Do I need to stop GPS usage once MapView activity is closed?

Currently I display user's location at MapView:

MyLocationOverlay myLocationOverlay = new MyLocationOverlay(this, mapView);     
mapView.getOverlays().add(myLocationOverlay);      
myLocationOverlay.enableMyLocation(); 

But once user closes MapView activity (press ba开发者_Python百科ck button) or even closes MainActivity (presses back again), GPS icon is still displayed in the status bar. Looks like GPS is still used. Should I do something in my code to avoid that?

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Yes you need to stop GPS usage to avoid battery draining, following methods will stop GPS usage used in relevant methods like OnPause, onStop, onDestroy:

MyLocationOverlay.disableMyLocation();
LocationManager.removeUpdates(LocationListener);