【Kotlin】How to create a context menu 3

MainActivity.kt

package com.example.contextmenusample

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.ContextMenu
import android.view.MenuItem
import android.view.View
import android.widget.Toast

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        registerForContextMenu(findViewById(R.id.rootLayout))
    }

    override fun onCreateContextMenu(
        menu: ContextMenu?,
        v: View?,
        menuInfo: ContextMenu.ContextMenuInfo?
    ) {
        super.onCreateContextMenu(menu, v, menuInfo)
        menuInflater.inflate(R.menu.context_menu, menu)
    }

    override fun onContextItemSelected(item: MenuItem): Boolean {
//         when (item.itemId) {
//            R.id.action_home ->
//            R.id.action_user ->
//            R.id.action_map ->
//        }

        Toast.makeText(this, "「${item.title}」が押されました。", Toast.LENGTH_SHORT).show()
        return true
    }
}