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写在前面: Retrofit与okhttp共同出自于Square公司，是目前市场上使用最多的联网框架,retrofit是对okhttp做了一层封装,不过封装之后的retrofit上手还是极其复杂,为了解决使用难度问题,本文推荐使用github开源项目RetrofitUtils.
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RetrofitUtils开源项目地址：https://github.com/open-android/RetrofitUtils
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定义我们请求的Api，我们假设是这样的:
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返回服务器的数据
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大家看简单实用只需要new一个request然后发送一个send请求,就能返回服务器的数据,并且压根不需要解析拿到的直接就是各位需要的bean对象.那么我们来看看RetrofitUtils的使用步骤
在project的build.gradle添加如下代码(如下图)
引入当前项目
compile 'com.github.open-android:RetrofitUtils:0.1.9' 在清单文件添加如下权限
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 新建Application类并且在oncreate方法当中进行初始化： 千万注意Application记得在manifest.xml中注册。
ItheimaHttp.init(this, Urls.getBaseUrl()); eg:请求地址:http://www.oschina.net/action/apiv2/banner?catalog=1
那么baseUrl = http://www.oschina.net RetrofitUtils内部封装了如下使用方法
看一个完整Get和Post请求是如何实现：异步请求（内部使用Gson解析json数据）直接返回实体bean对象
Request request = ItheimaHttp.newGetRequest(apiUrl);//apiUrl格式："xxx/xxxxx" Call call = ItheimaHttp.send(request, new HttpResponseListener<Bean>() { @Override public void onResponse(Bean bean) { ........ } /** * 可以不重写失败回调 * @param call * @param e */ @Override public void onFailure(Call<ResponseBody> call, Throwable e) { ...... } }); @param httpResponseListener 回调监听 @param <T> Bean @return Call可以取消网络请求</span> 添加请求参数
request.putParams(key,value) .putParams(key,value) .putParams(key,value); Map<String,Object> map = new HashMap<>(); map.put(key,value); request.putParamsMap(map); 添加请求头
request.putHeader(key,value) .putHeader(key,value); 如果不需要RetrofitUtils框架自动解析json,那么可以使用如下请求
Call call = ItheimaHttp.getAsync(apiUrl, new HttpResponseListener<String>); Call call = ItheimaHttp.postAsync(apiUrl, new HttpResponseListener<String>() { @Override public void onResponse(String s) { ........ } }); 如果需要RetrofitUtils框架自动解析json,直接获取javabean,那么可以使用如下请求
Call call = ItheimaHttp.getAsync(apiUrl, new HttpResponseListener<Bean>); Call call = ItheimaHttp.postAsync(apiUrl, new HttpResponseListener<Bean>() { @Override public void onResponse(Bean bean) { ........ } }); 文件上传
Request request = ItheimaHttp.newUploadRequest("http://xxx/xxx/xxx", RequestMethod.POST); request.putUploadFile(uploadFile).putMediaType(MediaType.parse("multipart/form-data")); ItheimaHttp.upload(request, new UploadListener() { @Override public void onResponse(Call call, Response response) { //上传成功回调 } @Override public void onProgress(long progress, long total, boolean done) { //上传进度回调progress:上传进度，total:文件长度， done:上传是否完成 } @Override public void onFailure(Call call, Throwable t) { //上传失败 } }); 取消网络请求
call.cancel();