Android에서 back버튼 클릭 시 앱종료가 아닌 다른 프로세스 실행

if(Capabilities.cpuArchitecture=="ARM")
{
	NativeApplication.nativeApplication.addEventListener(Event.ACTIVATE, handleActivate, false, 0, true);
	NativeApplication.nativeApplication.addEventListener(Event.DEACTIVATE, handleDeactivate, false, 0, true);
	NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_DOWN, handleKeys, false, 0, true);
}

Define handlers:

private function handleActivate(event:Event):void
{
	NativeApplication.nativeApplication.systemIdleMode = SystemIdleMode.KEEP_AWAKE;
}
 
private function handleDeactivate(event:Event):void
{
	NativeApplication.nativeApplication.exit();
}
 
private function handleKeys(event:KeyboardEvent):void
{
	if(event.keyCode == Keyboard.BACK)
	NativeApplication.nativeApplication.exit();
}