Category "dart"

Flutter http post request to a PHP file

I am using Flutter for mobile app development. I need to make a POST request to a PHP file in order to save data in my MySQL server. However, I check the reques

Error when listviewBuilder scrollDirection is horizontal

I got this very simple code, but somehow I get an error when I set scrollDirection to Axis.horizontal I invoke this widget in Page that has MaterialApp and Scaf

Using Dart 2.17 Super Initializer for Widget key

Now that Dart 2.17 allows for the super initializer feature it seems that I can now replace my default boilerplate class WidgetName extends StatelessWidget {

Class X is implemented in both places One of the two will be used Which one is undefined M1

I use Mac M1 and After I upgrade Xcode 13.3.1 , I got this error when I make a build for the project: Class AppleTypeCRetimerRestoreInfoHelper is implemented in

Getting error while running command "flutter build --release"

The android studio builds the apk perfectly with the following command : "flutter build apk" but is throwing error when I try to run "flutter build apk --releas

The body might complete normally, causing 'null' to be returned, but the return type, 'State<StatefulWidget>', is a potentially non-nullable type

I'm new in flutter. I tried to build a webview that have a token. I have used statefull widget but I am facing this error The body might complete normally, caus

type 'List<dynamic>' is not a subtype of type 'List<Parking>'

I'm calling an API but I've been trying to parse this JSON response correctly but I haven't been able to resolve this issue. I call the API, and want to display

Flutter/Dart: How upload binary file to Dropbox?

I'm trying to upload a binary file to Dropbox using https://github.com/dart-lang/http. Following https://dropbox.github.io/dropbox-api-v2-explorer/#files_upload

Is it possible to pick out an item from a list of widget's based on the widget's value in dart / flutter?

I have a list of PopupMenuItem<T> as part of showMenu and I need to access the key for any given item when its clicked. When you click on an item, the sh

Offset argument contained a NaN value flutter fl chart line chart

my purpose is to get a data set to plot a line chart using fl chart package in flutter. But i am getting a exception called offset contain nan value.But the off

Flutter android app doesn't have internet connection

I built an flutter app. I used url_launcher package to navigate social links and other external browser links. And it was perfectly working on android emulator.

Parsing Nested JSON leads to fromJson methods having a "The class 'Data' doesn't have an unnamed constructor." error

So I am trying to parse a Nested JSON from a GET request from VirusTotal but when I create the methods to parse the JSON for what I am looking for it is giving

Trying to build a future context but my build method has an error

I have this code and the problem is that: 'ProfileView.build' ('Future<Widget> Function(BuildContext)') isn't a valid override of 'StatelessWidget.build'

Unable to show the Y axis value in bar tooltip by default using fl_chart package

I am working on bar chart view using fl_chart package and i able to show the bar chart but unable to show the Y-axis value in each bar by default the way i expe

Creating a list of objects from a nested JSON in Flutter

There's a URL address that I decoded to JSON, and there's a certain header (result) that I'm trying to convert to a list of objects (Book). When I print the con

Flutter Notification not showing pop up

Notifications I send with Firebase when the app is open, in the background, and closed work fine. But I want to pop up, like this: My codes; local_notificatio

Dart/Flutter: Http request raises XMLHttpRequest error

I am trying to make an RSS reader with flutter but the program raises the XMLHttpRequest error. In my test I used web (Chrome) as my target platform. I already

Dart: why is a list or map not equal to [] and {} respectively

void main() { var a = []; var b = []; print(a == []); print(a == b); var c = ['c']; print(c == ['c']); var d = 'd'; print(d == 'd'); } fa

Dart: why is a list or map not equal to [] and {} respectively

void main() { var a = []; var b = []; print(a == []); print(a == b); var c = ['c']; print(c == ['c']); var d = 'd'; print(d == 'd'); } fa

GetStream - Flutter - Connection already available for user

Error facing in Flutter GetStream SDK.. GetStream is chatting SDK in which I am using messaging feature. I am facing issue with creating connection with the use