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: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

Sore Sardine answered on May 15, 2022 Popularity 9/10 Helpfulness 2/10

answer : Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

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// In my case: I use 'get: package' 
// my issue is I don't call GetMaterialApp() main parent Widget
// use GetMaterialApp() instead MaterialApp()

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

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(    // use GetMaterialApp() instead MaterialApp()
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const HomePage(),
    );
  }
}

// • Note: this does not modify the MaterialApp of the Flutter, 
GetMaterialApp is not a modified MaterialApp, it is just a pre-configured Widget, 
which has the default MaterialApp as a child. 
You can configure this manually, but it is definitely not necessary. 
GetMaterialApp will create routes, inject them, inject translations, inject everything you need for route navigation. 
If you use Get only for state management or dependency management, 
it is not necessary to use GetMaterialApp. GetMaterialApp is necessary for routes, snackbars, internationalization, bottomSheets, 
dialogs, and high-level apis related to routes and absence of context.

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Contributed on May 15 2022

Sore Sardine

0 Answers Avg Quality 2/10

: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.

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