title: onPostExecute on cancelled AsyncTask
body: <p>Does <code>onPostExecute</code> execute if the <code>AsyncTask</code> has been cancelled?</p>
  
  <p>If it does execute, is it safe to say that I should always ask if the task has been cancelled (<code>isCancelled</code>) at the start of <code>onPostExecute</code>, before doing anything else?</p>