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Questions tagged [statelesswidget]

121 questions
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For creating common widgets, which one is best Statless, stateFull or simple function with named params?

If a widget has the same style all over the project. We make it common so that we can easily use that with a minimal number of lines. But which one should I use to create a common widget. Let's assume I have a text widget and text form field widget…
Senthur Kumaran
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How to call two widgets separately from StatelessWIdget that is in another dart file

So I am new to Flutter and I want to make a simple scoreboard with its timer and everything. The problem is that I got two files screen_result and time. In screen_result I have a screen and buttons to operate the scoreboard, in time I have a…
Robert Tomic
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Trying to build a future context but my build method has an error

I have this code and the problem is that: 'ProfileView.build' ('Future Function(BuildContext)') isn't a valid override of 'StatelessWidget.build' ('Widget Function(BuildContext)'). I tried to remove future but it doesn't work, any…
arrow
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Flutter - The non-nullable local variable 'newTaskTitle' must be assigned before it can be used

Hi so I have been getting this error - "The non-nullable local variable 'newTaskTitle' must be assigned before it can be used. (Documentation) Try giving it an initializer expression, or ensure that it's assigned on every execution path." while…
Kaustubh Ghude
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i have a problem in flutter i dont have any idea i try all methods

vs wrong android studio wrong it is my first wrong i installed flutter but i am getting errors like this i got my error about java installed sdk installed sdk i have no idea i am waiting for your help virtual studio code say Exception: Build process…
Sarx
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Flutter - How to put this string code into stateless widget or stateful widget?

Example 1 Can someone show me how to add this Example 1 to stateless or stateful widget in Flutter?
Joe Joe
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How to create slightly varying widgets from a single base class based on two parameters in Flutter?

Is it possible to create slightly varying instances of a class based on two parameters A and B so that If A and B are present --> create instance variation AB If A and not B are present --> create instance variation A If not A and B are present -->…
zaplec
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Flutter same constructor parameters for different widgets

I created two buttons but they have common constructor parameters. I don't want to write same parameters again. I want to call all buttons' parameters from mixin or class. My buttons below: Custom text button: class HTextButton extends…
emowise
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How can I make separate color and button stateless and stateful classes for this code in flutter?

I would like to make an extra file 'extra.dart' where I would like to add my top container and the four TextButtonWidgets. 1 ColorWidget, 4 TextButtonWidgets with each one having colorwidget as their child. I would name the top container widget…
giannik28
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How to hide a container inside the stateless widgets?

I am building a chatbot using flutter. I have listview of buttons inside a container. If the user presses any button, the container must disappear. I tried with a boolean variable but nothing changes as we cannot alter the state. I cannot change the…
ramya
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Flutter streambuilder does not update a statefulwidget or statelesswidget

I'm trying to build a streambuilder. My problem is that the streambuilder does not update other statefulWidgets inside the streambuilder widget. Here my code: class ChatPage extends StatefulWidget { //pass parm var chat_object; …
user16754196
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By adding the void function it donot calls the build method of the statlessWidget

whenever I create void function the build method of stateless widget is not called due to which further methods are also not called. Kindly guide with the possible solution. import 'package:flutter/material.dart'; class TaskTile extends…
Usama Bin Tahir
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flutter, next page with a variable controller

Excuse me guys, i tryin to build a new page, but with variable "nextcode" in it. so in the new page, it will show nextcode text onTap: () { Navigator.push( context, …
Silent Roar
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How can I pass flutter textediting controller value from one stateless widget to another stateless widget

Here Is the main.dart file: import 'package:flutter/material.dart'; import 'package:untitled/button.dart'; import 'package:untitled/form.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget…
S.n. Ahad
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Stateful issues with widgets -- update from parent and update from inside

This is going to be way too long but I don't know where the problem is/what to do. Updated: The values track properly if I use a StateLessWidget instead; so... Purpose At its core, I envisioned my TouchPoint to be a button that if tapped and…
ThorMJ
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