Android Question Manipulate Android back button

[RB Smissaert]

Would it be possible to do this to make a custom keyboard behave like the default Android keyboard?
So, when the custom keyboard shows the back button points down and when it doesn't show it points left.

RBS

 

[RB Smissaert]

Would it be possible to do this to make a custom keyboard behave like the default Android keyboard?
So, when the custom keyboard shows the back button points down and when it doesn't show it points left.

RBS

I take it this is not possible then or there might be problems with it.
For example Android might behave as if the Android keyboard is showing when it it isn't.

RBS