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Questions tagged [flutter-state]

369 questions
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Flutter periodic refresh and popping all other page caused error

I have an ArticlesPage widget, which has a periodic timer to route the same page again. This is a way to pull in new articles from external API. To avoid having too many pages in the screen stack, I pop all other pages using…
user1187968
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Flutter - how to avoid reloading Google Maps between routes?

I have Google Maps on several routes of my app. Would there be away to avoid reloading the Google Map on a new route? I was thinking of doing away with routes, and using a big Stack, with Google Maps on the bottom, and just switching on and off…
giorgio79
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Can a StatelessWidget contain member variables?

I have a StatelessWidget that uses a ScopedModel to store its data. The widget basically presents a list of checkboxes and some buttons to save the state of the checked boxes. Now I want to keep track of if the user has altered any of the…
Magnus
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How to redraw entire widget tree with different argument?

I have a button on pressed method that does some async task. At the end of this task, I need to redraw the entire widget with new updated arguments. This is my Widget Class. class UIMain extends StatefulWidget { final bool loginState; final…
GunJack
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StatefulWidgets in ReorderableListView don't keep their state when reordering the list

Here I have a trimmed down page which creates a ReorderableListView, which has its body set to two RecipeStepWidgets with UniqueKeys set (I've also tried this with ValueKey and ObjectKey) import 'package:flutter/material.dart'; import…
CyanBlob
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flutter share state across multiple instances of a widget

In my flutter app, I have a ConnectivityStatus widget which displays the current connection status of the app to my raspberry pi. In the initState of my widget, I subscribe to a timer to check the connection every 5 seconds and update the state…
John Schlachtenhaufen
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The Flutter app crashes when navigating to the new screen by clicking the list item on the FancyBottomNavigation tab screen

I am rebuilding an application that has already been developed with native Android using Flutter. I'm new to Flutter and Dart. But, I staying in my previous UI with minimal changes. However, so far everything has been well done with browsing. So,…
SUDESH KUMARA
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Why does a child state of StatefulWidget doesn't get reset when constructor parameter changes?

I have a custom widget class: class FancyButton extends StatefulWidget { final Function() onTap; final String text; final IconData icon; bool enabled; FancyButton({this.onTap, this.text, this.icon, this.enabled = true}) @override …
Gintas_
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Can I use RefreshIndicator in Stateless flutter widget?

I'm fetching some json data from the internet and displaying in a listview builder inside a stateless widget Now I want to refresh the data using RefreshIndicator. Do I need a stateful widget for this or can I manage to do this with a stateless…
user730376
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Provider/ChangeNotifier: Set state after Widget is build

Im using the Provider/ChangenNotifier Pattern to handle state as described in the official docs. I have a state field which I want to set after a Widget is build. However if I try to set in in the build method. I get an Error: setState() or…
yN.
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Preserve page state while using Navigator

I have a PageView( ) displaying four different pages and a BottomNavigationBar used to navigate to those pages. I have a FloatingActionButton on the first page when I use Navigator.push() to push the second route and Navigator.pop to pop it out the…
sameer kashyap
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how to call setState inside FutureBuilder>in flutter

I am trying to call setState inside a ListView.builder which itself is inside a FutureBuilder FutureBuilder>( future: BidRepository().bidsTrucker('new'), builder: (context, snapshot) { if (!snapshot.hasData) { …
T.MUHAMMED SHIJAS
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Widget builded with null value from api call in initState

I'm having trouble displaying the result of api call in widget. I'm getting "Unexpected null value" error. From some reasons I don't want to use FutureBuilder in this case. With FutureBuilder everything is ok. class Album { final int userId; …
woywie87
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Flutter state, update content based on bottom navigation bar item's index

I'm building a flutter application, and at some point, i had to add a bottom Sheet so i used "showModalBottomSheet". and i wanted also to show a navigation bar inside it, so i added a customized widget of a "BottomNavigationBar", and now i want to…
Aymen ahmed Houasnia
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How to display data in real time

I have a payment list that I need to import from a subcollection included in a payments collection and display it in real time. I use the stream to get a real-time change in the display of my data obtained from the firebase. Unfortunately, it didn't…
Chatti
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