Radiobutton in Android Quiz app

Question

I am working on quiz app for Android and I use RadioButtons in RadioGroup. I want to achieve that when someone checks the right answer (this case its id/krzyzyk) the score will increase by one point. I made this code:

int score = 2;

public void onRadioButtonClicked(View view) {
    RadioButton radiobutton1 = (RadioButton) findViewById(R.id.krzyzyk);

    if (radiobutton1.isChecked()) {
        score = score + 1;
    }
}

It works but when I run the app and click in another RadioButton and again id/krzyzyk the score will update again. Can you help me to fix this problem?

Answer 1

Your code will always increment the score when the user taps on the RadioButton krzyzyk.

I'll suggest you to Submit the answer and go to the next question incrementing the score if the selected RadioButton is correct.

Change your code to something like:

public void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();

    // Check which radio button was clicked
    switch(view.getId()) {
        case R.id.correct_answer: // this is id/krzyzyk
            if (checked)
                score++;
                // Go to next question
            break;
        case R.id.wrong_answer:
            if (checked)
                // Go to next question.
            break;
    }
}