話不多說自己看代碼封裝的比較簡單，比較適合入門學習Dio。

import 'package:dio/dio.dart';

import 'Api.dart';

/*

* 封裝 restful 請求

*

* GET、POST、DELETE、PATCH

* 主要作用為統一處理相關事務：

* - 統一處理請求前綴；

* - 統一打印請求信息；

* - 統一打印響應信息；

* - 統一打印報錯信息；

*/

class DioUtils {

/// global dio object

static Dio dio;

/// default options

static const int CONNECT_TIMEOUT = 10000;

static const int RECEIVE_TIMEOUT = 3000;

static const String TOKEN = "1373a739fd8599909738511f41831623";

/// http request methods

static const String GET = 'get';

static const String POST = 'post';

static const String PUT = 'put';

static const String PATCH = 'patch';

static const String DELETE = 'delete';

/// 創建 dio 實例對象

static Dio createInstance() {

if (dio == null) {

/// 全局屬性：請求前綴、連接超時時間、響應超時時間

var options = BaseOptions(

connectTimeout: 150000,

receiveTimeout: 150000,

responseType: ResponseType.json,

validateStatus: (status) {

// 不使用http狀態碼判斷狀態，使用AdapterInterceptor來處理(適用于標準REST風格)

return true;

},

baseUrl: Api.baseUrlDevelop,

headers: httpHeaders);

dio = new Dio(options);

}

return dio;

}

/// 清空 dio 對象

static clear() {

dio = null;

}

///Get請求

static void getHttp(

String url, {

parameters,

Function(T) onSuccess,

Function(String error) onError,

}) async {

///定義請求參數

parameters = parameters ?? {};

//參數處理

parameters.forEach((key, value) {

if (url.indexOf(key) != -1) {

url = url.replaceAll(':$key', value.toString());

}

});

try {

Response response;

Dio dio = createInstance();

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

var responseData = response.data;

if (responseData['erroCode'] == 2000) {

if (onSuccess != null) {

onSuccess(responseData['result']);

}

} else {

throw Exception('erroMsg:${responseData['erroMsg']}');

}

print('響應數據：' + response.toString());

} catch (e) {

print('請求出錯：' + e.toString());

onError(e.toString());

}

}

///Post請求

static void postHttp(

String url, {

parameters,

Function(T) onSuccess,

Function(String error) onError,

}) async {

///定義請求參數

parameters = parameters ?? {};

//參數處理

parameters.forEach((key, value) {

if (url.indexOf(key) != -1) {

url = url.replaceAll(':$key', value.toString());

}

});

try {

Response response;

Dio dio = createInstance();

response = await dio.post(url, queryParameters: parameters);

var responseData = response.data;

if (responseData['erroCode'] == 2000) {

if (onSuccess != null) {

onSuccess(responseData['result']);

}

} else {

throw Exception('erroMsg:${responseData['erroMsg']}');

}

print('響應數據：' + response.toString());

} catch (e) {

print('請求出錯：' + e.toString());

onError(e.toString());

}

}

/// request Get、Post 請求

//url 請求鏈接

//parameters 請求參數

//method 請求方式

//onSuccess 成功回調

//onError 失敗回調

static void requestHttp(String url,

{parameters,

method,

Function(T t) onSuccess,

Function(String error) onError}) async {

parameters = parameters ?? {};

method = method ?? 'GET';

if (method == DioUtils.GET) {

getHttp(

url,

parameters: parameters,

onSuccess: (data) {

onSuccess(data);

},

onError: (error) {

onError(error);

},

);

} else if (method == DioUtils.POST) {

postHttp(

url,

parameters: parameters,

onSuccess: (data) {

onSuccess(data);

},

onError: (error) {

onError(error);

},

);

}

}

}

/// 自定義Header

Map httpHeaders = {

'Accept': 'application/json,*/*',

'Content-Type': 'application/json',

'token': DioUtils.TOKEN

};

使用

var param = {

'taskCode ': 'XC202001020003'};

DioUtils.requestHttp(

Api.verificationSurvey,

parameters: param,

method:DioUtils.GET,

onSuccess: (data) {

},

onError: (error) {

},

);

}

總結

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