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Questions tagged [cubit]

153 questions
15
votes
4 answers

Flutter BLoC library: Where to keep the TextEditingController object: in State, in BLoC / Cubit class or in the widget?

While using BLoC library we store all the variables in a state class. But where to store TextEditingController, which does not change, but the value of it does? Let's say I have a state class like this (Just as example): @freezed abstract class…
Thomas
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11
votes
2 answers

How to use flutter internationalization inside BLOC, Cubit And Repositories for translate messages?

I am working on a multilingual app in Flutter. I used flutter_localizations package for localization and intl package for internationalization. In the normal way inside Widgets, I can use it with help of Context. But the problem is when I want to…
Taleb
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6
votes
1 answer

Can i call cubit from another cubit?

i'm working on an application that uses cubits, to manage the state. Very often when i need to make an api request i need to get my current localization (handle possible exceptions) and then send it to backend. So i guess i should use cubit for the…
Nepath
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6
votes
1 answer

How to use BlocBuilder to refresh a Dialog in Flutter

I have a dialog and I wrap it in a blocbuilder to update it according to the type of state but the dialog just is built First time and after state has changed it doesn't rebuild. showDialog( context: context, builder: (_) { …
Parisa Baastani
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5
votes
4 answers

How to call a function in cubit class in initState?

So, I have made a function in Cubit Class it is to get data from API. For now I just can get the data if I pressed a button. I wanna make the function automatically called when the page/screen is open. For your information, this page is the first…
Alun Paranggi Wicaksono
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5
votes
1 answer

How to add multiple state in one cubit in flutter bloc pattern?

I was developing an application in flutter which does OTP based authentication to log in. Earlier I was managing the states in the class itself so that I can use the setState method to render the UI accordingly. Then I changed into flutter_bloc…
Musthafa
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4
votes
1 answer

Using PageView with Bloc to programmatically 'swipe' pages. Prevent the bloc builder from building on certain states?

I've built a PageView and want to control page swiping programmatically using a Bloc. I'm using a PageController and listening for my bloc's ShowPage state. Then calling pageController.animateTo to animate the PageView to the desired page. The bloc…
Simon Hutton
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4
votes
1 answer

How I can change theme with a switch in flutter using bloc?

I am new in Flutter and bloc. I am making a app with bloc state management that can change the theme as the system theme changed. Now it work fine but I need switch that can override the theme. How can I implement that? I am making this app by…
Sunny Rahi
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3
votes
2 answers

Flutter Bloc Listen to stream and emit state with Cubit

How can I listen to stream and emit state with Cubit? With Bloc we can do something like this: on( (event, emit) async { if (event.play) { await emit.forEach( …
Soliev
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3
votes
1 answer

Constructor definition error due to non-constant value

I'm working on a project using bloc pattern and I have a problem with the initial state of my home page state class. Here's the code: class HomeState extends Equatable { const HomeState({ this.screenTittle = LocaleKeys.mainMenu.tr(), …
F7085
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3
votes
2 answers

bloc_test: Bad state: Cannot emit new states after calling close

I have a problem in Test section of flutter, I wrote a test for simple counter app which uses cubit, but while I run all test it gives me the error mentioned in header, any body knows why? it is necessary to say that while I run the tests one by one…
Jafar ashrafi
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3
votes
1 answer

Flutter - cubit - changing boolean value inside cubit

I would like to change bool values from the cubit, but I can't figure out how to do it. What I want to achieve is, for instance: if (boolean value stored in cubit is true) "show widget A" : "show widget B" My code: class ChangeBoolCubit extends…
mmcib
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3
votes
1 answer

How to implement widget tests by using mock cubit?

I tried to follow the answer to this question, but I was not able to make it work. I reproduced my issue on the counter app, changing it as follow. main.dart class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); …
Federico Conte
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3
votes
1 answer

'ImagePickerCubit' doesn't conform to the bound 'BlocBase' of the type parameter 'B'

I'm getting an error trying to create a BlocBuilder in my app: "'ImagePickerCubit' doesn't conform to the bound 'BlocBase' of the type parameter 'B'. Try using a type that is or is a subclass of 'BlocBase'." I'm implementing it according to…
sdobrzan
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3
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0 answers

Using subscription with Cubit, need to create Timer (streamsubscription with cubit flutter)

I tried to create a timer with bloc cubit but without using it in the state but it make a memory leakage. How i can create a timer with Cubit? i.e, probably using a subscription to this timer (streamsubscription with cubit flutter)
AIX
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