title: How to send multipart request using Volley without HttpEntity?
body: <p>I am following the solution to send multi-part request using volley from <a href="https://stackoverflow.com/questions/18288864/how-to-multipart-data-using-android-volley">How to multipart data using Android Volley</a>. But, since SDK 22, httpentity is deprecated and it's removed completely on SDK 23.</p>
  
  <p>The solution is to use openConnection, just like <a href="https://stackoverflow.com/questions/29150184/httpentity-is-deprecated-on-android-now-whats-the-alternative">HttpEntity is deprecated on Android now, what&#39;s the alternative?</a>, but I don't know how to use it for multi-part request</p>