CODEWITHSUNDEEP
flutterdart
Ankit Kumar
Ankit Kumar

Reputation: 399

"Avoid using private types in public APIs" Warning in Flutter

I have been working on a flutter project and I have noticed Avoid using private types in public APIs. Is there a way to fix this warning?

 class SubCategoriesPage extends StatefulWidget {
  final MainModel mainModel;

  // final Ads ad;

  const SubCategoriesPage(this.mainModel, {Key? key}) : super(key: key);

  @override
  _SubCategoriesPage createState() { // Avoid using private types in public APIs.
    return _SubCategoriesPage();
  }
}

Upvotes: 29

Views: 16752

Answers (8)

Laurent
Laurent

Reputation: 681

There is a better and simple solution.
Either, for all the files in your projet:
Modify in analysis_options.yaml at the root of your project

  rules:  
    library_private_types_in_public_api: false

Either, for a single file in your projet:
add the comment

// ignore: library_private_types_in_public_api

above the line with problem (although they says it can be at the start of the file, it doesn't work for me.
Hope this help.

Upvotes: 0

Harish Sharma
Harish Sharma

Reputation: 1549

Because createState method return State<Example> so it's preventing returning any private State.

You need to update your code like this.

class SubCategoriesPage extends StatefulWidget {
  final MainModel mainModel;

  // final Ads ad;

  const SubCategoriesPage(this.mainModel, {super.key});

  @override
  State<SubCategoriesPage> createState() { // Avoid using private types in public APIs.
    return _SubCategoriesPage();
  }
}

Upvotes: 56

Ven Ren
Ven Ren

Reputation: 3358

In my case, I remove '_MyHomePageState'

class MyHomePage extends StatefulWidget {
   const MyHomePage({super. Key, required this. Title});

   final String title;

   @override  //Here remove _MyHomePageState
   createState() => _MyHomePageState();
}

The code in _HomePageState class

class _HomePageState extends State<HomePage> {
   int _counter = 0;

   void _incrementCounter() {
     setState(() {
       _counter++;
     });
   }

  @override
  Widget build(BuildContext context) {
  return Scaffold(
     appBar: AppBar(
     title: Text(widget. Title),
   ),
   
   body: Center(
    child: Column(
       mainAxisAlignment: MainAxisAlignment.center,
       children: <Widget>[
         const Text('You have pushed the button this many times:'),
         Text(
           '$_counter',
           style: Theme.of(context).textTheme.headlineMedium,
         )
       ],
     ),
   ),

   floatingActionButton: FloatingActionButton(
     onPressed: _incrementCounter, //click
     tooltip: 'Increment',
     child: const Icon(Icons.add),
   ),
  );
 }
}

Upvotes: 0

Dongsi D&#228;ngsi
Dongsi D&#228;ngsi

Reputation: 21

this would be the solution:

class MyPage extends StatefulWidget { const MyPage({super.key});

@override State createState() => _MyPageState(); }

Upvotes: 0

Henrrycin123
Henrrycin123

Reputation: 161

I had the same problem

class CotizacionScreen extends StatefulWidget {
  const CotizacionScreen({super.key});

  @override
  State<CotizacionScreen> createState() => _CotizacionScreenState();
}

I solved it by changing the:

@override
_CotizacionScreenState createState() => _CotizacionScreenState();

by:

@override
State<CotizacionScreen> createState() => _CotizacionScreenState();

Upvotes: 15

David S
David S

Reputation: 45

I had the same issue using this code

class MyPage extends StatefulWidget {
  const MyPage({super.key});

  @override
  _MyPageState createState() => _MyPageState();
  }

I tried using this method - State createState() { // Avoid using private types in public APIs. return _MyPageState(); but than I got this error message - The name MyPageState isn't a type so it can't be used a type argument.

Upvotes: -1

Jack&#39;
Jack&#39;

Reputation: 2508

Just change _SubCategoriesPage by State

For those using Riverpod, change _SubCategoriesPage by ConsumerState

Upvotes: 0

kaine119
kaine119

Reputation: 51

Since this is a StatefulWidget, I'm guessing the _SubCategoriesPage class inherits from State, since it's being returned by createState().

If so, the return type can be changed to State. Since State is public, it can safely be returned from the public createState() method.

Upvotes: 5

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