Background thread never get destroy

I am very new to android development so please forgive me if I am wrong. I believe the ChronometerDrawer did not get destroy. The function SurfaceDestroyed never get called. So the Thread keeps running at the background even thou the card is remove from the timeline.

[r-b-us]

In StopWatchService.java onDestroy, the LiveCard must be unpublished before the callback is removed. Just move the unpublish to before the callback remove and it works. Did for me anyway.