android - Closing Activity causes a FC when Service is running -

i have long-running process implemented service. start service activity using startservice , bindservice , unbindservice in onstop() method. service uses timer parse xml , download assets , has potential run while.
here's problem: fc when close activity , timer running. seems when posting http fc happens. ideas? services have independent of activities , contain no references them?

private void startservice()  {      final handler handler = new handler();     final runnable runnable = new runnable()      {         public void run()          {             if(!isrunning) {                 isrunning = true;                 log.v(tag, "running download task");                 fgapp.getcdninfo(true, false);             }             else {                 isrunning = false;                 log.v(tag, "download task running");             }         }     };       timer = new timer();     timer.scheduleatfixedrate(new timertask()      {          public void run()         {              handler.post(runnable);         }       }, 1000, delay);  }