Category "dart"

LateInitializationError: Field '_instance@141084504' has not been initialized

When using getX and Flutter I get following error: LateInitializationError: Field '_instance@141084504' has not been initialized This is the code: import 'dart:

Argument type 'String?' cannot be assigned to parameter type 'String', Triggering Dart's Null Safety either way

In this current snippet I have declared notification to be nullable but get an null safe error for the if loop's notification.body and notification.title. Here'

Can't watch object instance with Riverpod

In a Flutter web project, I'm having this issue with Riverpod: Consumer( builder: (context, watch, child) { final om=watch(human); return Text(om.na

How to use the data from different model and context?

I made the small app, and designed like this: return MultiProvider( providers: [ ChangeNotifierProvider(create: (context) => AModel()),

The argument type 'OrderItem' can't be assigned to the parameter type 'OrderItem'

I am unable to assign my one class to another even though I have imported the lib for them. I am following a course . In this I will fetch the orders from fireb

Android Studio gone nuts all of a sudden

Firstly, Look at the screenshot that I've attached, It is giving me red lines (look to the right) in my entire code (386 errors in 766 lines) all of a sudden (

Flutter settings.name incomplete on page reload

I have a route setup. In the browser, it looks like this. localhost:1234/#/member/D8B5D7F17639A28FE83C47AFFC69592E? I use an onGenerateRoute function like this

What to do when listview.builder does not fit screen width in Flutter

The following is what is returned from a Flutter widget: return Center( child: Column( children: [ SizedBox(

Flutter Firestore: FirestoreBuilder with initial data

I'm making my first Flutter app and I encounter a problem and doesn't found any solution for it. I have a view where I render a Firestore document, and there is

First file created with Flutter leads to white screen

I got Flutter installed. No problems with flutter doctor. Installed Dart en Flutter in Android Studio, opened a new Flutter project and chose for Flutter (and f

Select center item of ListView Flutter

I need to implement a scrollable list, so that the element in the center is automatically highlighted. How to keep track of the central element and constantly h

Firebase Read Data Issue (Bad state: Snapshot has neither data nor error)

Showing this problem every time suddenly, There was no issue at first. AVD can run app but in physical device its not even running Column( children: [

Flutter 3 null safety Warnings and Errors [duplicate]

I just upgraded my flutter to the latest version, (3.0.0) and My projects keeps giving me these warnings and Errors: ../../../../flutter/.pub-

How to set up navigation to a specific page base on FirebaseAuth State?

I want to create an authorization check to display different screens depending on whether the user is logged in. When the user is logged in, then HomeScreen ()

Dart 2.17 has warning when using code snipplet

I just update dart sdk to 2.17 and when I use snipplet (in VScode) to auto generate code for Stateless/Stateful it auto import these two package. But it tel

No result from hyperpay after integration

I'm trying to integrate with HyperPay for payment . I'm using there demo for test . This is the demo demoUrl And I got this response payment_statusData: {resul

Show nested JSON from API in single Page with multiple lists

Im new in Flutter and i'm struggeling with a nested JSON from API which data i want to show in one single page. I get this JSON from a URL and decode it in a cl

Flutter project debug is stopping in my Redmi note 9 phone

Launching lib\main.dart on M2003J15SC in debug mode... lib\main.dart:1 Plugin project :firebase_core_web not found. Please update settings.gradle. Invalid depf

Continuously Retrieving data from stream builder

I am trying to implement stream builder with cloud firestore to retrieve field data. Here is the code: @override Widget build(BuildContext context) { retu

Error while trying to precache local SVG files in Flutter using flutter_svg library

I'm getting following error when I try to pre-cache SVG files in flutter using flutter_svg library: > flutter: ══╡ EXCEPTION CAUGHT BY