Margin Left in Constraint Layout on Android does not work

Question

I have tried to set the margins to a ConstraintSet into the ConstraintSet.LEFT anchor. But it doesn't work. However when using the ConstraintSet.START anchor, it works.

I am using constraints programmatically, and I tried setting the margins with both ConstraintSet.connect, as in:

(Does't work)

set.connect(view.getId(), ConstraintSet.LEFT, ConstraintSet.PARENT_ID, ConstraintSet.LEFT, MARGIN);

(Works)

set.connect(view.getId(), ConstraintSet.START, ConstraintSet.PARENT_ID, ConstraintSet.START, MARGIN);

And, I also tried with ConstraintSet.setMargin, as in:

(Doesn't work)

set.setMargin(view.getId(), ConstraintSet.LEFT, MARGIN);

(Works)

set.setMargin(view.getId(), ConstraintSet.START, MARGIN);

Answer 1

you must use START and END

set.setMargin(view.getId(), ConstraintSet.START, MARGIN);