ChildItemsAdapter.kt

class ChildItemsAdapter(private val data: ArrayList<ChildItemModel>,
                        private var itemListener: ItemListener
) : RecyclerView.Adapter<ChildItemsViewHolder>(), ItemListener {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ChildItemsViewHolder {
        val inflater = LayoutInflater.from(parent.context)
        return ChildItemsViewHolder(inflater, parent, this)
    }

    override fun onBindViewHolder(holder: ChildItemsViewHolder, position: Int) {
        val card: ChildItemModel = data[position]
        holder.bind(card)
    }

    override fun getItemCount() = data.size

    // We dont want this here but we trap if for the onRemoveCard below
    // Use the calling class listener
    override fun onViewCard(position: Int) {
        itemListener?.onViewCard(position)
    }

    override fun onRemoveCard(position: Int) {
        data.removeAt(position)
        notifyDataSetChanged()
        itemListener?.onRemoveCard(position)
    }
}