dart Questions

Flutter: Error: A value of type 'Object?' can't be assigned to a variable of type 'Output?'

December 1, 2023
khomotjo_codes
2 Answers

I'm still a noob in Flutter and recently I just downloaded the latest Flutter version on my machine but every time I try to run my project I get this error: C:UserskhomoOneDriveDocumentsGitHubluvart-Project.dart_toolflutter_build99035e6341f80e4f3744d732501fdc7dnative_assets.yaml --verbosity=error package:luvart/main.dart [+11601 ms] [+11647 ms] ../../../../AppData/Local/Pub/Cache/hosted/pub.dev/smithy-0.5.2/lib/src/http/http_operation.dart:271:16: Error:…

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Flutter – errror : type 'String' is not a subtype of type 'Map<String, dynamic>'

December 1, 2023
Fandy Ahmad Irianto
2 Answers

errror Exception: type 'String' is not a subtype of type 'Map<String, dynamic> When I call the api for input, there is an exception error in the form of String' is not a subtype of type 'Map<String, dynamic>. How do I…

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how can i show html layout link in flutter?

December 1, 2023
ddongyun
2 Answers

I'm trying to make a html ad widget using html package, but the widget just occupy space, doesn't display layout. Widget _adWIdget() { return Html(data: """ <iframe src=adUrl width="100%" height="44" frameborder="0" scrolling="no" referrerpolicy="unsafe-url"></iframe> """); } I think it's because I…

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Flutter Make Textfield input become uppercase

December 1, 2023
Jack Huang
2 Answers

Is any update for this question Flutter TextField value always uppercase & debounce ? I've already tried some of the code to make the input text become uppercase. class UpperCaseTextFormatter extends TextInputFormatter { @override TextEditingValue formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) {…

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Flutter – how does the initState access the context?

November 30, 2023
Tawhidul Islam
2 Answers

can anyone tell why this giv me an error when I place the CountProvider out side the initState and build function and error go way when I place the CountProvider inside the initState and it also outside the build functionenter…

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Sort List of Strings by having a character Flutter

November 30, 2023
Reham Al-Ra'i
2 Answers

I have a List of strings ["pana", "open","peno","alp","palp"] and i need to sort them by having the letter "p", then alphabetically: so the result should be ["pana", "palp","peno", "open","alp"] How can i do this in Flutter

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How to Overlay a Scrollable Sliver on a SliverAppBar in Flutter?

November 30, 2023
goodUser
2 Answers

I have a CustomScrollView with a SliverAppBar and some slivers. I want to overlay some graphics on the SliverAppBar and have them scroll with the rest of the list. Here's the code I've been working with: import 'package:flutter/material.dart'; void main()…

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Flutter – How make an asynchronous data fetching is completed before build method is called?

November 30, 2023
Abdul Haadi Alhassan
2 Answers

I am using the model view controller pattern and I have a view which uses data from the database to build the view's widgets. The problem is that fetching of the data is asynchronous, so I use the async and…

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Flutter/dart – Connection failed

November 29, 2023
Adam Bodrogi
2 Answers

I created the simplest GET (spring boot backend) imaginable: [...] @GetMapping("basic") @ResponseBody public void basic2() { System.out.println("basic get invoked"); } [...] I'm trying to create a flutter mobile app client for this. I can invoke it via curl and I…

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Flutter – I want to create a button when there is text in the TextField

November 29, 2023
ddongyun
2 Answers

It's probably easy to understand if you look at it from the bottom. final TextEditingController _textEditingController = TextEditingController(); PreferredSizeWidget _appBar() { final deviceSize = MediaQuery.of(context).size; return AppBar( flexibleSpace: SafeArea( child: Row( children: [ Container( width: deviceSize.width / 10 * 8,…

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