public class ItemView extends ConstraintLayout {
    LinearLayout linearButtons;
    LinearLayout linearText;
public ItemView(Context context, String name, String price, ArrayList<String> guests,
   ArrayList<String> checked, int id) {
...
    addView(linearText);
    addView(linearButtons);
    set.clone(this);
    set.connect(linearText.getId(), ConstraintSet.LEFT, this.getId(),
      ConstraintSet.LEFT, 8);
    set.connect(linearText.getId(), ConstraintSet.TOP, this.getId(),
     ConstraintSet.TOP, 8);
    set.connect(linearButtons.getId(), ConstraintSet.RIGHT, this.getId(),
     ConstraintSet.RIGHT, 8);
    set.connect(linearButtons.getId(), ConstraintSet.TOP, this.getId(),
     ConstraintSet.TOP, 8);
}

for (Item it:r.getItems()) {
        ItemView itemView = new ItemView(this, it.getName(), nf.format(it.getPrice()), dinerlist, it.getGuests(), i);
        ConstraintLayout.LayoutParams params = new ConstraintLayout.LayoutParams(ConstraintLayout.LayoutParams.MATCH_PARENT, ConstraintLayout.LayoutParams.MATCH_PARENT);
        itemView.setLayoutParams(params);
        vg.addV[enter image description here][1]iew(itemView);
        Log.d("ItemView Children: ", itemView.getWidth()+" "+itemView.getHeight());

//add the view with 0dp width and height
    val layoutParams = ConstraintLayout.LayoutParams(0, 0)
    val view = View(context)
    view.id = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) View.generateViewId() else 1138
    parent.addView(view)

    //apply the default width and height constraints in code
    val constraints = ConstraintSet()
    constraints.clone(parent)
    constraints.constrainDefaultHeight(view.id, ConstraintSet.MATCH_CONSTRAINT_SPREAD)
    constraints.constrainDefaultWidth(view.id, ConstraintSet.MATCH_CONSTRAINT_SPREAD)
    constraints.applyTo(parent)