How to Arrange RadioButtons Randomly in android?

Question

I have a radioGroup and four radiobutton, I just Want to arrange these radiobuttons randomly whenever the program is running.

Say i have radio buttons r1,r2,r3,r4 and a radiogroup. I want sometimes these radiobuttons arranged like r2,r3,r1,r4 (vertically) and some times r1,r2,r4,r3 and so on...

How can i Implement this?

Answer 1

For implementing random RadioButton random sequence following code will help you:

In your layout.xml file add RadioGroup:

 <RadioGroup
        android:id="@+id/gul_radio_group"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

And in your java file:

final int NUMBER_OF_RADIOBUTTONS_TO_ADD = 4;//Change it for other number of RadioButtons
    RadioButton[] radioButton;
    RadioGroup radioGroup;


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

        radioGroup = (RadioGroup) findViewById(R.id.gul_radio_group);

        //Initializing the RadioButtons
        radioButton = new RadioButton[NUMBER_OF_RADIOBUTTONS_TO_ADD];
        for (int i = 0; i < NUMBER_OF_RADIOBUTTONS_TO_ADD; i++) {
            radioButton[i] = new RadioButton(this);

            //Text can be loaded here
            radioButton[i].setText("Button " + (i + 1));
        }

        //Random Swapping
        for (int i = 0; i < 4; i++) {//this loop is randomly changing values 4 times
            int swap_ind1 = ((int) (Math.random() * 10) % NUMBER_OF_RADIOBUTTONS_TO_ADD);
            int swap_ind2 = ((int) (Math.random() * 10) % NUMBER_OF_RADIOBUTTONS_TO_ADD);
            RadioButton temp = radioButton[swap_ind1];
            radioButton[swap_ind1] = radioButton[swap_ind2];
            radioButton[swap_ind2] = temp;
        }
        radioButton[0].setChecked(true);//This will make the top RadioButton selected by default


        //Adding RadioButtons in RadioGroup
        for (int i = 0; i < NUMBER_OF_RADIOBUTTONS_TO_ADD; i++) {
            radioGroup.addView(radioButton[i]);
        }
    }