Cara Membuat Checkbox Android Studio

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20sp"
        android:layout_centerHorizontal="true"
        android:text="@string/contoh_checkbox"
        android:textSize="25sp"
        android:textStyle="bold"/>

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView"
        android:layout_marginTop="20sp"
        android:layout_centerHorizontal="true"
        android:orientation="vertical">
        <CheckBox
            android:id="@+id/burger"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/burger"/>

        <CheckBox
            android:id="@+id/pizza"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/pizza"/>

        <CheckBox
            android:id="@+id/mie"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/mie_ayam"/>
    </LinearLayout>

    <Button
        android:id="@+id/btnHasil"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/linearLayout"
        android:layout_marginTop="10sp"
        android:layout_centerHorizontal="true"
        android:text="@string/hasil_checkbox"/>

</RelativeLayout>

package com.example.checkbox;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    CheckBox burger, pizza, mie;

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

        burger = (CheckBox)findViewById(R.id.burger);
        pizza = (CheckBox)findViewById(R.id.pizza);
        mie = (CheckBox)findViewById(R.id.mie);

        Button btnHasil = (Button)findViewById(R.id.btnHasil);
        btnHasil.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String hasil = "Saya Pesan";
                if(burger.isChecked())
                    hasil += "\n" + burger.getText().toString();
                if(pizza.isChecked())
                    hasil += "\n" + pizza.getText().toString();
                if(mie.isChecked())
                    hasil += "\n" + mie.getText().toString();

                Toast.makeText(getApplicationContext(),
                        hasil, Toast.LENGTH_SHORT).show();
            }
        });
    }
}