What's the difference between blank activity and basic activity in Android studio?

Empty activity : It has just the white screen and nothing else.

Basic activity : It has some ready made contents (like action bar ) etc. you can see there will be activity_content.xml gets generated automatically.

1.) Blank Activity is the same as Empty Activity.

2.) Blank Activity is the simplest activity which you can create.

Basic Activity is more advanced than Empty/Blank Activity because have toolbar and one button (FAB).

Empty activity is the most elementary activity that we have in android. It is like a blank screen, whereas a blank activity has some extra features like the app bar and a floating action button.