TextDropdownFormField( options: ["Male", "Female"], decoration: InputDecoration( border: OutlineInputBorder(), suffixIcon: Icon(Icons.arrow_drop_down), labelText: "Gender"), dropdownHeight: 120, ), 

dropdown_plus: <lastest version> 

 final List<Map<String, dynamic>> _roles = [ {"name": "Super Admin", "desc": "Having full access rights", "role": 1}, { "name": "Admin", "desc": "Having full access rights of a Organization", "role": 2 }, { "name": "Manager", "desc": "Having Magenent access rights of a Organization", "role": 3 }, { "name": "Technician", "desc": "Having Technician Support access rights", "role": 4 }, { "name": "Customer Support", "desc": "Having Customer Support access rights", "role": 5 }, {"name": "User", "desc": "Having End User access rights", "role": 6}, ]; // ... // ... DropdownFormField<Map<String, dynamic>>( onEmptyActionPressed: () async {}, decoration: InputDecoration( border: OutlineInputBorder(), suffixIcon: Icon(Icons.arrow_drop_down), labelText: "Access"), onSaved: (dynamic str) {}, onChanged: (dynamic str) {}, validator: (dynamic str) {}, displayItemFn: (dynamic item) => Text( item['name'] ?? '', style: TextStyle(fontSize: 16), ), findFn: (dynamic str) async => _roles, filterFn: (dynamic item, str) => item['name'].toLowerCase().indexOf(str.toLowerCase()) >= 0, dropdownItemFn: (dynamic item, position, focused, dynamic lastSelectedItem, onTap) => ListTile( title: Text(item['name']), subtitle: Text( item['desc'] ?? '', ), tileColor: focused ? Color.fromARGB(20, 0, 0, 0) : Colors.transparent, onTap: onTap, ), ), 

final bool autoFocus; final bool Function(dynamic item, String str)? filterFn; final bool Function(dynamic item1, dynamic item2)? selectedFn; final Future<List<dynamic>> Function(String str) findFn; final ListTile Function( dynamic item, int position, bool focused, bool selected, Function() onTap, ) dropdownItemFn; final Widget Function(dynamic item) displayItemFn; final InputDecoration? decoration; final Color? dropdownColor; final DropdownEditingController<T>? controller; final void Function(dynamic item)? onChanged; final void Function(dynamic)? onSaved; final String? Function(T?)? validator; final double? dropdownHeight; final TextStyle? searchTextStyle; final String emptyText; final String emptyActionText; final Future<void> Function()? onEmptyActionPressed;