How to constraint a view to overlap another view in RelativeLayout

Question

I am overlapping an ImageView on top of a View in a RelativeLayout.

something like this:

1

Where the middle white circle(ImageView) is overlapping the white vertical border(View).

But for some reason I am not managing to constraint the circle above the z position of the white border. and if the border moves say to the right side of the screen, I want the circle to move there too. but instead the circle always remains in the center regardless to the position of the border. How do I this in a RelativeLayout?

TIA

Answer 1

You can make like:
AlignLeftOf the border

Then code: circle.translationX( circle_width/2)
(and a bit of justification, it should be good)