GridLayoutManager used in RecyclerView , then use this Item Decoration for spacing

GridSpacingItemDecoration.kt

class GridSpacingItemDecoration(
    private val spanCount: Int,
    private val spacing: Int,
    private val includeEdges: Boolean
) : RecyclerView.ItemDecoration() {

    override fun getItemOffsets(
        outRect: Rect,
        view: View,
        parent: RecyclerView,
        state: RecyclerView.State
    ) {
        val position: Int = parent.getChildAdapterPosition(view)
        val column = position % spanCount

        if (includeEdges) {
            outRect.left = spacing - column * spacing / spanCount
            outRect.right = (column + 1) * spacing / spanCount
            if (position < spanCount) {
                outRect.top = spacing
            }
            outRect.bottom = spacing
        } else {
            outRect.left = column * spacing / spanCount
            outRect.right = spacing - (column + 1) * spacing / spanCount
            if (position >= spanCount) {
                outRect.top = spacing
            }
        }
    }
}