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What is Flutter?

Flutter is an open source framework by Google for building beautiful, natively compiled, multi-platform applications from a single codebase.

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Flutter - RangeError (index): Invalid value: Not in inclusive range 0..9: 10

You can simply use .length method to iterate properly through the result.for(var i = 0; i < map["items"].length; i++){...} Or to get rid of code duplication, use a .forEach()map["items"].forEach((ite...

Tags: Coding, Lập trình, error

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Flutter- How to accept only numbers in TextFormFields?

Try below code, refer FilteringTextInputFormatterimport below libraryimport 'package:flutter/services.dart'; Your Widget:TextFormField( keyboardType: TextInputType.number, inputFormatte...

Tags: Coding, Lập trình, Flutter

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Why orientation == Orientation.portrait is always true although my device is already in landscape

To get the current orientation of your device, you can take help of the MediaQuery class and get the orientation like :- var currOrientation = MediaQuery.of(context).orientation And optimise your...

Tags: Flutter, Solution

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Flutter : Wait for keyboard dismissed then call navigator.pop

Okay at the end of screen B try creating this class:class AlwaysDisabledFocusNode extends FocusNode { @override bool get hasFocus => false; } then in your function try this:onPressed: () asy...

Tags: Flutter, Solution

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textTheme not set to text style flutter?

It may be due to the context not having the updated ThemeData when it’s being used. In Flutter, the context in the widget tree doesn’t immediately have access to the changes above it. When you use bui...

Tags: Flutter

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Flutter - why do they instantiate the class and then throw that instance away?

CounterService._internal(); Is a private named constructor that creates an object and can be called only within the class (privacy). factory CounterService.instance() => _instance; Is a public named...

Tags: Flutter, dart, service

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Flutter - How to replace a child Widget with state?

The problem is you are using the same widget for the second time and since you are setting the color inside the initState, the value won't be changed. You have options like creating a new StatefulWidg...

Tags: Flutter

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Android - How to get success or error data without folding the response while using fpdart in flutter?

I mostly create extension for this. extension EitherExt on Either { ///! use only after checking the type get asLeft => (this as Left).value; get asRight => (this as Right).value; } And you can...

Tags: android, Flutter, dart

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Adding a Future<String> to a NotifierProvider in flutter app?

Instead of Future clientId= firestoreService.saveNewClient(toMap(newClient); Await the future use this to get the unboxed future: String? clientId = await firestoreService.saveNewClient(toM...

Tags: Flutter, dart

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How to form a regex for a double quote that may or may not exist (Flutter)?

I believe flutter is Dart, which uses JavaScript regex specification, yes? Use capture groups in this way: boundary=("?)(.*)(\1) Group 1 will capture a quote if there is one. Group 2 will capture you...

Tags: regex, Flutter

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