How to set text color of a radio button when a button is pressed in Android?

I have 5 radio groups with 4 radio buttons each. Every radio button represents an answer to a question. I want when someone press the button, if the correct answer is checked, to set the color of the that text in green. With this code, when i press the button, nothing happens. Any ideas? Here is my code:

boolean isChecked;
int CorrectAnswer;
RadioButton checkedRadioButton;

    answer[j].setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        RadioButton checkedRadioButton = ((RadioButton) v);
        int CorrectAnswer = Integer.parseInt(checkedRadioButton.getTag().toString());
        isChecked = true;
        if (isChecked) {
            if (checkedRadioButton.isChecked() & CorrectAnswer == 1) {
                score++;
                isChecked = false;
            }
        }
    }

    finishButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            for (int i = 0; i < radioGroup.length; i++) {
                for (int j = 0; j < answer.length; j++) {
                radioGroup[i].getChildAt(j).setEnabled(false);
                    if (CorrectAnswer == 1) {
                        checkedRadioButton.setTextColor(Color.GREEN);
                    }
                }
            }
        }
    });

Thanks!