title: Android : Send Multiple images as file to server using retrofit in an array
body: <p>I need to send 4 images as files to server ( i can not convert to bitmap or string ) ,The server should receive all 4 files in a array (   files[ ]   ) as a array only. How can i achieve this in android using RETROFIT </p>
  
  <p>see below for required server upload</p>
  
  <pre><code>D/OkHttp: pics=[image1,image2,image3,image4]&amp;txt=&amp;pic=true&amp;type=img
  </code></pre>