How to select only one checkbox from Checkbox Listtile in Flutter - flutter

Question

Here I've one service page where I've displayed all the services, and there I can select multiple services. but I want to select only one service. I've used the checkbox Listitle for the service selection. I want that user can select only one service not multiple services at a time.
Here is code i've tried :
class _AddWalkinServiceScreenState extends State<AddWalkinServiceScreen>
with TickerProviderStateMixin {
List<int> servicesIds = [];
int selected = 0;
Map<String, bool> _selection = {};
List<BspServices.Service> selectedServices = [];
SearchBarController _controller = new SearchBarController();
String _searchText = '';
List<dynamic> finalList = new List();
List<dynamic> searchList = new List();
bool isLoading = false;
AnimationController controller;
Animation<double> animation;
#override
void initState() {
super.initState();
controller = AnimationController(
duration: const Duration(milliseconds: 500), vsync: this);
animation = CurvedAnimation(parent: controller, curve: Curves.easeInQuint);
controller.forward();
}
Widget _renderServices(AddWalkinServiceViewModel awsVm) {
List lovCountryServices = searchList.length != 0 ? searchList : finalList;
if (lovCountryServices == null || lovCountryServices.length == 0) {
return Container(
child: Center(
child: Text("No Services available for this combination"),
),
);
}
// print(lovCountryServices);
return Container(
child: finalList.length < 1
? ListTile(
leading: CircularProgressIndicator(),
)
: ListView.builder(
shrinkWrap: true,
padding: const EdgeInsets.all(8.0),
itemCount: lovCountryServices.length,
itemBuilder: (BuildContext context, int index) {
var item = lovCountryServices[
index]; // should be outside build function
List items = item['services'];
return ExpansionTile(
title: Text(item['name']),
children: List.generate(items.length, (i) {
_selection[items[i]['name']] =
_selection[items[i]['name']] ?? items[i]['isSelected'];
return CheckboxListTile(
title: Text(items[i]['name']),
value: _selection[items[i]['name']] == null
? false
: _selection[items[i]['name']],
onChanged: (val) {
setState(() {
_selection[items[i]['name']] = val;
if (val) {
servicesIds.add(items[i]['id']);
List<BspServices.Service> services =
selectedServices.where((service) {
return service.mainCategory == item['name'];
}).toList();
SubCategory subService = new SubCategory(
id: items[i]['id'],
name: items[i]['name'],
);
List<SubCategory> subCategories = [];
if (services.length < 1) {
subCategories.add(subService);
selectedServices.add(
new BspServices.Service(
mainCategory: item['name'],
mainCategoryId: item['id'],
subCategory: subCategories,
),
);
} else {
print('services in else');
print(services[0].subCategory);
subCategories = services[0].subCategory;
subCategories.add(subService);
}
} else {
servicesIds.removeWhere((service) {
return service == items[i]['id'];
});
List<BspServices.Service> services =
selectedServices.where((service) {
return service.mainCategory == item['name'];
}).toList();
services[0].subCategory.removeWhere((subService) {
return subService.id == items[i]['id'];
});
}
});
print('servicesIds after set state');
print(servicesIds);
},
);
}),
);
},
),
);
}
Widget content(BuildContext context, AddWalkinServiceViewModel awsVm) {
Orientation orientation = MediaQuery.of(context).orientation;
var colorStyles = Theming.colorstyle(context);
final appBar = SearchBar(
controller: _controller,
onQueryChanged: (String query) {
print('Search Query $query');
setState(() {
_searchText = query;
});
_searchFilter();
},
defaultBar: AppBar(
elevation: 0,
centerTitle: true,
leading: IconButton(
icon: Icon(Icons.arrow_back_ios),
onPressed: () {
Navigator.pop(context);
// NavigationHelper.navigatetoBack(context);
}),
title: Text('Select Services'),
),
);
return new Scaffold(
backgroundColor: colorStyles['primary'],
appBar: appBar,
bottomNavigationBar: bottomNavigationBar,
body: FadeTransition(
opacity: animation,
child: new Container(
margin: EdgeInsets.only(top: 10),
decoration: new BoxDecoration(
color: Colors.white,
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(50.0),
topRight: const Radius.circular(50.0),
),
),
child: isLoading ? FadeInUi() : _renderServices(awsVm),
),
),
);
}
#override
Widget build(BuildContext context) {
return new StoreConnector<AppState, AddWalkinServiceViewModel>(
converter: (Store<AppState> store) =>
AddWalkinServiceViewModel.fromStore(store),
onInit: (Store<AppState> store) {
print('store.state.servicesState.servicesByCountry');
print(store
.state.servicesState.servicesByCountry.servicesByCountry[0].name);
Map<String, dynamic> services =
store.state.servicesState.servicesByCountry.toJson();
finalList = services['servicesByCountry'];
print('finalList = $finalList');
},
builder: (BuildContext context, AddWalkinServiceViewModel awsVm) =>
content(context, awsVm),
);
}
}

Answer 1

UPDATED
List<Map> services = [];
List<int> selections = [];
#override
void initState() {
super.initState();
getList();
}
void getList() async {
//get data from internet/api
//for ex. I m using offline data
setState(() {
services = List.generate(
10,
(ind) => {
'name': 'Service Category $ind',
'services': ['Service 1', 'Service 2']
}).toList();
selections = List.generate(10, (ind) => -1).toList();
});
}
#override
Widget build(BuildContext context) {
return Container(
padding: EdgeInsets.all(20),
color: Colors.white,
child: services.length < 1
? ListTile(
leading: CircularProgressIndicator(), title: Text('Loading...'))
: ListView.builder(
itemCount: services.length,
itemBuilder: (con, ind) {
return ExpansionTile(
title: Text('${services[ind]['name']}',
style: TextStyle(color: Colors.black)),
children:
List.generate(services[ind]['services'].length, (ii) {
return CheckboxListTile(
title: Text('${services[ind]['services'][ii]}',
style: TextStyle(color: Colors.green[900])),
value: selections[ind] == ii,
onChanged: (b) {
setState(() {
selections[ind] = ii;
});
});
}).toList());
}));
}