title: How to create directory automatically on SD card
body: <p>I'm trying to save my file to the following location<br>
  <code>FileOutputStream fos = new FileOutputStream("/sdcard/Wallpaper/"+fileName);</code>
  but I'm getting the exception <code>java.io.FileNotFoundException</code><br>
  However, when I put the path as <code>"/sdcard/"</code> it works.</p>
  
  <p>Now I'm assuming that I'm not able to create directory automatically this way.</p>
  
  <p>Can someone suggest how to create a <code>directory and sub-directory</code> using code?</p>