step2.dart

List _cities =
  ["Cluj-Napoca", "Bucuresti", "Timisoara", "Brasov", "Constanta"];

  List<DropdownMenuItem<String>> _dropDownMenuItems;
  String _currentCity;

  @override
  void initState() {
    _dropDownMenuItems = getDropDownMenuItems();
    _currentCity = _dropDownMenuItems[0].value;
    super.initState();
  }
  // here we are creating the list needed for the DropDownButton
  List<DropdownMenuItem<String>> getDropDownMenuItems() {
    List<DropdownMenuItem<String>> items = new List();
    for (String city in _cities) {
      // here we are creating the drop down menu items, you can customize the item right here
      // but I'll just use a simple text for this
      items.add(new DropdownMenuItem(
          value: city,
          child: new Text(city)
      ));
    }
    return items;
  }