Android Question Fill screen

What exactly do you want to do?
Your title says Fill screen.
But you try to set the Bottom property of the view to 50%y, why?
Then you set the Top property of the view to 50%x, why?
If you want to fill the screen you should set the two anchors, horizontal and vertical, to BOTH.
Then if you don't want to fill the whole screen you may set:
SetHorizontal(Left, Right) and SetVertical(Top, Bottom)
And why, for vertical coordinates using for Bottom 50%y and for Top 50%x a horizontal value !?
In this case in landscape orientation Top (50%x) will be bigger Bottom (50%y) !