title: Create a public folder in internal storage
body: <p>Sorry for my English, but I want to write in this file because in my opinion is the best.
  Now my problem:
  I want to create a folder in Internal storage to share with 2 application.
  In my app, I downloaded an Apk from my server and I run it.
  Before I used external storage and everything worked.
  Now I want to use the internal storage for users that don't have an external storage.</p>
  
  <p>I use this:</p>
  
  <pre><code>String folderPath = getFilesDir() + "Dir"
  </code></pre>
  
  <p>but when i try to run the Apk, it doesn't work, and I can't find this folder on my phone.</p>
  
  <p>Thank you..</p>