title: Execute AsyncTask several times
body: <p>In my Activity I use a class which extends from AsyncTask and a parameter which is an instance of that AsyncTask. When I call <code>mInstanceOfAT.execute("")</code> everything is fine.
  But the app crash when I press an update button which calls again the AsyncTask(In case the network job didnt work). Cause then appears an Exception which says </p>
  
  <blockquote>
    <p>Cannot execute task: the task has
    already been executed (a task can be
    executed only once)</p>
  </blockquote>
  
  <p>I have tried calling cancel(true) for the instance of the Asyctask, but it doesnt work either. The only solution so far it's to create new instances of the Asyntask. Is that the correct way?</p>
  
  <p>Thanks.</p>