PersonFirestoreAdapter.kt

class PersonFirestoredapter(private val context: Context, 
                            private val people: List<Person>) :
                            RecyclerView.Adapter<PersonFirestoredapter.Holder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): Holder {
        val layoutInflater = LayoutInflater.from(context)
        val view = layoutInflater.inflate(R.layout.layout_list_subscribers,
            parent, false)
        return Holder(view, people, context)
    }

    override fun getItemCount(): Int {return people.count()}

    override fun onBindViewHolder(holder: Holder, position: Int) {
        holder.name.text = people[position].name
        holder.email.text = people[position].email
        holder.phone.text = people[position].phone
    }

    class Holder(itemView: View) : RecyclerView.ViewHolder(itemView){
    
        val name: TextView = itemView.findViewById(R.id.list_name)
        val email: TextView = itemView.findViewById(R.id.list_email)
        val phone: TextView = itemView.findViewById(R.id.list_phone)

      }
}