RadioButtonGroup.java

// Radio Button Group - Gender
RadioGroup rgGender = (RadioGroup) findViewById(R.id.radioGroup1);
RadioButton rbMale = (RadioButton) findViewById(R.id.radio0);
RadioButton rbFemale = (RadioButton) findViewById(R.id.radio1);
rgGender.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
					
	@Override
	public void onCheckedChanged(RadioGroup group, int checkedId) {
	// TODO Auto-generated method stub
	if (checkedId == R.id.radio0) {
		Toast.makeText(getApplicationContext(),
 	   "Male isChecked", Toast.LENGTH_SHORT).show();
		} else if (checkedId == R.id.radio1) {
		Toast.makeText(getApplicationContext(),
	   "Female isChecked", Toast.LENGTH_SHORT).show();
		}
	}
});