title: How to delete cache-folder of app?
body: <p>I read through the Android documentation of the cache <em>(see <a href="http://developer.android.com/guide/topics/data/data-storage.html#ExternalCache" rel="noreferrer">Data Storage Documentation</a>)</em> but I didn't got how I can clean the whole folder.</p>
  
  <p>So how can I delete the cache-folder of my app? It's in this path: </p>
  
  <blockquote>
    <p>/Android/data/de.stepforward/cache/</p>
  </blockquote>