title: how to close or hide my alert boite dialog before a laps of time?
body: <p>in my application I upload some items and data from internet, so I would show AlertDialog.Builder when when this uplaods was not finish.</p>
  
  <p>that will be automatically.</p>
  
  <p>I have no idea how to do it, put callbacks or some what, do synchronization,... ?</p>
  
  <p>thinks for all.</p>