мейби
Код AS3:
stage.addEventListener(Event.DEACTIVATE, stage_deactivateHandler, false, 0, true);
private function stage_deactivateHandler(event:Event):void
{
this._starling.stop();
this.stage.addEventListener(Event.ACTIVATE, stage_activateHandler, false, 0, true);
}
private function stage_activateHandler(event:Event):void
{
this.stage.removeEventListener(Event.ACTIVATE, stage_activateHandler);
this._starling.start();
}