Liferay Screens automatically saves and restores Screenlets’ states using the
Android SDK methods onSaveInstanceState and onRestoreInstanceState. Each
Screenlet uses a uniquely generated identifier (screenletId) to assign action
results to action sources.
The Screenlets’ states are restored after the onCreate and onStart methods, as
specified by the
standard Android lifecycle.
It’s a best practice to execute Screenlet methods inside the activity’s
onResume method; this helps assure that actions and tasks find their
destinations.