This is something accomplished using Barrier in ConstraintLayout, but I think we can make it more straightforward.

Given views A, B, C:

Scenarios

1. Aligning a view A to at any given time be to the left of both B and C
2. Aligning a view A to at any given time be to the right of both B and C
3. Aligning a view A to at any given time be horizontally centered to the middle point between B and C
4. Aligning a view A to at any given time be above both B and C
5. Aligning a view A to at any given time be below both B and C
6. Aligning a view A to at any given time be vertically centered to the middle point between B and C

When the layout of B or C is updated, the positioning of A must be updated.