Can't Select Country nor State

[caqlayan]

Hi. I tried to use that tool but it gave error on picking screen. my code is:

                        layout: Layout.horizontal,
                        flagState: CountryFlag.ENABLE,
                        showStates: true,
                        showCities: true,
                        dropdownDecoration: kBoxDecorationStyle,
                          disabledDropdownDecoration: kBoxDecorationStyle,
                          onCountryChanged: (value) {
                          setState(() {
                            countryValue = value;
                          });
                          },
                        onStateChanged: (value) {
                          setState(() {
                            stateValue = value!;
                          });
                        },
                        onCityChanged: (value) {
                          setState(() {
                            cityValue = value!;
                          });
                        },
                        selectedItemStyle: TextStyle(fontWeight: FontWeight.bold, color: Colors.black),
                        dropdownDialogRadius: 15.0,
                        searchBarRadius: 15.0,
                        dropdownItemStyle: TextStyle(fontWeight: FontWeight.bold, color: Colors.black),
                      ),

The error is: 
```I/flutter ( 8694): countryChanged 🇦🇱    Albania null
E/flutter ( 8694): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: Null check operator used on a null value
E/flutter ( 8694): #0      _RegisterScreenState.build.<anonymous closure>.<anonymous closure> (package:datingapp/screens/register.dart:242:47)
E/flutter ( 8694): #1      State.setState (package:flutter/src/widgets/framework.dart:1088:30)
E/flutter ( 8694): #2      _RegisterScreenState.build.<anonymous closure> (package:datingapp/screens/register.dart:241:27)
E/flutter ( 8694): #3      _CSCPickerState._onSelectedCountry.<anonymous closure> (package:csc_picker/csc_picker.dart:695:36)
E/flutter ( 8694): #4      State.setState (package:flutter/src/widgets/framework.dart:1088:30)
E/flutter ( 8694): #5      _CSCPickerState._onSelectedCountry (package:csc_picker/csc_picker.dart:682:5)
E/flutter ( 8694): #6      _CSCPickerState.countryDropdown.<anonymous closure> (package:csc_picker/csc_picker.dart:837:11)
E/flutter ( 8694): #7      DropdownWithSearch.build.<anonymous closure>.<anonymous closure> (package:csc_picker/dropdown_with_search.dart:53:22)
E/flutter ( 8694): #8      _rootRunUnary (dart:async/zone.dart:1362:47)
E/flutter ( 8694): #9      _CustomZone.runUnary (dart:async/zone.dart:1265:19)
E/flutter ( 8694): <asynchronous suspension>
E/flutter ( 8694): 

[altafc22]

Which version are you using ?

[caqlayan]

Which version are you using ?

Latest. I fixed this bug with changing my String variables to String? for state and city.

  String countryValue = "";
  String? stateValue = "";
  String? cityValue = "";

[rishuriya]

i m not able to select any country, city or state.. drop down menu is completely irresponsive

[micky113]

i m not able to select any country, city or state.. drop down menu is completely irresponsive

@caqlayan above comment is right..try using null safety while declaring Strings

[phanindravarma412]

Hi. I tried to use that tool but it gave error on picking screen. my code is:

                        layout: Layout.horizontal,
                        flagState: CountryFlag.ENABLE,
                        showStates: true,
                        showCities: true,
                        dropdownDecoration: kBoxDecorationStyle,
                          disabledDropdownDecoration: kBoxDecorationStyle,
                          onCountryChanged: (value) {
                          setState(() {
                            countryValue = value;
                          });
                          },
                        onStateChanged: (value) {
                          setState(() {
                            stateValue = value!;
                          });
                        },
                        onCityChanged: (value) {
                          setState(() {
                            cityValue = value!;
                          });
                        },
                        selectedItemStyle: TextStyle(fontWeight: FontWeight.bold, color: Colors.black),
                        dropdownDialogRadius: 15.0,
                        searchBarRadius: 15.0,
                        dropdownItemStyle: TextStyle(fontWeight: FontWeight.bold, color: Colors.black),
                      ),

The error is: 
```I/flutter ( 8694): countryChanged 🇦🇱    Albania null
E/flutter ( 8694): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: Null check operator used on a null value
E/flutter ( 8694): #0      _RegisterScreenState.build.<anonymous closure>.<anonymous closure> (package:datingapp/screens/register.dart:242:47)
E/flutter ( 8694): #1      State.setState (package:flutter/src/widgets/framework.dart:1088:30)
E/flutter ( 8694): #2      _RegisterScreenState.build.<anonymous closure> (package:datingapp/screens/register.dart:241:27)
E/flutter ( 8694): #3      _CSCPickerState._onSelectedCountry.<anonymous closure> (package:csc_picker/csc_picker.dart:695:36)
E/flutter ( 8694): #4      State.setState (package:flutter/src/widgets/framework.dart:1088:30)
E/flutter ( 8694): #5      _CSCPickerState._onSelectedCountry (package:csc_picker/csc_picker.dart:682:5)
E/flutter ( 8694): #6      _CSCPickerState.countryDropdown.<anonymous closure> (package:csc_picker/csc_picker.dart:837:11)
E/flutter ( 8694): #7      DropdownWithSearch.build.<anonymous closure>.<anonymous closure> (package:csc_picker/dropdown_with_search.dart:53:22)
E/flutter ( 8694): #8      _rootRunUnary (dart:async/zone.dart:1362:47)
E/flutter ( 8694): #9      _CustomZone.runUnary (dart:async/zone.dart:1265:19)
E/flutter ( 8694): <asynchronous suspension>
E/flutter ( 8694): 

Did you get any solution ?

[vaishnavi-sangal]

Hi. I tried to use that tool but it gave error on picking screen. my code is:

                        layout: Layout.horizontal,
                        flagState: CountryFlag.ENABLE,
                        showStates: true,
                        showCities: true,
                        dropdownDecoration: kBoxDecorationStyle,
                          disabledDropdownDecoration: kBoxDecorationStyle,
                          onCountryChanged: (value) {
                          setState(() {
                            countryValue = value;
                          });
                          },
                        onStateChanged: (value) {
                          setState(() {
                            stateValue = value!;
                          });
                        },
                        onCityChanged: (value) {
                          setState(() {
                            cityValue = value!;
                          });
                        },
                        selectedItemStyle: TextStyle(fontWeight: FontWeight.bold, color: Colors.black),
                        dropdownDialogRadius: 15.0,
                        searchBarRadius: 15.0,
                        dropdownItemStyle: TextStyle(fontWeight: FontWeight.bold, color: Colors.black),
                      ),

The error is: 
```I/flutter ( 8694): countryChanged 🇦🇱    Albania null
E/flutter ( 8694): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: Null check operator used on a null value
E/flutter ( 8694): #0      _RegisterScreenState.build.<anonymous closure>.<anonymous closure> (package:datingapp/screens/register.dart:242:47)
E/flutter ( 8694): #1      State.setState (package:flutter/src/widgets/framework.dart:1088:30)
E/flutter ( 8694): #2      _RegisterScreenState.build.<anonymous closure> (package:datingapp/screens/register.dart:241:27)
E/flutter ( 8694): #3      _CSCPickerState._onSelectedCountry.<anonymous closure> (package:csc_picker/csc_picker.dart:695:36)
E/flutter ( 8694): #4      State.setState (package:flutter/src/widgets/framework.dart:1088:30)
E/flutter ( 8694): #5      _CSCPickerState._onSelectedCountry (package:csc_picker/csc_picker.dart:682:5)
E/flutter ( 8694): #6      _CSCPickerState.countryDropdown.<anonymous closure> (package:csc_picker/csc_picker.dart:837:11)
E/flutter ( 8694): #7      DropdownWithSearch.build.<anonymous closure>.<anonymous closure> (package:csc_picker/dropdown_with_search.dart:53:22)
E/flutter ( 8694): #8      _rootRunUnary (dart:async/zone.dart:1362:47)
E/flutter ( 8694): #9      _CustomZone.runUnary (dart:async/zone.dart:1265:19)
E/flutter ( 8694): <asynchronous suspension>
E/flutter ( 8694): 

Did you get any solution ?

same error i got

[Sajidpv]

anybody got solution

[Hossameddine-khamma]

try this :

        onCountryChanged: (value) {
          setState(() {
            countryValue = value;
          });
        },

        onStateChanged: (value) {
          setState(() {
            stateValue = value ?? '';
          });
        },

        onCityChanged: (value) {
          setState(() {
            cityValue = value ?? '';
          });
        },