Category "dart"

Fix all const warning flutter

How to fix this all const warning in VSCode? It's hard if I fix one by one.

Flutter returns null for AppLocalization.of(context)

I am using Flutter to build a Web-App and I want to use the internationalization feature of flutter on my new app. I was following the Flutter-Tutorial and I tr

Hi, I am developing an mobile application using flutter and I am bit confused if the strategy I am following is correct?

I created a separate Stateless widget called CustomAppBar will certain parameters. Every I need appBar in my app. I will use CustomAppBar and give required para

How can we add / remove the object values with respect to entries with hashmap?

List<ServiceModel> serviceList = [ ServiceModel(id: "12", name: "Repair", subServiceList: [ SubServiceModel(name: "Toilet Repair", id: "123"),

how to resolve sqflite error : MissingPluginException sqflite

I created my database with this function: void CreateDatabase() async { database = await openDatabase( 'todo.db', version: 1, onCrea

How to do file operations (create/write/update/delete files) using the Flutter "saf" Package

How to do file operations (create/write/update/delete files) using the Flutter "saf" Package. link:- pub.dev/packages/saf I didn't find any solutions on Google.

Flutter: converting an Image object to a base64 string without using a File

I grabbed somewhere the following code to convert a picture to a base64 string without accessing a file : String ImageToString(Image image) { String result;

how to disable scrolling NestedScrollView

I tried to use physics: NeverScrollableScrollPhysics() in NestedScrollView but still yet is still scrolling. How can disable scrolling in NestedScrollView if th

ERROR: The argument type 'Object?' can't be assigned to the parameter type 'String?'

I have a TextFormField widget wrapped inside a StreamBuilder, in TextFormField widget, inside the decoration, when is pass snapshot.error to the errorText argum

The getter 'documents' isn't defined for the type 'Object'

I have a collection called status in Firebase. I'm trying to pull data from here. However I am getting this error. I tried some solutions but I still get the sa

Flutter error Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1102

Hello I have a flutter error although i dont have any bugs in code. This is all error: /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/provider-3.2.0/lib

Missing type arguments for generic type 'Future<dynamic>'. Try adding an explicit type, or remove implicit-dynamic from your analysis options file

How do I resolve this issue without removing the implicit-dynamic form analysis options file? Error: My Code: Future<void> _scrollToBottomOnKeyboardOpen(

different in signature in Dart & node

am trying to make a signature for a HTTP request , using flutter/dart for the app and the server in NodeJs but i have a problem there is little different betwee

Listen a ValueNotifier from class

Hi im new in flutter and i have a class for notify changes of a global values in my app like this import 'package:flutter/material.dart'; class GlobalNotifier

Problem with time picker not working flutter

Problem with the time picker not working when I choose the time it should be typed automatically in the field code : https://codeshare.io/WddQvl onTap: () {

Flutter Spinner date picker (CupertinoDatePicker) change order/swap location

I want to use Spinner date picker but I did not find it in flutter packages I found something similar CupertinoDatePicker which works fine. but I can't change

How to make a simple Flutter stopwatch foreground service on Android?

I am implementing a stopwatch (0 to .. seconds counter) in my app. I succesfully implemented it in my Dart code, but I need it to work even if the app is closed

Parsing csv data - Flutter

I'm receiving data from the csv file as SERVICE_ID‡WEIGHT_ID‡DISTANCE_ID‡BASE_PRICE‡IDENTIFIER PARCEL‡W0‡‡0.00&

Send emails from flutter application without expenses or smtp server and without opening the gmail app

As the title says, I would like to know if there is any way to send emails without having to use an external service, that charges me for sending the messages,

why the second short form constructor gives the error that name and age must be initialized but not the commented ctor?

I am beginner in dart language. So i created this class .. class X{ String name; int age; // X(this.name,this.age); X(name,age); } In this code the sh