Setup Equal Spacing of Grid Layout of RecyclerView

kotlin

class SpacesItemDecoration ():  RecyclerView.ItemDecoration() {



    override fun getItemOffsets(
        outRect: Rect, view: View, parent: RecyclerView,
        state: RecyclerView.State
    ) {

        val requiredSpacing = 32
        val position = parent.getChildViewHolder(view).adapterPosition
        val itemCount = state.itemCount
        val layoutManager = parent.layoutManager
        if (layoutManager is GridLayoutManager) {
            val gridLayoutManager = layoutManager
            val cols = gridLayoutManager.spanCount
            if(position % cols == 0 ) { //left most item
                outRect.left = 0
                outRect.top = requiredSpacing  / 2
                outRect.bottom = requiredSpacing  / 2
                outRect.right =  requiredSpacing  / 2
            }else if(position % cols == cols -1 ) {
                outRect.left = requiredSpacing  / 2
                outRect.top = requiredSpacing  / 2
                outRect.bottom = requiredSpacing  / 2
                outRect.right =  0
            }else{
                outRect.left = requiredSpacing  / 2
                outRect.top = requiredSpacing  / 2
                outRect.bottom = requiredSpacing  / 2
                outRect.right =  requiredSpacing  / 2
            }
        }
    }
}