Check out example codes for "android iterate through radio group java". It will help you in understanding the concepts better.

Code Example 1

int count = radioGroup.getChildCount();
ArrayList<RadioButton> listOfRadioButtons = new ArrayList<RadioButton>();
for (int i=0;i<count;i++) {
  View o = radioGroup.getChildAt(i);
  if (o instanceof RadioButton) {
    listOfRadioButtons.add((RadioButton)o);
  }
}
Log.d(TAG,"you have "+listOfRadioButtons.size()+" radio buttons");

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