How to change Activity when clicking an item of my RecyclerView?

Issue

I have a RecyclerView that gets information from FirebaseFirestore, I need that when I click on an item I change the activity and add a putExtra. I try to call an Intent inside the Adapter of my RecyclerView but I get the error 'Function declaration must have a name' and 'Expecting member declaration'.

How can I change the Activity and add a putExtra by clicking on an Item in the RecyclerView?

this is MyAdapter

package com.example.atipicoapp

import android.content.Intent
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.AdapterView
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.view.menu.ActionMenuItemView
import androidx.core.content.ContextCompat.startActivity
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.list_item.view.*

class MyAdapter(private val platoList : ArrayList<Plato>,
                private val itemClickListener: OnPlatoClickListener
) : RecyclerView.Adapter<MyAdapter.MyViewHolder>() {

    interface OnPlatoClickListener{
        fun onItemClick(nombre: String)
    }


    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyAdapter.MyViewHolder {

        val itemView = LayoutInflater.from(parent.context).inflate(R.layout.list_item, parent, false)

        itemView.platoTouch.setOnClickListener(View.OnClickListener { v: View ->
            

        })

        return MyViewHolder(itemView)

    }

    override fun onBindViewHolder(holder: MyAdapter.MyViewHolder, position: Int) {

        val plato : Plato = platoList[position]
        holder.platoName.text = plato.platoName
        holder.platoDescription.text = plato.platoDescription
        holder.platoPrecio.text = plato.platoPrecio.toString()
        holder.platoCantidad.text = plato.platoCantidad.toString()

    }

    override fun getItemCount(): Int {

        return platoList.size

    }

    public class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView){


        val platoName : TextView = itemView.findViewById(R.id.platoNombre)
        val platoDescription : TextView = itemView.findViewById(R.id.platoDescripcion)
        val platoPrecio : TextView = itemView.findViewById(R.id.platoPrecio)

        val platoCantidad : TextView = itemView.findViewById(R.id.platoCant)
        
        platoCantidad.setOnClickListener(View.OnClickListener {
            val intent = Intent(itemView.getContext(),SlotActivity::class.java)itemView.getContext().startActivity(intent)})


    }
}

Solution

    override fun onBindViewHolder(holder: MyAdapter.MyViewHolder, position: Int) {
        when (holder) {
            is MyViewHolder -> {
                holder.bind(platoList[position])
            }
        }
    }

    class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

        val platoName : TextView = itemView.findViewById(R.id.platoNombre)
        val platoDescription : TextView = itemView.findViewById(R.id.platoDescripcion)
        val platoPrecio : TextView = itemView.findViewById(R.id.platoPrecio)

        val platoCantidad : TextView = itemView.findViewById(R.id.platoCant)

        private val mActivity = itemView.context as Activity
        private val intent = Intent(mActivity, SlotActivity::class.java)

        fun bind(plato: Plato) {
            platoName.text = plato.platoName
            platoDescription.text = plato.platoDescription
            platoPrecio.text = plato.platoPrecio.toString()
            platoCantidad.text = plato.platoCantidad.toString()

            platoCantidad.setOnClickListener {
                intent.putExtra("key", value)
                mActivity.startActivity(intent)
            }
        }
    }

Note: it is much better to use English in variable names and comments so that developers who read your code later can easily understand it.

Answered By - Dewerro