title: Android: How to retrieve file name and extension of a resource by resource ID
body: <p>I have the following:</p>
  
  <pre><code>getResources().getResourceEntryName(resourceId);
  </code></pre>
  
  <p>The problem is, that it retrieves only the file name without the extension.</p>
  
  <p>For example, if I have the following res/drawable/pic.jpg, the</p>
  
  <pre><code>getResources().getResourceEntryName(resourceId);
  </code></pre>
  
  <p>is returning the value "pic". The extension .jpg is missing.</p>