Is scroll to top with Android native back button a common pattern?

1. How do you scroll to the top on Android?
2. Do all Android phones have back button?
3. What is on back pressed Android?
4. Where to place back button?

How do you scroll to the top on Android?

The default gesture there for scroll to top or bottom is 3 finger swipe that's the same as OP5 gesture for taking screenshot, but you can change it in application settings to another - I use 2 fingers swipe.

Do all Android phones have back button?

All Android devices provide a Back button for this type of navigation, so you should not add a Back button to your app's UI. Depending on the user's Android device, this button might be a physical button or a software button.

What is on back pressed Android?

What is onBackPressed() in Android? This is an override function called when the user presses the back button on an Android device. It has great implications on the activity lifecycle of the application.

Where to place back button?

Right: back button above the form (good). Some forms or questionnaires appear across multiple pages and some people want to go back to check or change their answers.