RxJava

rx
Interface Observer<T>

Type Parameters:

T -

All Known Implementing Classes:

AsyncSubject, BehaviorSubject, ChunkedOperation.ChunkObserver, PublishSubject, ReplaySubject, SafeObserver, Subject, SynchronizedObserver

public interface Observer<T>

Provides a mechanism for receiving push-based notifications.

After an Observer calls an Observable's Observable.subscribe method, the Observable calls the Observer's onNext method to provide notifications. A well-behaved Observable will call an Observer's onCompleted closure exactly once or the Observer's onError closure exactly once.

For more information see the RxJava Wiki

Method Summary

void	onCompleted() Notifies the Observer that the Observable has finished sending push-based notifications.
void	onError(java.lang.Throwable e) Notifies the Observer that the Observable has experienced an error condition.
void	onNext(T args) Provides the Observer with new data.

Method Detail

onCompleted

void onCompleted()

Notifies the Observer that the Observable has finished sending push-based notifications.

The Observable will not call this closure if it calls onError.

onError

void onError(java.lang.Throwable e)

Notifies the Observer that the Observable has experienced an error condition.

If the Observable calls this closure, it will not thereafter call onNext or onCompleted.

Parameters:

e -

onNext

void onNext(T args)

Provides the Observer with new data.

The Observable calls this closure 1 or more times, unless it calls onError in which case this closure may never be called.

The Observable will not call this closure again after it calls either onCompleted or onError.

Parameters:

args -