title: Downloadmanager Concept
body: <p>cause the android build in downloadmanager is not reachable by sdk applications i have to implement one by myself. Before starting i want to get feedback how to make it the best way. So here we go:</p>
  
  <p>Requirements:</p>
  
  <p>basic:
  Listview with one download per row
  button to cancel active downloads
  progress view of the downloads
  (and so on)
  (no questions so far)</p>
  
  <p>I have to reach the downloadmanager from my main activity, start a download -> change to downloadmanager activity and then change back to the main activity but the downloadactivity should stay in the background downloading.</p>
  
  <p>So whats the best way implementing this? Is it possible to keep an activity active in the background, then i could use asynctask to download the files. If not, is it better to use a service and reach that service by the downloadmanager activity so i can close the activity while downloading.</p>
  
  <p>Would be nice to get some input from the experts cause i'm still a beginner.</p>
  
  <p>Thank you</p>