I am trying to implement the below code block but User _user showing warning as: Non-nullable instance field '_user' must be initialized. Try adding an initializer expression, or a generative constructor that initializes it, or mark it 'late'.dartnot_initialized_non_nullable_instance_field class _LandingPageState…
I'm on vscode and trying to start a flutter project ( note: when i was installing flutter and dart it did not give me an option to locate SDK) and now when i click on "Flutter:new project" it doesn't open…
BUILD FAILED in 1m 21s Running Gradle task 'bundleRelease'... 82.6s ┌─ Flutter Fix ─────────────────────────────────────────────────────────────────────────────────────┐ │ [!] Your project requires a newer version of the Kotlin Gradle plugin. │ │ Find the latest version on https://kotlinlang.org/docs/releases.html#release-details, then update │ │ D:FLUTTER_PROJECTStestlumiandroidbuild.gradle:…
I'm trying to create a layout in Flutter where all the children of a GridView fit within its container without scrolling. Here's my code import 'package:flutter/material.dart'; import 'package:sizer/sizer.dart'; class GridViewExample extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold(…
class A { int b; int c; A(this.b, this.c); } void testFunc(Object param) { print((param as A).b); print(param.c); //is there documentation somewhere? Why is there no need type casting? } Why is there at second time no need type casting?…
Below is my flutter TextEditingController TextEditingController displayName = TextEditingController(); when fetching document from firebase storage and assiging to the above controller, it throws an error called Exception has occurred. _TypeError (type 'String' is not a subtype of type 'TextEditingController') FirebaseFirestore…
I have a unique situation where flutter/dart seems to be requiring a coma for line endings instead of semi colon and I am completely baffled. Is this correct behavior or is there some major bug going on? SharedPreferences.getInstance().then((prefs) => {…
Is there a way I can use the magic of generics to write a function that returns an optional if the input is optional, otherwise both non-null? For example, I have two functions that I want to combine into one.…
I developed an app in flutter, in this app we are keeping a unique id using UUID package, and I am storing that uuid using shared preferences for guest login purpose. We tested app on emulator, simulator and 10 to…
I have sizedbox.square which align with text on design, but i can't understand how can they be on the same level and at the same time be at the beginning of the divider. I tried a lot of things, but…