Questions tagged [flutter-change-notifier]
189 questions
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Flutter what is the best approach to use navigator and ChangeNotifierProvider together
I'm new to flutter, this question may be a very basic one.
I have a firebase phone auth login page to implement this,
if the user is logged in, then navigate to home page
else if the user is a new user, then navigate to the sign-up page
The problem…
gavrbhat
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ChangeNotifierProxyProvider getting null value
I am new to flutter.
In my application locale information is found when the user login.
So the idea is when the user login, it will pass the locale to AppLanguage.
I have written ChangeNotifierProxyProvider to get the locale inside authentication…
Janaka
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1 answer
How to use Flutter hooks with ChangeNotifer
Assume we have a complex Model with ChangeNotifer, so how should I automatically update the UI when model changes?
Here is what I came up with, but looks weird, is it right, is there a better way of doing this?
class Playground extends HookWidget {
…
Ali80
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1 answer
How to close Functions in ChangeNotifier Provider Flutter
How to close a Function without disposing it. I needy this answer because when I log out, I need to close the functions in ChangeNotifier Class.
This Is my ChangeNotifier Class:
class ChatAndRequestProvider extends ChangeNotifier {
bool…
bd_28
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Flutter: Resolving Error performing updateData, NOT_FOUND: No document to update
I'm having the following error when I try to update my userData in my firebase DB
E/flutter ( 4756): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(Error performing updateData, NOT_FOUND: No document to update:…
hermie_brown
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How can I let my DropdownButton affect my TextFormField
I think this is probably not too complicated, but I am new to coding and don't understand this, nor could I find an explanation online that I could understand.
In my app my AppBar includes both a title and a bottom, the title has been just text, and…
Bill Watts
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How to push a route from ChangeNotifier?
My question is quite simple: How do i initiate navigation from the ChangeNotifier?
I have a dashboard setup with a consumer and i want to change the route depending on the result of certain operations in the ChangeNotifier Model.
A similar question…
fideldonson
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Flutter Provider Consumer need to return null
Hi I use Provider (https://pub.dev/packages/provider) into my Flutter app. Now I want to manage the floating action button into a scaffold using a provider consumer, to be sure that the scaffold is not rebuilded when I need to hide the FAB…
Massimo Caroccia
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Provider.of<> returning null with ChangeNotifierProxyProvider?
In my test code below I have a flag that determines whether to use a ChangeNotifierProvider or a ChangeNotifierProxyProvider. When I press the RaisedButton both approaches properly display my GroupEditorPage.
const isUsingChangeNotifierProxyProvider…
buttonsrtoys
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Update UI after property in model class changed
I have a list of base64 images comes from server and I have a class to cache them in temporary folder.
Because caching process may take some time, images not showing in UI specially when image is large .
I have a loading property in my model class…
BeHappy
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1 answer
Is Change Notifier with Provider/Scoped Model a bad State Management solution for Flutter?
In my Flutter projects, I usually tend to use Provider together with Change Notifier both for Dependency Injection and State Management purposes, because I find it to be so much more intuitive and less boilerplate than other solutions, and I've…
thassio-vinicius
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1 answer
ChangeNotifierProvider dosen't create new ChangeNotifier instance
I have a Master-Detail page for tablet.
I want to change the details page when I select an item in the list.
So I wrote code like this,
class AttendancesModel with ChangeNotifier {
final int userId;
AttendancesModel(this.userId);
…
kiyosuke
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1 answer
Why is my "Data"."data" not updated in ChangeNotifier class using ChangeNotifierProvider?
I am new to flutter.
I want to ask why when my text field's onChange did not trigger: "Provider.ofContext).updateData(newString);".
The value of my Provider.of(context).data is not updated and with the 2 print statements, only 'called1' is always…
robertos95
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1 answer
Encountering error while using ChangeNotifierProvider.value in Gridview.builder
This is likely a mistake and is unsupported.
If you're in this situation, consider passing a key unique to each individual constructor.
Above is the error which reflects on Running the code with a flutter widget as a child:-
…
Harsh J
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1 answer
Flutter: Subtype Error when creating an widget with generics
I'm using viewmodels for my app that extend ChangeNotifier. To use them I'm trying to implement an generic base widget:
class BasePageWidget
extends StatefulWidget {
final…
CoatCoader87
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