Android Radio Group Tutorial

Learn how to write RadioGroup and Radio in xml file
In Java code use function to get which radio button been selected.

// sex.xml
<RadioGroup
	android:id="@+id/radioGroupSex"
	android:orientation="horizontal"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content">

	<RadioButton
		android:id="@+id/radioPatSex1"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:checked="true"
		android:text="@string/sex_val1" />

	<RadioButton
		android:id="@+id/radioPatSex2"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:text="@string/sex_val2" />
</RadioGroup>

// sex.java
public static int getRadioIndex(RadioGroup g)
{
	int radioButtonID = g.getCheckedRadioButtonId();
	View radioButton = g.findViewById(radioButtonID);
	int idx = g.indexOfChild(radioButton);
	Log.v("debug","idx="+idx);
	return idx;
}

RadioGroup gRadio = (RadioGroup) findViewById(R.id.radioGroup1);

int selected = getRadioIndex(gRadio);