I am developing a tool that generates dart code and I am facing this runtime error when executing a program having a circular dependency. file.dart:xx:xx: Error: Constant evaluation error: this.b = const B(),, ^ file:xx:xx: Context: Constant expression depends on…
I have the following class setup. I was able to store the JSON, but I'm having trouble retrieving it. import 'package:flutter/material.dart'; class SvItem with ChangeNotifier { final String id; final String meatType; final String meatTypeImg; final String meatCut; final String…
I can't seem to get this code to run using VS Code, and I need the results of the emulator (mobile app on an iPhone), is anyone able to run it and get the output? (Can you please post screenshots…
I am using flutter to design UI with sidebar navigation, which will be collapsed (icon only) by default and show the labels when expanded. When the sidebar is expanded, it flickers an error A RenderFlex overflowed by 4.3 pixels on…
I have created a Flutter Cubit class that has a method that create an object of itself, the problem is when I try to create a variable of this class with this method I get a type error, so what…
NOTE: I ended up restructuring things instead, eliminating the sibling-communication path. ParentWidget |-ChildWidgetA |-ChildWidgetB Because I needed two different versions of ChildWidgetA (one static, one with editing fields), and because I needed bi-directional communication (sibling B sends command to A,…
I want to print data.length after listening to this stream but the program executed synchronously. How can I listen to this data stream without using the await-for syntax void main() async { final file = File('assets/text_long.txt'); final stream = file.openRead();…
I have a simple class like this: class Staff { final String name; final String id; Staff({this.name, this.id}); } Then following a tutorial article on applying BLoC, I put it in State class, like this: class SignInState { final String…
error: The argument type 'File?' can't be assigned to the parameter type 'File'. (argument_type_not_assignable at [aplikasi_scan_plat_nomor] libscreenhome.dart:82) File? pickedImage; image: FileImage(pickedImage),
I am working on an App Brewery Angela's course on Flutter, and I have reached the BMI calculator application. Everything was fine until I tried to change the color of the Male and Female cards using Gesture Detector upon tapping…