How to load json in main method Flutter?

Question

I'm trying to load a json file into my main() app method. Can you tell me if this is possible? I've tryed File and rootBundle but it seems that Assets' folder are not ready yet.

here is my code:

ASSETS

  assets:
    - assets/settings/settings.json

MAIN METHOD

void main() async {
    final file = await rootBundle.loadString('assets/settings/settings.json');
      final data = jsonDecode(file);
      Settings settings = Get.put(Settings.fromJson(data), permanent: true);
  runApp(MyApp());
}

Answer 1

Found the Solution using FutureBuilder

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {


  _load() async {
    final file = await rootBundle.loadString('assets/j.json');
    final data = await jsonDecode(file);
    print(data.toString());
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
        future: _load(),
        builder: (_, AsyncSnapshot<dynamic> snapshot) {
          return !snapshot.hasData
              ? Container(
                  color: Colors.white,
                  child: Center(
                      child: Container(
                    child: CircularProgressIndicator(),
                    width: 20,
                    height: 20,
                  )),
                )
              : MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        appBarTheme: AppBarTheme(
          titleTextStyle: Theme.of(context).textTheme.headline1,
        ),
      ),
      home: Scaffold(
        body: Text("Body"),

        // MaxWidthButton(),
      ),
    );
        });
  }
}