title: Volley image caching system not working
body: <p>I was creating a custom list view app from the <code>Android Hive</code> tutorial at
  <a href="http://www.androidhive.info/2014/06/android-facebook-like-custom-listview-feed-using-volley/" rel="nofollow">http://www.androidhive.info/2014/06/android-facebook-like-custom-listview-feed-using-volley/</a>
  that uses the Volley Library to make network calls and which uses its powerful image caching mechanism.</p>
  
  <p>But when I restart this application all the images cached are deleted and all of them are loaded once again into the app. What is this problem? Or am I getting something wrong? </p>