To create a simple dialog for each items of a recycleView.

onItemClick.kt

override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
    if (holder is EmployeeViewHolder) { //EmployeeViewHolder is my custom viewHolder to bind values
        holder.bind(employees[position]) //employees is my list
        holder.itemView.setOnClickListener {
            val dialog = AlertDialog.Builder(it.context).create()
            dialog.setTitle("Title")//your title here
            dialog.setMessage("Message")//your message here
            dialog.setButton(
                AlertDialog.BUTTON_NEUTRAL, "OK" //a button labeled "OK"
            ) { _: DialogInterface, _: Int -> dialog.dismiss() }
            dialog.show()
        }
    }
}