How to know if your Android device has physical menu key.

MenuKey

public boolean hasPhysicalMenyKey(Context context) {
	if (VERSION.SDK_INT <= VERSION_CODES.GINGERBREAD_MR1) {
		return true;
	} else if (VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB && VERSION.SDK_INT <= VERSION_CODES.HONEYCOMB_MR2) {
		return false;
	} else {
		return ViewConfiguration.get(context).hasPermanentMenuKey();
	}
}