Android - Align view center to bottom of other view

Question

A picture tells more than a lengthy speech :

I want to align vertically the center of the red part with the middle of the black part. I have no constraint of contai

Answer 1

Here I am using two different View as black and red.

The trick is I have put the red container below the black container and set its marginTop to negative half of its height. So the center of red container is at the bottom of black container.