How to Create a Quiz App In Android?

package org.geeksforgeeks.demo;

public class Question {
    // Resource ID for the question text (stored in strings.xml)
    private int answerResId;
    // Correct answer (true or false)
    private boolean isAnswerTrue;

    public Question(int answerResId, boolean isAnswerTrue) {
        this.answerResId = answerResId;
        this.isAnswerTrue = isAnswerTrue;
    }

    // Getter for answerResId
    public int getAnswerResId() {
        return answerResId;
    }

    // Setter for answerResId
    public void setAnswerResId(int answerResId) {
        this.answerResId = answerResId;
    }

    // Getter for isAnswerTrue
    public boolean isAnswerTrue() {
        return isAnswerTrue;
    }

    // Setter for isAnswerTrue
    public void setAnswerTrue(boolean answerTrue) {
        isAnswerTrue = answerTrue;
    }
}

package org.geeksforgeeks.demo;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    // UI components
    private Button falseButton;
    private Button trueButton;
    private ImageButton nextButton;
    private ImageButton prevButton;
    private TextView questionTextView;
    private TextView answerTextView;

    // Variable to track correct answers
    private int correct = 0;

    // Index to track the current question
    private int currentQuestionIndex = 0;

    // Array holding the questions and their correct answers
    private final Question[] questionBank = {
            new Question(R.string.a, true),
            new Question(R.string.b, false),
            new Question(R.string.c, true),
            new Question(R.string.d, false),
            new Question(R.string.e, false),
            new Question(R.string.f, true)
    };

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

        // Initializing UI elements
        falseButton = findViewById(R.id.false_button);
        trueButton = findViewById(R.id.true_button);
        nextButton = findViewById(R.id.next_button);
        prevButton = findViewById(R.id.prev_button);
        questionTextView = findViewById(R.id.question);
        answerTextView = findViewById(R.id.answer);

        // Hide the answer text initially
        answerTextView.setVisibility(View.INVISIBLE);

        // Load the first question
        updateQuestion();

        // Button click listeners
        falseButton.setOnClickListener(v -> checkAnswer(false));
        trueButton.setOnClickListener(v -> checkAnswer(true));

        nextButton.setOnClickListener(v -> {
            answerTextView.setVisibility(View.INVISIBLE);

            // Check if there are more questions
            if (currentQuestionIndex < 7) {
                currentQuestionIndex++;

                // If all questions are completed, display the score
                if (currentQuestionIndex == 6) {
                    nextButton.setVisibility(View.GONE);
                    prevButton.setVisibility(View.GONE);
                    trueButton.setVisibility(View.GONE);
                    falseButton.setVisibility(View.GONE);

                    questionTextView.setText("Your Score: " + correct + "/6");
                } else {
                    updateQuestion();
                }
            }
        });

        prevButton.setOnClickListener(v -> {
            answerTextView.setVisibility(View.INVISIBLE);

            // Prevent going back before the first question
            if (currentQuestionIndex > 0) {
                currentQuestionIndex = (currentQuestionIndex - 1) % questionBank.length;
                updateQuestion();
            }
        });
    }

    // Updates the displayed question
    private void updateQuestion() {
        questionTextView.setText(questionBank[currentQuestionIndex].getAnswerResId());
    }

    // Checks the user's answer and updates the UI
    private void checkAnswer(boolean userChooseCorrect) {
        boolean answerIsTrue = questionBank[currentQuestionIndex].isAnswerTrue();
        String message;

        if (userChooseCorrect == answerIsTrue) {
            message = "That's correct";
            correct++;
        } else {
            message = "That's incorrect";
        }

        // Display feedback message
        answerTextView.setVisibility(View.VISIBLE);
        answerTextView.setText(message);
    }
}