How to include constraint layout to another constraint layout and set constraint between each

Question

I\'m using constraintLyout v 1.0.1.

I would like to include in my xml a sub ConstraintLayout corresponding to a part of my global layout (which itself is a Constrain

Answer 1

To inlude one constraint layout and constraint it according to one's need, one will have to give width and height to the included layout like this :