I created an activity which has a button, when clicked, shows a dialog box. This dialog box has two buttons, “Confirm” and “Cancel”. When I press cancel, I want to add data to a list and show the list:

class GrillDetailedActivity : AppCompatActivity() {
    private val comenziList = mutableListOf<String>()

    @SuppressLint("MissingInflatedId")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_grill_detailed)

        val imagine: ImageView = findViewById(R.id.detailedImageView)
        val nume: TextView = findViewById(R.id.detailedNume)
        val cantitate: TextView = findViewById(R.id.detailedCantitate)
        val pret: TextView = findViewById(R.id.detailedPret)

        val bundle: Bundle? = intent.extras
        val imageId = bundle?.getInt("imageId")
        val grillName = bundle!!.getString("grillName")
        val cantitateGrill = bundle!!.getString("cantitateGrill")
        val pretGrill = bundle!!.getString("pretGrill")

        imagine.setImageResource(imageId!!)
        nume.text = grillName
        cantitate.text = cantitateGrill
        pret.text = pretGrill

        val comandaBtn: Button = findViewById(R.id.buttonComanda)
        comandaBtn.setOnClickListener {
            val message: String? = "Doriti sa finalizati comanda?"
            showCustomDialogBox(message)
        }
    }

    private fun showCustomDialogBox(grillName: String?) {
        val dialog = Dialog(this)
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
        dialog.setCancelable(false)
        dialog.setContentView(R.layout.comanda_dialog_box)
        dialog.window?.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))

        val tvMessage: TextView = dialog.findViewById(R.id.tvMessage)
        val btnConfirm: Button = dialog.findViewById(R.id.btnConfirm)
        val btnAnuleaza: Button = dialog.findViewById(R.id.btnAnuleaza)

        val message: String? = "Doriti sa finalizati comanda pentru $grillName?"

        tvMessage.text = message

        btnConfirm.setOnClickListener {
            Toast.makeText(this, "Ati comandat produsul", Toast.LENGTH_SHORT).show()
        }

        btnAnuleaza.setOnClickListener {
            dialog.dismiss()
        }
        dialog.show()
    }
}