Keyboard OnAppearing / OnDisappearing

Hi.

when an entry is focused the keyboard appears and in this case some parts of my UI are hidden by the keyboard.
So I want to move some objects when the keyboard appears and move again when the keyboard disappears.

Are there some methods that say me if a keyboard is appearing/disappearing? (like the methods OnAppearing / OnDisappearing in a contentPage).

if not, do you have some tips to accomplish this task?

thanks