Android activity lifecycle: state order when new activity starts

Question

If I launch Activity2 from Activity1 by this way: startActivity(Activity2); what executes first: onStop() (Activity1) or onStart() (Activity2) ?

Do they work simultaneously or in turn? If one after another, what is first?

So in general : what is the activity's state order when first activity starts second, if this order exists?

Answer 1

when I have checked it by programmatically its following all steps and easy to understand

Answer 2

Let Say Activity A is starting Activity B by Calling StartActivity(Intent) method then lifecycle call be like this :-

• A onCreate()
• A onStart()
• A onResume()

Now Button click for startActivity(intent)

• A onPause()

• B onCreate()

• B onStart()

• B onResume()

• A onStop()

..... If you press back button from Activity B then lifeCycle call will be .....

• B onPause()

• A onRestart()

• A onStart()

• A onResume()

• B onStop()
• B onDestory()

Now one more scenario "From Activity A start Activity B by calling StartActivity(Intent) on button click and use finish() method inside onstart() method on Activity B"

• A onPause()

• B onCreate()

• B onStart()

• A onResume()

• B onStop()

• B onDestory()