Why when I switch page using Get(()=> Page2 of getX package, the app go back to default theme colors? I have a custom theme with yellow color, but then it goes back to the flutter blue default color. Am I missing something?

my code

appBar: AppBar(
    title: Text('Profile'),
    actions: [
      IconButton(
        icon: Icon(Icons.edit_note_outlined), onPressed: () {
          setState(() {
            /*isVisible= !isVisible;
            isReadOnly = !isReadOnly;*/
          });
          Get.to(
              AddNewProduct(),
              duration: Duration(milliseconds: 300),
              transition: Transition.fade
          );
      },
      ),
    ],
  ),

my main

   Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(GetMaterialApp(
      home: const MyApp(),)
  );
}

my custom theme

@override
   Widget build(BuildContext context) {
     return MaterialApp(
       title: 'Flutter app',
       theme: ThemeData(
         primarySwatch: Colors.amber,
         buttonTheme: ButtonTheme.of(context).copyWith(
           textTheme: ButtonTextTheme.primary,
           shape: RoundedRectangleBorder(
               borderRadius: BorderRadius.circular(25.0)
           ),
         )
       ),
       home: const MyHomePage(title: 'Home'),
     );
    }

CodePudding user response：

In your case you are using two app widgets:

• GetMaterialApp in root
• MaterialApp in MyApp

But you have to use only GetMaterialApp.

In your main function remove GetMaterialApp

runApp(const MyApp(),);

In your MyApp widget replace MaterialApp with GetMaterialApp

@override
Widget build(BuildContext context) {
    return GetMaterialApp(
      title: 'Flutter app',
      theme: ThemeData(
          primarySwatch: Colors.amber,
          buttonTheme: ButtonTheme.of(context).copyWith(
            textTheme: ButtonTextTheme.primary,
            shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(25.0)
            ),
          )
      ),
      home: const MyHomePage(),
    );
  }

ANSWER THAT DEPENDS ON CONTEXT

Let's look on structure of your widget tree

GetMaterialApp
  Builder (context1)
    MaterialApp <-- here you are setup your theme
     Scaffold
        AppBar
           Navigator.of(context1).push(MaterialPageRoute(builder: (_) => AddNewProduct()));
        body: ...

As you can see when you are navigating to the AddNewProduct screen you request context from the Builder widget where your theme is not set up and you launch a new screen with the default theme

To solve this you have two options:

• wrap Scaffold with another Builder widget
• move everything that is related to body property to a separate widget

I prefer the second option:

runApp(GetMaterialApp(home: Builder(builder: (context) {
    return MaterialApp(
      title: 'Flutter app',
      theme: ThemeData(
          primarySwatch: Colors.amber,
          buttonTheme: ButtonTheme.of(context).copyWith(
            textTheme: ButtonTextTheme.primary,
            shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(25.0)),
          )),
      home: const HomeWidget(),
    );
  })));

And your HomeWidget:

class HomeWidget extends StatelessWidget {
  const HomeWidget({
    Key? key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Profile'),
          actions: [
            IconButton(
              icon: Icon(Icons.edit_note_outlined),
              onPressed: () {
                Navigator.of(context)
                    .push(MaterialPageRoute(builder: (_) => AddNewProduct()));
              },
            ),
          ],
        ),
        body: ... your content here...
  }
}

CodePudding user response：

You are using two MaterialApp classes. The 'normal' one and the GetMaterialApp. You should get rid of the normal one, and move all parameters to the GetMaterialApp. GetMaterialApp replaces MaterialApp. So like

   Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(GetMaterialApp(
       title: 'Flutter app',
       theme: ThemeData(
         primarySwatch: Colors.amber,
         buttonTheme: ButtonTheme.of(context).copyWith(
           textTheme: ButtonTextTheme.primary,
           shape: RoundedRectangleBorder(
               borderRadius: BorderRadius.circular(25.0)
           ),
         )
       ),
       home: const MyHomePage(title: 'Home'),  );
}

You probably don't need your MyApp class anymore. Or alternatively replace the MaterialApp in MyApp with GetMaterialApp and remove it from main like

  runApp(const MyApp());

CodePudding user response：

You are using 2 material classes.

-> MaterialApp

-> GetMaterialApp

Remove GetMaterialApp from main class

runApp(const MyApp(),);

And replace MaterialApp to GetMaterialApp in MyApp widget

@override
Widget build(BuildContext context) {
    return GetMaterialApp(
      title: 'Flutter app',
      theme: ThemeData(
          primarySwatch: Colors.amber,
          buttonTheme: ButtonTheme.of(context).copyWith(
            textTheme: ButtonTextTheme.primary,
            shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(25.0)
            ),
          )
      ),
      home: const MyHomePage(),
    );
  }

CodePudding user response：

change

 Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(GetMaterialApp(
      home: const MyApp(),)
  );
}

to

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(GetMaterialApp(
theme: ThemeData(
         primarySwatch: Colors.amber,
         buttonTheme: ButtonTheme.of(context).copyWith(
           textTheme: ButtonTextTheme.primary,
           shape: RoundedRectangleBorder(
               borderRadius: BorderRadius.circular(25.0)
           ),
         )
       ),
      home: const MyApp(),)
  );
}

Do not use *GetMaterialApp(* in build use Scaffold