Toggleable Android RadioButton

gistfile1.java

import android.content.Context;
import android.util.AttributeSet;
import android.widget.RadioButton;
import android.widget.RadioGroup;

/** Extension of Android's RadioButton that restores CompoundButton's check toggling
 * behavior, allowing a checked RadioButton to be unchecked by tapping on it again. */
public class ToggleableRadioButton extends RadioButton {
	public ToggleableRadioButton(Context context) {
		super(context);
	}

	public ToggleableRadioButton(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public ToggleableRadioButton(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}


	@Override
	public void toggle() {
		if(isChecked()) {
			if(getParent() instanceof RadioGroup) {
				((RadioGroup)getParent()).clearCheck();
			}
		} else {
			setChecked(true);
		}
	}
}