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Questions tagged [changenotifier]

33 questions
14
votes
10 answers

PlatformException(multiple_request, Cancelled by a second request, null, null) in imagePicker

I am using a riverpod provider class to handle picking of image from gallery. However, once an image is picked, I get the error: PlatformException(multiple_request, Cancelled by a second request null, null). Not sure where a second request is coming…
Obisi7
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4
votes
2 answers

Error: Could not find the correct Provider< > above this Widget

I can't see what I've done wrong in the following, but it's throwing a few provider errors and buildcontext: This happens because you used a BuildContext that does not include the provider of your choice. There are a few common scenarios: You added…
Carryn W. Kerr
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3
votes
2 answers

Flutter Riverpod: how to pass multiple arguments in family?

I can pass one argument along with ProviderScope in Riverpod ChangeNotifierProvider family. But I need to pass more than one/multiple arguments/dependencies. For example I have to pass context to access other providers value via…
Golam Sarwar Shakil
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2
votes
3 answers

MultiProvider with AbstractClass notifier

I am trying to create a single interface for Google and Facebook login, my SignInProvider looks like: abstract class SignInProvider with ChangeNotifier { bool get isSigningIn; set isSigningIn(bool isSigningIn); void login(); void…
itsji10dra
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2
votes
2 answers

Flutter multiple notifyListeners calls

I use notifyListeners from ChangeNotifier in flutter. What happens if I call notifyListeners() three times in a row? How many times will the UI be updated in this case? notifyListeners сall code: class Data with ChangeNotifier { String _data =…
House MD
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2
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2 answers

Not sure how to properly implement ChangeNotifierProvider for remembering logged in User in Flutter

I've got an app with working user registration, and using a user provider am able to set the user during registration and retrieve it on the following screen without issue. What I'm having trouble with is trying to properly implement the ability to…
MMDev
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1
vote
1 answer

How to create unique instance of provider class for reusable widget in Flutter?

I am creating a Cart screen where items added to cart are listed. I have a list of item tiles that has name, image, price and the number of item. The number of item has two buttons that increases and decreases the number. When I increase/decrease an…
Shrijal Shrestha
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1
vote
1 answer

ChangeNotifierProvider not updating the listener

I have simplified my real app into the following code below to show the problem. I am basically trying to show the scroll offset of a list view on another widget (the real app is a lot more complex where the widget does other stuff with that…
sudoExclaimationExclaimation
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1
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1 answer

Flutter Changenotifier provider getting disposed after closing and opening of bottom model sheet

In my Flutter app, I have this ChangeNotifier provider. On the homepage a ChangeNotifier is created. ChangeNotifierProvider(create: (_) => UserTeam()), I am setting the value for this provider on button press using this code below. late…
fazilSizzlers
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1
vote
2 answers

How to create one time listener for ChangeNotifier in dart

I want to add a listener to a ChangeNotifier. And trigger this listener only once. For example: final changeNotifier = ChangeNotifier(); changeNotifier.addListener(() { debugPrint("Run…
Yanni
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3 answers

How ChangeNotifier notify the state?

Can someone give me idea how provider notify the state? I don't want to use ChangeNotifierProvider, Can you give me a suggestion without library? I just need better explanation with example. How provider combine InheritedWidget.
Raiyan Safir
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1
vote
2 answers

How to listen to multiple sources in flutter using a ChangeNotifier?

I have the widget whose text needs to update based on what is entered in two TextFields. What is the right way to listen to two sources in this situation (and in general)? I just wrote two classes: class MyTextField extends StatelessWidget { const…
House MD
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1
vote
1 answer

provider above openContainer of bulderFunctions

ChangeNotifierProvider( create: (context) => BuyValuableNotifier(), child: OpenContainer( closedBuilder: (context, action) { return Container(); }, …
farzin
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1
vote
1 answer

Flutter ChangeNotifierProvider issue

I have a ProperyListPage and on each list item clicked this is the action it does. Navigator.push( context, MaterialPageRoute( builder: (context) => ChangeNotifierProvider.value( value: property, child:…
blupointmedia
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0 answers

should use changeNotiferProxyProvider on all providers

I have a question I am building app in flutter for first time and totally new to this language So usualy we create APIs to get all config data n everything which is needed in app so that I can change anything in app remotely without pushing builds…
siddhant sankhe
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