okhttp的拦截器分为:Application Interceptor与Network Interceptor
他俩对应的添加方法为:
httpClient.addInterceptor(new CacheControlInterceptor());
httpClient.addNetworkInterceptor(new LogInterceptor());
对于俩拦截器的执行循序为:
首先执行Application interceptor的Request,
接下来执行NetWork Interceptor的Request,
接下来执行NetWork Interceptor的Response,
最后执行Application Interceptor的Response.