Dart GetX Unexpected Null Value when refreshed

Question

I redirected my Home View page to another view.

class HomeView extends GetView<HomeController> {
  const HomeView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {

    return CustomScaffold(
    body: Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        
        ElevatedButton(
          onPressed: () {
            Get.to(() => AirView());
          },
          child: Text("GO NEXT"),
        ),
);

After going to the next page, i encounter an error when I REFRESH the page.

No Directionality used.

Console Error

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════ The following TypeErrorImpl was thrown building Directionality(textDirection: ltr): Unexpected null value. The relevant error-causing widget was: Directionality Directionality:file:///C:/Flutter/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.5/lib/get_navigation/src/root/get_material_app.dart:328:12 ..\…\root\get_material_app.dart:328 When the exception was thrown, this was the stack: C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/internal/js_dev_runtime/private/ddc_runtime/errors.dart 251:49 throw C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 528:63 nullCheck packages/get/get_navigation/src/routes/route_middleware.dart 199:50 page packages/get/get_navigation/src/root/get_material_app.dart 347:23 initialRoutesGenerate packages/flutter/src/widgets/app.dart 1559:27 packages/flutter/src/widgets/navigator.dart 3290:41 restoreState packages/flutter/src/widgets/restoration.dart 887:5 [_doRestore] packages/flutter/src/widgets/restoration.dart 873:7 didChangeDependencies packages/flutter/src/widgets/navigator.dart 3336:11 didChangeDependencies packages/flutter/src/widgets/framework.dart 4963:11 [_firstBuild] packages/flutter/src/widgets/framework.dart 4781:5 mount packages/flutter/src/widgets/framework.dart 3817:15 inflateWidget ......

Second Page Codes:

  const AirView({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('AircoView'),
        centerTitle: true,
      ),
      body: const Center(
        child: Text(
          'AirView is working',
          style: TextStyle(fontSize: 20),
        ),
      ),
    );
  }
}

@mohammadesmaili yeap, runApp( GetMaterialApp( title: "Application", debugShowCheckedModeBanner: false, initialRoute: AppPages.INITIAL, getPages: AppPages.routes, ), ); — CigarDon, Oct 07 '22 at 07:36

score 0 · Answer 1 · answered Oct 07 '22 at 07:43

0

you are not using materialapp because you are using getmaterialapp than you have to wrap your Directionality in mediaquery like this.

    import 'dart:ui' as ui;
    ...
    new MediaQuery(
        data: new MediaQueryData.fromWindow(ui.window),
        child: new Directionality(
            textDirection: TextDirection.rtl,
            child: new MyHome())))

answered Oct 07 '22 at 07:43

MANISH DAYMA

1,126
3
18

Where should i add this block of codes? at elevated Button? – CigarDon Oct 07 '22 at 07:49
I can't see Directionality in your code but in error, it's there. so where ever you're using Directionality put mediaquery widget above it. – MANISH DAYMA Oct 07 '22 at 07:52
I didnt use any Directionality @ManishDayma – CigarDon Oct 07 '22 at 08:00
please share the code to reproduce. – MANISH DAYMA Oct 07 '22 at 08:56
The above codes reproduces the error, Get.to -> to a GetView page, and then refresh – CigarDon Oct 07 '22 at 10:33

score 0 · Accepted Answer · answered Oct 10 '22 at 03:11

Managed to solve the issue.

Used get_cli: ^1.8.1 Package

https://pub.dev/packages/get_cli

then use this command: get create page:airco on home

This will then automatically generate Children under GetPage in the file app_pages.dart


GetPage(
      name: _Paths.HOME,
      page: () => const HomeView(),
      binding: HomeBinding(),
 children: [
        GetPage(
          name: _Paths.AIRCO,
          page: () => const AircoView(),
        ),
      ],
    )

Paths is from app_routes (automatically created by Get CLI package as well)

Dart GetX Unexpected Null Value when refreshed

2 Answers2