网络请求框架我一直都使用httpclient，后来改成了xutils，但是去年开始自从Android6.0去掉了httpclient的支持，想要使用还要在build.gradle添加useLibrary 'org.apache.http.legacy'，加上google的推广，Okhttp变得非常火了起来，于是自己也修改自己的网络框架。
我使用时OkHttp已经出现3.0的版本了，与2.0的版本还是有一些差别的
get
基本上没有什么区别
2.0
OkHttpClient client = new OkHttpClient();
client.setConnectTimeout(15,TimeUnit.SECONDS);
client.setWriteTimeout(20,TimeUnit.SECONDS);
client.setReadTimeout(20,TimeUnit.SECONDS);
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
3.0
OkHttpClient client = new OkHttpClient();
client.newBuilder().connectTitmeout(15,TimeUnit.SECONDS)
client.newBuilder().readTimeout(15,TimeUnit.SECONDS)
client.newBuilder().wirteTimeout(15,TimeUnit.SECONDS)
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
post
取消了FormEncodingBuilder使用FormBody
2.0
OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new FormEncodingBuilder() .add("","").add("","").build();
Request request = new Request.Builder().url(url).post(requestBody).build();
Response response = client.newCall(request).execute();
3.0
OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new FormBody.Builder().add("","").add("","").build();
Request request = new Request.Builder().url(url).post(requestBody).build();
Response response = client.newCall(request).execute();
上传文件
MultipartBuilder改为MultipartBody
2.0
OkHttpClient client = new OkHttpClient();
MultipartBuilder multipartEntity = new MultipartBuilder().type(MultipartBuilder.FORM);
File file = new File(tmepName);
RequestBody fileBody = RequestBody.create(MediaType.parse("image/*"), file);
multipartEntity.addFormDataPart(key,file.getName(), fileBody);
multipartEntity.addFormDataPart(key, value);
RequestBody requestBody = multipartEntity.build();
Request request = new Request.Builder().url(url).post(requestBody).build();
Response response = client.newCall(request).execute();
3.0
OkHttpClient client = new OkHttpClient();
MultipartBody.Builder multipartEntity = new MultipartBody.Builder();
File file = new File(tmepName);
RequestBody fileBody = RequestBody.create(MediaType.parse("image/*"), file);
multipartEntity.addFormDataPart(key,file.getName(), fileBody);
multipartEntity.addFormDataPart(key, value);
RequestBody requestBody = multipartEntity.build();
Request request = new Request.Builder().url(url).post(requestBody).build();
Response response = client.newCall(request).execute();
cookie
使用cookieJar替代cookieHandler
持久化文件
2.0
client.setCookieHandler(new CokieManager(new PersistentCookieStore(context), CookiePolicy.ACCEPT_ALL));
3.0
client.newBuilder().cookieJar(new CookiesManager());
以上就是OkHttp的简单使用以及2.0与3.0的差异，下一篇我们讲解retrofit。
