MCQView in Android

MCQView in Android

public class MCQView extends View {

    private String questionText;
    private List answerChoices;
    private int selectedAnswer;

    private Paint questionPaint;
    private Paint answerPaint;
    private Rect questionRect;
    private List answerRects;

    public MCQView(Context context) {
        super(context);
        init();
    }

    public MCQView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public MCQView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        // Initialize instance variables and paint objects
        questionText = "";
        answerChoices = new ArrayList<>();
        selectedAnswer = -1;

        questionPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        questionPaint.setColor(Color.BLACK);
        questionPaint.setTextSize(40);

        answerPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        answerPaint.setColor(Color.BLACK);
        answerPaint.setTextSize(30);

        questionRect = new Rect();
        answerRects = new ArrayList<>();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // Calculate the desired size for your MCQ view
        int desiredWidth = 500;
        int desiredHeight = 300;
        setMeasuredDimension(desiredWidth, desiredHeight);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        // Draw the question text and answer choices on the canvas
        questionRect.set(0, 0, getWidth(), getHeight() / 2);
        canvas.drawText(questionText, questionRect.left + 20, questionRect.top + 50, questionPaint);

        answerRects.clear();
        int answerTop = getHeight() / 2 + 50;
        for (int i = 0; i < answerChoices.size(); i++) {
            String answerText = answerChoices.get(i);
            Rect answerRect = new Rect();
            answerRect.set(0, answerTop, getWidth(), answerTop + 80);
            answerRects.add(answerRect);
            canvas.drawText(answerText, answerRect.left + 20, answerRect.top + 50, answerPaint);

            if (i == selectedAnswer) {
                Paint selectedPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
                selectedPaint.setColor(Color.BLUE);
                canvas.drawRect(answerRect, selectedPaint);
            }

            answerTop += 100;
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // Handle touch events to allow the user to select an answer choice
        int action = event.getAction();
        switch (action) {
            case MotionEvent.ACTION_DOWN:
                float x = event.getX();
                float y = event.getY();
                for (int i = 0; i < answerRects.size(); i++) {
                    if (answerRects.get(i).contains((int) x, (int) y)) {
                        selectedAnswer = i;
                        invalidate();
                        return true;
                    }
                }
                break;
        }
        return super.onTouchEvent(event);
    }

    public void setQuestionText(String questionText) {
        this.questionText = questionText;
        invalidate();
    }

    public void setAnswerChoices(List answerChoices) {
        this.answerChoices = answerChoices;
        invalidate();
    }

    public void setSelectedAnswer(int selectedAnswer) {
        this.selectedAnswer = selectedAnswer;
        invalidate();
    }

    public String getQuestionText() {
        return questionText;
    }

    public List getAnswerChoices() {
        return answerChoices;
    }