Не знаю, где разместить код CheckBox в MainActivity.java

Я работаю над приложением викторины и столкнулся с основной проблемой: я хочу установить флажок, где, если оба ответа верны, оценка должна обновляться, я не знаю, где разместить код в java.

В основном так и должно работать приложение: всего вопросов 5, каждый из которых имеет 2 отметки, три MCQ, в которых один правильный, 4-й вопрос, оба ответа верны, поэтому мы добавляем флажок, каждый флажок имеет одну отметку, затем поле editText, чтобы Пользователь может добавлять свои собственные комментарии, после того как пользователь ответит на все вопросы, и только тогда, после нажатия на кнопку «Отправить», пользователю должен быть представлен рейтинг!
Спасибо

I want to know how to simply use check box to update score

Файл MainActivity.java здесь

package com.example.android.quizatlast;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    int Totalscore = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //toasts , onclick , and distroying buttons for next time


        final Button buttononeone = (Button) findViewById(R.id.Button1_1);
        final Button buttononetwo = (Button) findViewById(R.id.Button1_2);

        buttononeone.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int score = 2;
                Totalscore = Totalscore + score;
                Score(Totalscore);
                buttononeone.setEnabled(false);
                buttononetwo.setEnabled(false);

            }
        });
        buttononetwo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Context context = getApplicationContext();
                CharSequence text = "Ahh,Wait for the score";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();

                buttononetwo.setEnabled(false);
                buttononeone.setEnabled(false);
            }
        });

        final Button buttontwoone = (Button) findViewById(R.id.Button2_1);
        final Button buttontwotwo = (Button) findViewById(R.id.Button2_2);

        buttontwoone.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Context context = getApplicationContext();
                CharSequence text = "Dehli,City you should must visit";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
                buttontwoone.setEnabled(false);
                buttontwotwo.setEnabled(false);

            }
        });

        buttontwotwo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int score = 2;

                Totalscore = Totalscore + score;
                Score(Totalscore);

                Context context = getApplicationContext();
                CharSequence text = "Ahh,mumbai is  a beautiful place";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
                buttontwotwo.setEnabled(false);
                buttontwoone.setEnabled(false);

            }
        });

        final Button buttonthreeone = (Button) findViewById(R.id.Button3_1);
        final Button buttonthreetwo = (Button) findViewById(R.id.Button3_2);
        buttonthreeone.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int score = 2;

                Totalscore = Totalscore + score;
                Score(Totalscore);
                Context context = getApplicationContext();
                CharSequence text = "Agra , wonders are waiting there for you";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
                buttonthreeone.setEnabled(false);
                buttonthreetwo.setEnabled(false);
            }
        });

                //PROBLEM HERE

        CheckBox checkBoxfourone = (CheckBox) findViewById(R.id.Checkbox4_1);
        boolean check4_1 = checkBoxfourone.isChecked();
        CheckBox checkBoxfourtwo = (CheckBox) findViewById(R.id.Checkbox4_2);
        boolean check4_2 = checkBoxfourtwo.isChecked();
        Score(Totalscore);
    }

    private int checkscore(boolean check4_1,boolean check4_2) {
        int score = Totalscore;
        if (check4_1) {
            Totalscore = Totalscore + 1;
        }
        if (check4_2) {
            Totalscore = Totalscore + 1;
        }
        return Totalscore;
    }

                //TILL HERE
    public void Score(int score) {

        TextView scoreView = (TextView) findViewById(R.id.score);
        scoreView.setText(String.valueOf(score));
    }public void reset(View view){
        Score(Totalscore = 0);
    }
}

activity_main.xml

    <?xml version = "1.0" encoding = "utf-8"?>
<ScrollView
    android:layout_width = "match_parent"
    android:layout_height = "match_parent"
    xmlns:android = "http://schemas.android.com/apk/res/android"
    xmlns:app = "http://schemas.android.com/apk/res-auto">

<LinearLayout
    xmlns:tools = "http://schemas.android.com/tools"
    android:layout_width = "match_parent"
    android:layout_height = "match_parent"
    android:layout_margin = "8dp"
    android:orientation = "vertical"
    tools:context = "com.example.android.justjava.MainActivity">

        <LinearLayout
            android:id = "@+id/topping"
            android:layout_width = "wrap_content"
            android:layout_height = "wrap_content"
            android:orientation = "vertical">
            <EditText
                android:id = "@+id/Name_view"
                android:layout_width = "match_parent"
                android:layout_height = "wrap_content"
                android:hint = "Name"
                android:inputType = "textCapCharacters" />
            <EditText
                android:id = "@+id/Email_view"
                android:layout_width = "match_parent"
                android:layout_height = "wrap_content"
                android:hint = "Email"
                android:inputType = "textCapCharacters" />
            <TextView
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:layout_marginBottom = "8dp"
                android:text = "Toppings"
                android:textSize = "16sp"
                android:textAllCaps = "true"/>
            <CheckBox
                android:id = "@+id/checkbox"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:text = "Whipped Cream"
                android:paddingLeft = "24dp"
                android:textSize = "16sp"
                android:layout_marginBottom = "8dp"/>
            <CheckBox
                android:id = "@+id/chocolate_checkbox"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:text = "Chocolate"
                android:paddingLeft = "24dp"
                android:textSize = "16sp"
                android:layout_marginBottom = "8dp"/>
        </LinearLayout>
        <TextView
            android:id = "@+id/text_view"
            android:layout_below = "@id/topping"
            android:layout_width = "wrap_content"
            android:layout_height = "wrap_content"
            android:layout_marginBottom = "8dp"
            android:text = "quantity!"
            android:textAllCaps = "true"
            android:textSize = "16sp" />
        <LinearLayout
            android:id = "@+id/linear"
            android:layout_below = "@id/text_view"
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content"
            android:orientation = "horizontal"
            >   <Button
            android:onClick = "decrement"        android:id = "@+id/decrement"
            android:layout_below = "@id/quantity_text_view"
            android:layout_width = "48dp"
            android:layout_height = "48dp"
            android:text = "-"
            android:layout_marginBottom = "8dp"/>


            <TextView
                android:layout_marginLeft = "8dp"
                android:id = "@+id/quantity_text_view"
                android:layout_width = "wrap_content"
                android:layout_height = "wrap_content"
                android:layout_marginBottom = "8dp"
                android:layout_below = "@id/increment"
                android:text = "0"
                android:textColor = "#000"
                android:layout_marginRight = "8dp"
                android:textSize = "24sp" />
            <Button
                android:onClick = "increment"
                android:id = "@+id/increment"
                android:layout_below = "@id/text_view"
                android:layout_width = "48dp"
                android:layout_height = "48dp"
                android:text = "+"
                android:layout_marginBottom = "8dp"/>

        </LinearLayout>

        <TextView
            android:id = "@+id/order_summary"
            android:layout_width = "wrap_content"
            android:layout_height = "wrap_content"
            android:layout_below = "@id/linear"
            android:layout_marginBottom = "8dp"
            android:text = "order summary"
            android:textAllCaps = "true"
            android:textSize = "16sp" />

        <TextView
            android:id = "@+id/order_summary_text_view"
            android:layout_width = "wrap_content"
            android:layout_height = "wrap_content"
            android:layout_below = "@id/order_summary"
            android:layout_marginBottom = "8dp"
            android:textSize = "24sp" />

        <Button
            android:layout_width = "wrap_content"
            android:layout_height = "wrap_content"
            android:layout_below = "@id/order_summary_text_view"
            android:onClick = "submitOrder"
            android:text = "order" />


    </LinearLayout>
</ScrollView>