Margin Item Decoration (Simple)

MarginItemDecoration.kt

class MarginItemDecoration(private val spaceSize: Int) : RecyclerView.ItemDecoration() {
    override fun getItemOffsets(
        outRect: Rect, view: View,
        parent: RecyclerView, 
        state: RecyclerView.State
    ) {
        with(outRect) {
            if (parent.getChildAdapterPosition(view) == 0) {
                top = spaceSize
            }
            left = spaceSize
            right = spaceSize
            bottom = spaceSize
        }
    }
}