android:fitsSystemWindows=“true”

what’s system window

System windows are the parts of the screen where the system is drawing either non-interactive (in the case of the status bar) or interactive (in the case of the navigation bar) content.

behavior of the android:fitsSystemWindows=“true” attribute

it sets the padding of the View to ensure the contents don’t overlay the system windows.

Link

https://medium.com/google-developers/why-would-i-want-to-fitssystemwindows-4e26d9ce1eec