What lifecycle methods of an activity are activated when switching from one screen to another in Android?

When switching from one screen to another in Android, a sequence of lifecycle methods of the activity are called, which manage the state of the current and new screens.

If we transition from Activity A to Activity B, the methods called for Activity A are:

• onPause() — the activity goes into a paused state, the user no longer interacts with it.
• onStop() — the activity becomes invisible.

For Activity B, the methods called are:

• onCreate() — creating and initializing the activity.
• onStart() — the activity becomes visible.
• onResume() — the activity gains focus and starts interacting with the user.

If Activity A is not destroyed (for example, during a normal transition), onDestroy() is not called for it.

Summary:

Activity A (old screen)	Activity B (new screen)
onPause()	onCreate()
onStop()	onStart()
	onResume()

This allows proper management of resources and state of each screen during navigation.