Flutter load json data on start - flutter

Question

My problem is that, before showing the screen. It should load the necessary data while displaying a splashscreen.
It works fine, until it goes to the create provider, the data which has been loaded into the list is getting cleared due to the list getting recreated. I wonder how can i tackle this? How should i load the data (json) file into the list instead.
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({Key? key}) : super(key: key);
#override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
late Future<void> loadJson;
#override
void initState() {
loadJson = QuestionProvider().loadJsonFiles();
super.initState();
}
#override
Widget build(BuildContext context) {
return FutureBuilder(
future: loadJson,
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return const MaterialApp(home: Splash());
} else {
return MultiProvider(
providers: [
ChangeNotifierProvider<QuestionProvider>(create: (_) => QuestionProvider()),
],
child: MaterialApp(
title: "MyApp",
theme: ThemeData(
primarySwatch: Colors.amber,
),
home: const Home(),
)
);
}
},
);
}
}
class QuestionProvider with ChangeNotifier {
final List<QuestionModel> questionList = <QuestionModel>[];
Future<void> loadJsonFiles() async {
final String response = await rootBundle.loadString("assets/questions.json");
final Map<String, dynamic> data = await jsonDecode(response);
for (int i = 0; i < data.length; i++) {
questionList.add(QuestionModel.fromJson(data[i]));
}
}
}

Answer 1

Why not invert the future builder and the providers?
Widget build(BuildContext context) {
return MultiProvider(
[...],
child: Builder(
builder: (context) =>
FutureBuilder(
future: Provider.of<QuestionProvider>().loadJsonFiles,
child: [...]
),
),
);
}
There may or may not be some disadvantages to this method, specifically, the value of the future is no longer cached, if this worries you, I recommend you cache the value within the QuestionProvider class itself.