title: Retrofit ProgressBar
body: <p>I have recently studied about Retrofit. I am just implementing in my project. I have almost 20 plus api. I have declared all the methods like.</p>
  
  <pre><code>public interface RF_Calls {
  
      @POST(AppConstants.API_EVENTS_BYSTUDENTS)
      void getEvents(@Body JsonObject events);
  
      @POST(AppConstants.API_EXAMS_BYSTUDENTS)
      void getExamsbyStudents(@Body JsonObject exams);
   }
  </code></pre>
  
  <p>I just want a common progressbar for both the methods which has to dismissed once it get success and failure</p>