Removing/Adding constraint programmatically in ConstraintLayout

Question

I want to remove and add constraint programmatically based on some condition. Here are the screenshots:

and I want to remove it like this but in code:

Answer 1

another way this can be done without ConstraintSet.clear is like this with ConstraintLayout.LayoutParams.UNSET

Assuming we want to remove the bottom constraint of our constraintLayout itself but can be any view:

val containerParams = cl_container.layoutParams as ConstraintLayout.LayoutParams
containerParams.bottomToBottom = ConstraintLayout.LayoutParams.UNSET
cl_container.layoutParams = containerParams

Answer 2

I have not worked through your code, but the following illustrates how to break and make the constraint using ConstraintSet.

    ConstraintSet set = new ConstraintSet();
    ConstraintLayout layout;

    layout = (ConstraintLayout) findViewById(R.id.layout);
    set.clone(layout);
    // The following breaks the connection.
    set.clear(R.id.bottomText, ConstraintSet.TOP);
    // Comment out line above and uncomment line below to make the connection.
    // set.connect(R.id.bottomText, ConstraintSet.TOP, R.id.imageView, ConstraintSet.BOTTOM, 0);
    set.applyTo(layout);

Answer 3

Here is the Java version of the answer from j2emanue using ConstraintLayout.LayoutParams, which works without specifying the id of the element that the layout is contrained to:

final ConstraintLayout constraintLayout = findViewById(R.id.constraintLayout);
final ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) constraintLayout.getLayoutParams();
layoutParams.bottomToBottom = ConstraintLayout.LayoutParams.UNSET;
constraintLayout.setLayoutParams(layoutParams);