title: Which Thread will a Service run in?
body: <p>I have an Activity A that starts a service S via startService method.
  <br /> Now as per the documentation Service S will run on main thread or the UI thread
  <br /> Now my question is when activity A is destroyed will the UI thread still exist? <br /> What will happen if I reopen the Activity A through its launcher icon will there be two UI threads spawned in total?
  <br/>Thanks in Advance.</p>