Questions tagged [flutter-riverpod]
166 questions
1
vote
2 answers
Why Riverpod provider goes into the loading state when there's already value?
Minimum reproducible code:
class FooPage extends ConsumerWidget {
@override
Widget build(BuildContext context, WidgetRef ref) {
final asyncValue = ref.watch(provider1);
print('loading: ${asyncValue.isLoading}, value:…
iDecode
- 22,623
- 19
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1
vote
1 answer
flutter_riverpod - Accessing a `Ref` when `context` is available
I'm in the process of migrating my app to use flutter_riverpod package. At the moment, my app is using provider package to manage/deal with app state.
I have a lot of static methods inside multiple utility classes that take a BuildContext as input.…
zepolyerf
- 1,098
- 3
- 16
- 35
1
vote
1 answer
How can I update state notifier(riverpod) from Go router state.params
The pagebuilder in GoRoute has the the only place I can grab the state.params, I want to update my StateNotifier when the route changes if it is different.
final LibraryRoutes = Provider((ref) {
return ShellRoute(
navigatorKey:…
Raymond Alexander
- 11
- 1
1
vote
1 answer
How to solve the infinite loop problem in Flutter?
I get the following error in the terminal (not the debug console because I'm running flutter run -d chrome --web-hostname localhost --web-port 7357 command):
══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY…
My Car
- 4,198
- 5
- 17
- 50
1
vote
1 answer
How to change provider state within itself?
Minimal reproducible code:
final provider = StateProvider((ref) {
Timer? _timer;
ref.listenSelf((_, flag) {
if (!flag) {
_timer = Timer(Duration(seconds: 5), () {
ref.read(this).state = true;
});
}
});
//…
iDecode
- 22,623
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- 186
1
vote
0 answers
using ChangeNotifier to add items into empty list
I already have data stored on firestore , but now i'd like to add this data into an empty list using ChangeNotifier , similar to this example -https://docs.flutter.dev/development/data-and-backend/state-mgmt/simple .
so below i'd like to add data…
hayek
- 33
- 4
1
vote
1 answer
Flutter/Riverpod with service and respository - how to
I am building my first RiverPod based Flutter app, and I'm trying to understand how RiverPod works with the service and repository pattern.
I have a repository class that owns the task of handling interactions with a particular storage API, in this…
user2868835
- 1,250
- 3
- 19
- 33
1
vote
1 answer
How do I fix the error about a widget being unmounted so the State no longer has a context in Flutter?
I get an error. Here is the debug console:
════════ Exception caught by scheduler library ═════════════════════════════════
This widget has been unmounted, so the State no longer has a context (and should be considered…
My Car
- 4,198
- 5
- 17
- 50
1
vote
3 answers
Is there a way to call a method of another class in Flutter?
I am passing the method as follows But it is very complicated. I want to call methods directly without passing methods. Is there any way to do that?
class Parent extends StatelessWidget {
const Parent({Key? key}) : super(key: key);
@override
…
Ganessa
- 782
- 2
- 7
- 24
1
vote
2 answers
Riverpod 2.0: override with value does not exist anymore
I have a provider named gameControllerProvider extends with ChangeNotifier, I initialize it first throw UnimplementedError.
final gameControllerProvider =
ChangeNotifierProvider((ref) => throw UnimplementedError());
In my…
Mosh Mobile Software Engineer
- 217
- 3
- 12
1
vote
0 answers
Flutter riverpod listen to ChangeNotifierProvider
In this code i have a simple riverpod provider which that should connect and listen to events. here connect to pusher work fine and i can receive data from that and printing in logcat, but i can't listen to that in defined provider into screen
final…
DolDurma
- 15,753
- 51
- 198
- 377
1
vote
1 answer
What should build() return after it realizes a need for a state change?
I think I'm missing something about the Riverpod philosophy.
I'm keeping all my game state in a ChangeNotifier, including the .stage which can be "start", "playing", "winning", etc:
final ChangeNotifierProvider gameStateProvider =
…
Michael Gundlach
- 106,555
- 11
- 37
- 41
1
vote
3 answers
Riverpod: Is it wrong to refer in onPressed to a provider obtained earlier by ref.watch?
Riverpod docs say to use ref.read in callbacks like a button's onPressed, since you must not use ref.watch there.
Is it OK to do something like this?
build(context, ref) {
// Use ref.watch ahead of time, because I refer to p all over
// the…
Michael Gundlach
- 106,555
- 11
- 37
- 41
1
vote
2 answers
using ref.read inside build method for StateControllers
As per the Riverpod documentation, asynchronously we use ref.read such as inside a function and for synchronous code, we use ref.watch such as inside the build method.
Once I press a button, the function with ref.read will fire up and it will be for…
Anmol Singh
- 393
- 3
- 16
1
vote
3 answers
How to get the previous value of a provider in Riverpod?
The code below takes user input, and prints it in the upper case after a delay of 1s.
Minimal reproducible code:
class FooPage extends ConsumerWidget {
@override
Widget build(BuildContext context, WidgetRef ref) {
final asyncValue =…
iDecode
- 22,623
- 19
- 99
- 186