if (error) {
    print(error.toString());
  }
});