gistfile1.txt

        if (!download_data.getBoolean("currently_downloading", false))
        {
          //find the first one whose percent is 0 and start it.
          Map<String, ?> items = download_data.getAll();
          for(Map.Entry<String,?> entry : items.entrySet()){
            if (entry.getValue() instanceof Integer) { //this is a cheap way to test if the key/value pair is 'about' a download. All other values, e.g. 'currently_downloading' are not Integers. This may change. 
              if (entry.getValue() == 0)
              {
                Integer position = Integer.parseInt(entry.getKey());
                Download d       = new Download();
                d.start(position);
                return;
              }
            }
          }
        }