Is it possible to have the last item in a RecyclerView to be docked to the bottom if there is no need to scroll?

Question

I\'m building a shopping cart RecyclerView that displays all the items in the cart in a RecyclerView, as well as it has an additional view at the bottom that summarizes the cart

Answer 1

Building upon Lamorak's answer I've rewritten the code in Kotlin and altered it to accommodate for RecyclerView paddings and item margins:

class LastSticksToBottomItemDecoration: RecyclerView.ItemDecoration() {

    override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
        parent.adapter?.itemCount?.let { childCount ->
            if (parent.getChildLayoutPosition(view) != childCount - 1) return
            val lastViewBottom = when (childCount) {
                1 -> 0
                else -> parent.layoutManager?.findViewByPosition(childCount - 2)?.let {
                    calculateViewBottom(it, parent)
                } ?: 0
            }
            view.measure(parent.width, parent.height)
            max(
                0,
                parent.height -
                        parent.paddingTop -
                        parent.paddingBottom -
                        lastViewBottom -
                        view.measuredHeight -
                        view.marginTop -
                        view.marginBottom
            ).let { topOffset ->
                outRect.set(0, topOffset, 0, 0)
            }
        }
    }

    private fun calculateViewBottom(view: View, parent: RecyclerView): Int =
        (view.layoutParams as ViewGroup.MarginLayoutParams).let {
            view.measure(parent.width, parent.height)
            view.y.toInt() + view.measuredHeight + it.topMargin + it.bottomMargin
        }
}