AsyncStateNotifier<T> class

A ChangeNotifier that drives a single async operation and exposes its result as an AsyncState.

Manage any single async operation (e.g. an API call) without writing loading/error/data boilerplate yourself:

final notifier = AsyncStateNotifier<User>();

// Starts the operation; moves state through loading → data / error.
await notifier.run(() => userRepository.fetchProfile());

// Listen in the UI:
ListenableBuilder(
  listenable: notifier,
  builder: (_, __) => AsyncBuilder(
    state: notifier.state,
    data: (user) => Text(user.name),
  ),
);
Inheritance

Constructors

AsyncStateNotifier()

Properties

hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
state → AsyncState<T>
The current state of the async operation.
no setter

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
refresh(Future<T> operation()) → Future<void>
Executes operation while preserving the current value as visible data.
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
reset() → void
Resets the state back to AsyncLoading.
run(Future<T> operation()) → Future<void>
Executes operation, transitioning through: loading → data on success, or loading → error on failure.
setData(T value) → void
Directly sets the state to AsyncData with value.
setError(Object error, [StackTrace? st]) → void
Directly sets the state to AsyncError with error and optional st.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited