【Java】How to create a context menu 3

MainActivity.java

package com.example.contextmenusample;

import androidx.annotation.NonNull;
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;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

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

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        getMenuInflater().inflate(R.menu.context_menu, menu);
    }

    @Override
    public boolean onContextItemSelected(@NonNull MenuItem item) {
//        switch (item.getItemId()) {
//            R.id.action_home ->
//            R.id.action_user ->
//            R.id.action_map ->
//        }

        String message = "「" + item.getTitle() + "」が押されました。";
        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
        return true;
    }
}