SpacingItemDecoration.kt

import android.graphics.Rect
import android.view.View

import androidx.recyclerview.widget.RecyclerView

class SpacingItemDecoration(
    private val space: Int,
    private val orientation: Int
) : RecyclerView.ItemDecoration() {

    override fun getItemOffsets(
        outRect: Rect,
        view: View,
        parent: RecyclerView,
        state: RecyclerView.State
    ) {
        if (orientation == RecyclerView.VERTICAL) {
            outRect.bottom = space

            // Add top margin only for the first item to avoid double space between items
            if (parent.getChildAdapterPosition(view) == 0) {
                outRect.top = space
            }
        } else {
            outRect.right = space

            // Add top margin only for the first item to avoid double space between items
            if (parent.getChildAdapterPosition(view) == 0) {
                outRect.left = space
            }
        }
    }
}