What is the translation to java code of the following XML instructions used in a layout definition with a constraint layout?
app:layout_constraintBottom_toBottom
Here is an example of adding constraints programatically,
ConstraintLayout mConstraintLayout = (ConstraintLayout)fndViewById(R.id.mainConstraint);
ConstraintSet set = new ConstraintSet();
ImageView view = new ImageView(this);
mConstraintLayout.addView(view,0);
set.clone(mConstraintLayout);
set.connect(view.getId(), ConstraintSet.TOP, mConstraintLayout.getId(), ConstraintSet.TOP, 60);
set.applyTo(mConstraintLayout);
To know more details you can refer Constraint layout