How to create dialog series list basic - kotlin

MyDialogFragment.kt

package com.example.sample

import android.app.Dialog
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.fragment.app.DialogFragment

class MyDialogFragment : DialogFragment() {

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {

        val choices = arrayOf("りんご", "ばなな", "みかん", "ぶどう", "いちご")

        val dialog = activity?.let {
            AlertDialog.Builder(it)
                .setTitle("好きな果物は？")
                .setItems(choices) { dialog, i ->
                    Toast.makeText(
                        it, "「${choices[i]}」を選択しました。",　Toast.LENGTH_SHORT
                    ).show()
                }
                .create()
        }

        return dialog ?: throw IllegalStateException("アクティビティがNullです。")
    }
}