在下面的肘节中，我试图保持应用程序的导航状态，但当杀死设备上的应用程序并返回到程序时，它返回到默认状态。我该如何解决这个问题？
我的腕尺是：

class NavigationCubit extends HydratedCubit<NavigationState> {
  NavigationCubit() : super(NavigationState.empty);

  @override
  NavigationState fromJson(Map<String, dynamic> json) =>
      NavigationState.fromJson(json);

  @override
  Map<String, dynamic> toJson(NavigationState state) => state.toJson();
}

州代码为：

@JsonSerializable()
class NavigationState {
  final PagesTitle currentPage;
  final PagesTitle targetPage;

  const NavigationState({required this.currentPage, required this.targetPage});

  Map<String, dynamic> toJson() => _$NavigationStateToJson(this);

  factory NavigationState.fromJson(Map<String, dynamic> json) =>
      _$NavigationStateFromJson(json);

  static const NavigationState empty = NavigationState(
    currentPage: PagesTitle.dashboard,
    targetPage: PagesTitle.unknown,
  );

}

enum PagesTitle { chart, payout, dashboard, profile, setting, unknown }