private void loadData(Bundle savedInstanceState) {
Elements data;
if (savedInstanceState != null
&& (data = (Elements) savedInstanceState.getSerializable(DATA)) != null) {
adapter.setData(data);
} else {
refresh();
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putSerializable(DATA, adapter.getData());
}