title: Android Studio create A folder in R.raw
body: <p>I want to create folder in <code>R.raw</code> to classify my media source.</p>
  
  <p>But when I try to read the folder in <code>R</code>, I can't found the folder.  </p>
  
  <pre><code> R.raw.folderName
  </code></pre>
  
  <p>How can I solve the problem?</p>