View with minHeight in ConstraintLayout

Question

I have a ConstraintLayout inside a NestedScrollView. The ConstraintLayout contains a bunch of views but the last View can

Answer 1

Add this attribute to the view you'd like to have stretch:

app:layout_constraintHeight_default="spread"

I made a tiny app to demonstrate. No java logic to speak of, but here's the layout:

The bottom view stretches to fill the viewport when it is smaller than the remaining available space, and scrolling is impossible:

The bottom view maintains a fixed height when it is larger than the remaining available space, which makes scrolling possible: