@Laxmi_Rukka i do not understand - why you can not test yourself?
i tested with mine app:
System.out.println(((AndroidDriver)driver).currentActivity());
((AndroidDriver)driver).pressKeyCode(AndroidKeyCode.HOME);
sleep(3);
System.out.println(((AndroidDriver)driver).currentActivity());
sleep(100);
got output:
my_package_name.activity.SplashScreenActivity
sleep - 3
.Launcher
sleep - 100
“.Launcher” is LG phone launcher activity