dart Questions

Flutter – Null check operator used on a null value for userProvider

February 2, 2024
Harsha Kumar
3 Answers

I am new to Flutter. It is giving me an error saying that I have used null check operator on a null value Links for reference: https://github.com/ahkharsha/pregAthI/blob/main/lib/widgets/community-chat/community_list_drawer.dart https://github.com/ahkharsha/pregAthI/blob/main/lib/auth/auth_controller.dart My code: class CommunityDrawer extends ConsumerWidget { const CommunityDrawer({super.key}); @override Widget build(BuildContext…

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Converting a local html file into Uint8List data – Flutter, Dart

February 1, 2024
Abdulla Amangeldi
2 Answers

I need to convert a local HTML file to a Uint8list so it could be printed. Solutions I've found don't seem to work. I tried using readAsArrayBuffer but it did not work for me. void loadImage(html.File file) async { final…

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Namespace not specified. Specify a namespace in the module's build file Flutter Android Studio

February 1, 2024
Alpit Panchal
2 Answers

Suddenly I'm getting the namespace error in my flutter project. What went wrong: A problem occurred evaluating root project 'android'. A problem occurred configuring project ':app'. Could not create an instance of type com.android.build.api.variant.impl.ApplicationVariantImpl. > Namespace not specified. Specify a…

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Flutter – How to get only the user's data from firestore rather than all data in the collection?

January 31, 2024
user23326424
2 Answers

I'm trying to make a flutter app that allows users to log into an account and then store contact details in a firebase firestore. It currently shows the contact details for all registered accounts. I want the user to be…

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Don't use 'BuildContext's across async gaps in android studio using flutter

January 31, 2024
Ioannis Papazoglou
3 Answers

I'm developing a login page on flutter using Firebase and I can't display the popups for wrong email/password, What am i doing wrong? I've read and watch many videos and answers here but it seems i can't find a proper…

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Flutter – "Incorrect use of ParentDataWidget" error when creating new navigation route

January 30, 2024
rummy
2 Answers

I have a button that creates a new a navigation route, using the same build method as the page it's in. onPressed: () { Navigator.push( context, MaterialPageRoute(builder: (context) => ReadDb(value)), ); }, Calling the build method, this error gets thrown…

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Flutter – I have a problem: type '() => Null' is not a subtype of type '(int) => void' in type cast

January 30, 2024
Ildar
2 Answers

I started studying mobile development and had a lot of questions and problems. I have classes. I'm passing a field value "score" and getting an error. Help me to understand. Thank you. My error: type '() => Null' is not…

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Flutter – I have written code for image widget and also given path in pubsec.yaml file then also its showing error

January 30, 2024
Priyanka Patel
2 Answers

this is the error Image provider: AssetImage(bundle: null, name: "assets/images/login.jpg") Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#e28ce(), name: "assets/images/login.jpg", scale: 1) here is my code Image( image: AssetImage("assets/images/login.jpg"), ), pubsec.yaml assets: - assets/images/

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I'm making an application in Flutter but the items don't fit on the screen

I'm making an application in Flutter but the items don't fit on the screen, when I want to use ListView the position of the items get mixed up and it looks terrible, how can I edit these codes? import 'package:flutter/material.dart';…

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'This expression has a type of 'void' so its value can't be used' error in Flutter

January 29, 2024
Spicy Pumpkin
3 Answers

I am making an app and am now getting this error. I don't know why. I've tried looking at every other StackOverflow post about this error, and I tried all the suggestions, but nothing worked. Here is the code: class…

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