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Asynchronous Android Programming - Second Edition

You're reading from  Asynchronous Android Programming - Second Edition

Product type Book
Published in Jul 2016
Publisher Packt
ISBN-13 9781785883248
Pages 394 pages
Edition 2nd Edition
Languages
Author (1):
Steve Liles Steve Liles
Profile icon Steve Liles

Table of Contents (19) Chapters

Asynchronous Android Programming Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
1. Asynchronous Programming in Android 2. Performing Work with Looper, Handler, and HandlerThread 3. Exploring the AsyncTask 4. Exploring the Loader 5. Interacting with Services 6. Scheduling Work with AlarmManager 7. Exploring the JobScheduler API 8. Interacting with the Network 9. Asynchronous Work on the Native Layer 10. Network Interactions with GCM 11. Exploring Bus-based Communications 12. Asynchronous Programing with RxJava Index

Removing sticky events


In some use cases, it could be convienient to invalidate a sticky event from the Bus and prevent a cached event from getting delivered to the following Subscribers. EventBus allows us to clear the sticky events by calling the following functions:

  • removeStickyEvent(<MyEventClass>) – Removes and gets the recent sticky event for the given event type

  • removeStickyEvent(Object event) - Removes the sticky event if it equals the passed event

  • removeAllStickyEvents() - Removes the sticky events for all types

Let's use one removeStickyEvent function to remove the latest sticky LocationEvent from the bus:

// Check if the sticky event exist on the Bus  
LocationEvent evt = EventBus.getDefault().
                        getStickyEvent(LocationEvent.class);
// Check if the event is null
if ( evt != null) {
  EventBus.getDefault().removeStickyEvent(stickyEvent);
}

After we remove the sticky event from the bus, the latest LocationEvent will be removed from the bus and no event...

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