void main() {
   runApp(const MyApp());
 }

 class MyApp extends StatelessWidget {
   const MyApp({super.key});

   @override
   Widget build(BuildContext context) {
  return MaterialApp(
    title: 'Flutter Demo',
    theme: ThemeData(
      useMaterial3: true,
    ),
    home: const SplashPage(),
  );
   }
 }

Future<void> playAnimation() async {
  await Future.delayed(const Duration(milliseconds: 1000));
  for (int i = 0; i < controllerColorOpacityList.length; i++) {
 await controllerColorOpacityList[i].animateTo(1);
  }
  if (mounted) {
 Navigator.of(context).pushReplacement(_createRoute());
  }
}

Route _createRoute() {
  return PageRouteBuilder(
 transitionDuration: const Duration(milliseconds: 700),
 pageBuilder: (context, animation, secondaryAnimation) => const MainBottomNavigationBar(),
 transitionsBuilder: (context, animation, secondaryAnimation, child) {
   const Offset begin = Offset(0.0, 1.0);
   const Offset end = Offset.zero;

   final Tween<Offset> tween = Tween(begin: begin, end: end);
   final Animation<double> curvedAnimation = CurvedAnimation(
     parent: animation,
     curve: Curves.linear,
   );

   return FadeTransition(
     opacity: curvedAnimation,
     child: child,
   );
 },
  );
}

</RelativeLayout
   <TextView
     android:id="@+id/firstString"
… />
</RelativeLayout>

<receiver
android:name=".HomeWidgetTextTable"…
</receiver>

class HomeWidgetTextTable : AppWidgetProvider() {
 override fun onUpdate(
     context: Context,
     appWidgetManager: AppWidgetManager,
     appWidgetIds: IntArray
 ) {
     for (appWidgetId in appWidgetIds) {
         updateAppWidget(context, appWidgetManager, appWidgetId)
     }
 }
}

internal fun updateAppWidget(
 context: Context,
 appWidgetManager: AppWidgetManager,
 appWidgetId: Int
) {
 val widgetData = HomeWidgetPlugin.getData(context)
 val firstString = widgetData.getString("firstString", null)
 val views = RemoteViews(context.packageName, R.layout.home_widget_text_table)
 views.setTextViewText(R.id.firstString, firstString)
 
appWidgetManager.updateAppWidget(appWidgetId, views)
}

  @override
  void initState() {
 WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
   HomeWidget.initiallyLaunchedFromHomeWidget().then((value) async {
     updateUI();
   });
 });
 super.initState();
  }

  void updateUI() {
 var text = controller.text;
 HomeWidget.saveWidgetData<String>('firstString', text);
 HomeWidget.updateWidget(
   //name: 'TextTable',
   androidName: 'HomeWidgetTextTable',
   iOSName: 'HomeWidgetTextTable',
 );
  }

  @override
  Widget build(BuildContext context) {
 return Column(
   children: [
     TextField(
       controller: controller,
       style: const TextStyle(
         color: Colors.white,
       ),
       onChanged: (value) {
         updateUI();
       },
     ),
     const SizedBox(height: 16),
   ],
 );
  }
}