title: onPostExecute not called after completion AsyncTask
body: <p>For some reason my <code>onPostExecute()</code> is not called after my <code>AsyncTask</code> finishes.</p>
  
  <p>My class decleration:</p>
  
  <p><code>public class setWallpaperForeground extends AsyncTask&lt;String, Integer, Boolean&gt;</code></p>
  
  <p>My onPostExecute():</p>
  
  <p><code>protected void onPostExecute(Boolean result)</code></p>
  
  <p>Everything works fine, my <code>doInBackground()</code> completes successfully and returns a Boolean but then it just finishes.</p>
  
  <p>Thanks</p>