@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // TODO: replace with a real list adapter.

        ArrayList<Todo> todos = new ArrayList<Todo>();
        todos.add(new Todo("title1", Todo.Priority.LOW, "2011. 09. 26.", "description1"));
        todos.add(new Todo("title2", Todo.Priority.MEDIUM, "2011. 09. 27.", "description2"));
        todos.add(new Todo("title3", Todo.Priority.HIGH, "2011. 09. 28.", "description3"));
        TodoAdapter todoAdapter = new TodoAdapter(getActivity().getApplicationContext(), todos);
        setListAdapter(todoAdapter);
        setHasOptionsMenu(true);
}

@Override
public void onTodoCreated(Todo newTodo) {
  TodoAdapter adapter = (TodoAdapter)getListAdapter();
  adapter.addItem(newTodo);
  adapter.notifyDataSetChanged();
}