I want to add radiobutton programatically and set first item being selected?

Question

Here is my code which I created bunch of radio buttons from my Json.

for (int i = 0; i < level_array_list.size(); i++) {
    RadioButton radioButton = new RadioButton(getActivity());
    radioButton.setText(level_array_list.get(i).getLevelName());
    radioButton.setId(Integer.parseInt(level_array_list.get(i).getLevel_id()));
    radioGrp.addView(radioButton);
}

Please help. Thanks in advance!

Answer 1

i want to be selected first item which is loaded from json array ?

You need to use radioButton.setChecked(true); inside loop when i = 0 (means first radio button)

Try this

 for (int i = 0; i < level_array_list.size(); i++) {
            RadioButton radioButton = new RadioButton(getActivity());
            radioButton.setText(level_array_list.get(i).getLevelName());
            radioButton.setId(Integer.parseInt(level_array_list.get(i).getLevel_id()));
            if(i==0){
                radioButton.setChecked(true);
            }
            radioGrp.addView(radioButton);
        }

Answer 2

Try this code. This will checked the first item. Hope it helps!

ArrayList<RadioButton> radioButtonsList = new ArrayList<>();

    for (int i = 0; i < level_array_list.size(); i++) {
        RadioButton radioButton = new RadioButton(getActivity());
        radioButton.setText(level_array_list.get(i).getLevelName());
        radioButton.setId(Integer.parseInt(level_array_list.get(i).getLevel_id()));
        radioButtonsList.add(radioButton);
        radioGrp.addView(radioButton);
    }

RadioButton radioButton = radioButtonsList.get(0);
radioButton.setChecked(true);