MyAdapter.kt

class MyAdapter(val mDataset: Array<String>,
                val itemClickListener: (String) -> Unit,
                val itemClickButtonListener: (String) -> Unit) :
        RecyclerView.Adapter<MyAdapter.ViewHolder>() {
          
   ...

    class ViewHolder(var mView: View) : RecyclerView.ViewHolder(mView) {
        fun bind(item: String,
                 itemClickListener: (String) -> Unit,
                 itemClickButtonListener: (String) -> Unit) = with(itemView) {
            itemView.button_ok.setOnClickListener { itemClickButtonListener(item) }
            setOnClickListener { itemClickListener(item) }
        }
    }
}