问如何打开用户以颤栗方式终止应用程序的最后一页？

EN

String lastRouteKey = 'last_route';

void main() async {
  SharedPreferences preferences = await SharedPreferences.getInstance();
  String lastRoute = preferences.getString(lastRouteKey);
  runApp(MyApp(lastRoute));
}

class MyApp extends StatelessWidget {
  final String lastRoute;

  MyApp(this.lastRoute);

  @override
  Widget build(BuildContext context) {
    bool hasLastRoute = getWidgetByRouteName(lastRoute) != null;

    return MaterialApp(
      home: Foo(),
      initialRoute: hasLastRoute ? lastRoute : '/',
      onGenerateRoute: (RouteSettings route) {
        persistLastRoute(route.name);
        return MaterialPageRoute(
          builder: (context) => getWidgetByRouteName(route.name),
        );
      },
    );
  }

  Widget getWidgetByRouteName(String routeName) {
    switch (routeName) {
      case '/': return MainWidget();
      // Put all your routes here.
      default: return null;
    }
  }

  void persistLastRoute(String routeName) async {
    SharedPreferences preferences = await SharedPreferences.getInstance();
    preferences.setString(lastRouteKey, routeName);
  }
}