title: How to get all Phone Storage(internal storage) directory list
body: <p>I want to get all files list of internal storage. I've write this code, </p>
  
  <pre><code>File dir= getFilesDir();
          File[] list = dir.listFiles();
          for(File ff: list) {
              Toast.makeText(getApplicationContext(), ff.getName() , Toast.LENGTH_LONG).show();
  
          }
  </code></pre>
  
  <p>it just gives me <strong>Directory name: instant-run</strong> on Toast but my internal storage has many direcoties as you can see below picture, 
  <a href="https://i.stack.imgur.com/AGoiD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AGoiD.png" alt="enter image description here"></a></p>
  
  <p>kindly tell me how to get all these directories name. </p>