flutterメモ

@riverpod
class SomeOtherController extends _$SomeOtherController {
  @override
  // you can add named or positional parameters to the build method
  Future<String> build(int someValue) async {
    final someString = await someFutureThatReturnsAString(someValue);
    return anotherFutureThatReturnsAString(someString);
  }

  // other methods here
}

// this provider takes a positional argument of type int
final state = ref.watch(someOtherControllerProvider(42));

WidgetsBinding.instance.addPostFrameCallback((_) {
  // build完了後の処理をここに書く
});

final routerProvider = Provider(
  (ref) => GoRouter(
    routes: [

You are missing a required dependency on json_annotation in the "dependencies" section of your pubspec with a lower bound of at least "4.8.0"

flutter pub add json_annotation

        GoRoute(
          path: 'setting',
          builder: (BuildContext context, GoRouterState state) {
            return const XXXView();
          },
          routes: [
            GoRoute(
              path: 'details',
              // pageBuilderを使って、MaterialPage (fullScreenDialog: true) を返す。
              pageBuilder: (BuildContext context, GoRouterState state) {
                return const MaterialPage(
                  fullscreenDialog: true,
                  child: YYYView(),
                );

<uses-permission android:name="android.permission.INTERNET"/>

/             -- HomeScreen()
  details -- DetailsScreen()

/error    -- ErrorScreen()

    final re = RegExp(r"\p{Script=Katakana}+", unicode: true);
    expect(re.hasMatch('ア'), true);

scrolledUnderElevation: 0,