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Questions tagged [statefulwidget]

339 questions
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FutureBuilder load API data only once

I've called post type api to load data asynchronously on ListView using FutureBuilder but it called only once, I want to display infinite data loading on my ListView. Is their I missing to add some properties of FutureBuilder or ListView. Can anyone…
Dharini
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Flutter: How to pass the state from/to Custom Dialog Widget to another screen and back?

I have a container on my page which should have either image or text depending on the one that is given in the Custom Dialog widget. I have created this widget in a separate Stateless Class. I am calling this from the page where my container is…
Sri
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StatefulWidget using BlocBuilder doesn't rebuild on state change

I'm using Flutter (BloC pattern) to build a widget that streams multiple camera feeds. When a feed is clicked on, it is shown in the main feed (think Google hangouts, where the face of whoever is speaking is shown front and centre, and others are…
Jared Baribeau
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Flutter FutureBuilder returning null data

I'm new to Flutter and Dart, and I'm trying to write a application to test it. I have an api that I'm getting the data for the app, and was trying to use the StatefulWidget and the FutureBuilder. When I run the method to call the api I have the…
guren
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setState() within StatefulWidget not working properly

The thing I'm trying to do is, to change the colour of a RawMaterialButton when the button is clicked. Read about StatefulWidget and it seemed like it should work, but for some reason it doesn't. flutter: Another exception was thrown: setState()…
Mantas
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Flutter: Pass new values to a Stateful widget and update the view onTap

I have implemented google_maps_fltuter and I need to update the route on the map with new coordinates whenever the user clicks on a different route anywhere within the bordered rectangle (see the picture below). When the view is rendered initially,…
selected
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How to create a Custom Drawer Stateful Widget from the given code?

I have solved the previous issue based on an existing solution to existing question. I want to change the color of CustomListTile which is child of ListView when onTap is clicked, and setting other children color into default one? I am still facing…
Aakash Solanki
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I am building a flutter app, my code was working fine until i got thrown by this exception called "Exception caused by Widgets Library"

when i run my app it probably comes up with a red screen printing invalid Argument(s). I think the problem is with my code, please point out if any or if this is some other problem. I/flutter ( 4556): EXCEPTION CAUGHT BY WIDGETS LIBRARY I/flutter (…
Zeeshan Haris
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Flutter, Inconsistent Widget build

So I have a Form Screen (With its own scaffold) like this : class InputForm extends StatelessWidget { final Receipt initialReceipt; InputForm({this.initialReceipt}){ print("InputForm() called"); } @override Widget build(BuildContext…
erluxman
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Does state as class requires SatefulWidget?

I am trying to learn the bloc pattern in flutter and creating one sample app using bloc framework. The app is a counter and has two buttons beneth the counter text field. Upon clicking on the True and False button currently Ii am just incrementing…
Hunt
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Notify the AppBar from a nested child view flutter dart

I have a MainPage, which has an AppBar, a BottomNavigationBar, and multiple bodies : @override Widget build(BuildContext context) { return new Scaffold( appBar: resourcesBar(), body: _bodies[_selectedIndex], …
Mathieu
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Stateful widget in listview and reloading leads to error

When I make a ListView with an array of stateless widgets I get no errors, everything works perfectly. However when I put Stateful widgets into the array and rerender the widget by scrolling it so it ends outside of the view then I get errors. I…
Nakruf
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Flutter: Only Re-render widget where setState() was called - in nested object structure

How Flutter renders the widgets has been described in detail here. It will compare the new with the old widget. Therefore, Flutter usually knows how to re-render the UI in most cases. In a nested object structure, all parent widgets inevitably…
Markus Bach
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Variable scope within the Flutter StatefulWidget

I'm trying to access the moviesList inside the build() and results as follows. What is the real issue? flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════ flutter: The following…
Faisal
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Updating a stateful widget variable after it has rendered?

I'm using a TabBarView with two tabs that each display a Stateful widget-- Let's call them the Main Widget and the Configuration Widget. The Configuration Widget serves as a 'configuration section' for the Main Widget-- I use it to set things like…
larryq
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