Java tutorial
//package com.java2s; import android.view.View; import android.widget.RadioButton; import android.widget.RadioGroup; import java.util.ArrayList; import java.util.List; public class Main { public static List<RadioButton> getRadioButtons(RadioGroup radioGroup) { final ArrayList<RadioButton> out = new ArrayList<>(radioGroup.getChildCount()); for (int i = 0; i < radioGroup.getChildCount(); i++) { final View v = radioGroup.getChildAt(i); if (v instanceof RadioButton) { out.add((RadioButton) v); } } return out; } }