Category "dart"

Do apps built with Flutter suffer from dead code?

Flutter may technically allow you to code once and build an app for multiple platforms, but realistically you do not want to have the same experience on mobile

Type mismatch: inferred type is String? but String was expected error in projects after flutter upgrade

I updated my Flutter version to 3.0.0 and then any project I run it gives me this error e: C:\src\.pub-cache\hosted\pub.dartlang.org\agora_rtc_engine-4.2.0\andr

Flutter: Generating routes with auto_route using a Class with named constructors instead of default constructor

I am trying to generate the router.gr.dart file using the auto_route package in flutter. My class has 3 named constructors: ProfilePage.a({ Key? key,

Convert arabic number to english number & the reverse in Dart

I want to replace Arabic number with English number. 1-2-3-4-5-6-7-8-9 <== ١-٢-٣-٤-٥-٦-٧-٨-٩

The method "collection" isn't defined for the type FirebaseStorage

I'm getting an error trying to store data in firestore. Another issue is using my emulator in android studio ( pixel 5 ) or even all my 4 connected devices. I c

The method 'get' isn't defined for the type 'AppState'. pics with Flutter

Hello everyone. I was studying "Dart and Flutter: The Complete Developer's Guide" on Udemy. And this error showed up, I have no idea how to fix this error. Ever

Flutter - How to save recorded audio file?

I am using flutter_sound to record voice(audio). I can't see any file save on the emulator after the recording stops. Recorder class: import 'package:flutter/ma

How to Disable ReorderableListView Reorder capability but still allow scrolling?

How do we deactivate the ReorderableListView dragging/reordering capabilities in Flutter? I would like to disable the dragging function but still allow scrollin

The state of flutter bloc is not updating if called outside the bloc builder

I initialised all necessary blocs in my main file. Even after this, the state of bloc is not updating if called from outside the bloc builder. I am trying to im

How to open existing flutter project from Xcode?

I have an existing flutter project, which coded with VS Code. Now I want to open it from Xcode to do some configurations in Runner.xcworkspace. But it was unab

How to delete a specific array element in firebase collection?

I have list of appointments stored in firebase collection, how can I delete a specific appointment ?

How to update data and restart the timer on click?

I have data in the application and the exchange rate is updated by a timer every 5 seconds. How can I make it so that when a floatingButton is clicked, the data

How to refresh snapshot in flutter

I what to refresh home page so I create widget called RefreshWidget look like this import 'dart:io'; import 'package:flutter/cupertino.dart';

Flutter won't compile a release build of my app?

After working on this app I tried to build my app to iOS using the flutter run --release command. But whenever I do I get this error *Could not build the precom

I want to change my app name to S&S in flutter ios in info.plist but i am getting error

I want to use "&" in app name for ios. what's method . i want to change name in CFBundleName tag in info.plist file of flutter. i am getting error while com

Parse long String of coords into lat & longs Flutter

I receive a String of Lats & Longs from an API call in Json "lineStrings": [ "[[[-0.301457,51.515017],[-0.288265,51.51014],[-0.280462,51.503057],[-0

Flutter - type 'Future<dynamic>' is not a subtype of type 'List<Map<String, dynamic>>'

I am using mysql1: ^0.19.2 and trying to fetch some data from a database to display in a select_form_field (select_form_field: "^2.2.0"). The database table I'm

Expected a value of type 'Map<String, dynamic>', but got one of type 'Null'

I'm using flutter and managing data by cloud_firestore. I could send data to firestore, but now I'm Struggling with reading data. In firestore, data are stored

Error: Expected a value of type 'int', but got one of type 'String'

screenshoot Error: Expected a value of type 'int', but got one of type 'String' at Object.throw_ [as throw] (http://localhost:50026/dart_sdk.js:5405:11) at Obje

Dart equivalent of Apache Commons Collections Bag

Is there a collection in Dart that allows storing multiple items along with their repetition count? For instance, such a collection is in Apache Commons Collect