Remove Item from List not working in Java

Question

i have a List which contains a few Strings from the strings.xml.

A random number determines which text from the List will be shown. Then this text should be removed from the list.

Unfortunalely, the List.remove(index) ist not working for me.

What am I doing wrong?

strings.xml

<resources>
    <string name="app_name">ReadQuestions</string>
    <string-array name="questions">
        <item>Text 1</item>
        <item>Text 2</item>
        <item>Text 3</item>
        <item>Text 4</item>
        <item>Text 5</item>
    </string-array>
</resources>

MainActivity

public class MainActivity extends AppCompatActivity{

    List<String> questions;

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


questions = Arrays.asList(getResources().getStringArray(R.array.questions));
setNewText();
}

public void setNewText(){
        int rnd = new Random().nextInt(questions.size());
        textViewBehind.setText(questions.get(rnd));

        questions.remove(rnd);   // Not working
        Toast.makeText(this, "test", Toast.LENGTH_SHORT).show(); // Doesn't pop up somehow

    }

Has anybody an ideo why the remove method isn't working and why everything after that method isn't processed. It feels like there is some return statement in the remove method. Im new to Java, but even if the onCreate method is just called once, could it be possible the questions = Arrays.asList(getResources().getStringArray(R.array.questions)); is called every cycle and fills the List again?

Best regards

`Arrays.asList` creates an *immutable* list, meaning you can't change it. I would suggest you use an `ArrayList` instead. — Nicolas, Apr 14 '20 at 17:26
What do you mean *its not working*? What is happening? Is there an error/exception? — Jason, Apr 14 '20 at 17:26
How can I use an ArrayList with getResources.getStringArray, Nicolas? — andyyy, Apr 14 '20 at 17:31
@andyyy https://stackoverflow.com/questions/157944/create-arraylist-from-array — Sotirios Delimanolis, Apr 14 '20 at 17:42
do like ArrayList questions=new ArrayList(Arrays.asList(getResources().getStringArray(R.array.questions))); — Vishal Nagvadiya, Apr 17 '20 at 14:06

Remove Item from List not working in Java

0 Answers0