title: how does a service return result to an activity
body: <p>I seem to have a classic task, yet I can't find any examples on how to do it.</p>
  
  <p>I want to download something. Well I call a web service and get a response... but it's pretty much the same.</p>
  
  <p>In order to do this I have an activity that starts a service that spawns a thread that does the job.</p>
  
  <p>Now i would like to use the data I got in the activity that started the service.</p>
  
  <p>(I assume that starting another activity to handle the job of displaying the result would be simple)</p>
  
  <p>My problem is how does the service notify an activity (the one that started it or another one) of something?</p>
  
  <p>Any pointers to examples are much appreciated.</p>
  
  <p>Regards</p>