Questions tagged [dart]
Dart is a class-based, statically(& strongly)-typed programming language for building web and mobile applications. Dart compiles to modern JavaScript to run in the browser and compiles to native code to run on mobile platforms like Android and iOS. Dart also runs on the command-line for scripting and server-side apps.
94,573
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Dartfrog websocket broadcast message
i was digging inside of dart_frog to know it capabilities , it sounds awesome until i've started using websocket ,
i've implemented it like this way
final handler = webSocketHandler(
(channel, ...
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9
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How To Insert query in Flutter with PostgreSQL new package? postgres: ^3.2.1
How To Insert query in Flutter with PostgreSQL new package? postgres: ^3.2.1
all the other documentation are old, deprecated and not working anymore, could you someone please help on this..?
How to ...
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1
answer
17
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Unable to pass required argument to parent class using super
After super method in the child class, I am unable to pass a parameter value to the parent class.
void main() {
MobilePhone mp = new MobilePhone(modelName: "7T", brandName: "...
- 155
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stop flutter_background_service when app is down (flutter)
Can't leave the background service. Give me a solution, please.
service_background.dart:
@pragma("vm:entry-point")
Future<bool> onStart(ServiceInstance service) async {
if (service ...
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2
answers
23
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when we run flutter code in development mode in physical device, does application live only in RAM
So when we Run code, by F5 in VS code, does that Application on physical device leave only on RAM?
This question arise will using image_picker library on Handling MainActivity destruction , which say ...
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1
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Riverpod - share data between providers
What's the canonical way to share data between two providers created with riverpod? In addition those two providers might only be very loosely connected logically speaking...
Let's assume we've got an ...
- 1,480
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2
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31
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How to extract from a column or row, an list of their widgets?
I have a column, is it possible to extract from it the list of children that are in this widget?
final listWidget = [];
listWidget.add(
Column(children: [
SizedBox(),
...
- 23
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1
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Can't Install Flutter on Windows
I'm trying to install Flutter using VS code and it shows this error:
What happened:
Firstly, I had Flutter installed and worked fine. All projects build fine, and everything is going well. I tried to ...
- 91
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1
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25
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How to generate methods in `PerFieldToJson` using `json_serializable`?
Minimum reproducible code:
// foo.dart
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:cloud_firestore_odm/cloud_firestore_odm.dart';
import 'package:json_annotation/...
- 27.3k
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1
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Flutter Web not Showing error Message Correctly
This is my Flutter app.
void main() {
Future.delayed(Duration.zero, () {
throw "boom";
});
runApp(MaterialApp(home: Scaffold(body: Center(child: Text("Hello")))));
}
...
- 19.4k
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I am running into an `Undefined symbol` issue with dart-ffi and Go
I am trying to use ffigen to develop a library that I can use to call a go package from dart code.
My current approach is to use the basic setup that you get from running the initial ffigen
flutter ...
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20
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Flutter , How to form a sentence from a words that broadcasted from a websocket
Im using a websocket to make a chatbot. This is a broadcast Stream
WebSocketHelper(@Named('webSocketUrl') String url)
: channel = IOWebSocketChannel.connect(url) {
_broadcastStream = ...
- 317
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0
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16
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Unable to get real-time chat updates in Pusher Flutter
I've implemented a chat functionality on an app, however, I'm finding it difficult to get real-time chat updates, as well as updating UI with new messages. My Chat gets sent to the database but no ...
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How to compile dart programs without Error: AOT compilation failed
When I run "dart compile exe D:\projects\dt\bin\dt.dart"
it shows:
Error: AOT compilation failed
PathAccessException: Cannot open file, path = 'd:\projects\dt\bin\dt.exe' (OS Error: Access ...
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1
answer
28
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How to upload image using dart http
I'm trying to create a photo upload feature using dart http.
when I run the code but it fails to upload.
this is my image picker
pickImage(ImageSource source) async {
final XFile? image = await ...
- 29