title: Android multiple request for real time data
body: <p>I am using Retrofit2 in my application. My problem is that I have a group of persons in my list and all these persons are to be continuously monitored.
    Monitoring in the sense that I need to make a retrofit call for each person ,to obtain the real time data of that person.
    For example,</p>
  
  <pre><code> Consider person 1 :
      My initial request call will be with the following data.
      {
       "patientId" : "qwerty1",
       "time": ""
      }
      Response is:
     {
       "data" : [],
       "updated_time" : "16519644"
     }
  
     Next request for person 1 :
      {
        "patientId" : "qwerty1",
        "time": "16519644"
      }
  </code></pre>
  
  <p>and this repeats. Server side coding is in such a way that only a set of 20 data are provided as response for our request. So to obtain continuous data set we need to make repeated call. I need to do this process for "n" number of persons in real time. Also I need to update UI when there is a response. I am really confused with the concept of sending retrofit request in a loop. Please suggest a way.</p>