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Asynchronous Android Programming

You're reading from   Asynchronous Android Programming Unlock the power of multi-core mobile devices to build responsive and reactive Android applications

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Product type Paperback
Published in Jul 2016
Publisher Packt
ISBN-13 9781785883248
Length 394 pages
Edition 2nd Edition
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Authors (2):
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Helder Vasconcelos Helder Vasconcelos
Author Profile Icon Helder Vasconcelos
Helder Vasconcelos
Steve Liles Steve Liles
Author Profile Icon Steve Liles
Steve Liles
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Table of Contents (14) Chapters Close

Preface 1. Asynchronous Programming in Android FREE CHAPTER 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

Posting sticking events

Whenever we publish an event on the bus, the EventBus broker automatically delivers the event to all the current subscribers, and by default, will immediately clear the transient event. The new subscribers that register after the event is delivered to the current subscribers will not get the event.

There are situations when a new subscriber registers on the bus and no new event is produced or submitted on the Bus for a long period of time. As such, the subscriber will wait until the next event appears on the bus to produce any output from it.

Furthermore, when the new subscriber is responsible for updating an Android UI component like an Activity or a Fragment, the subscribers have to wait for a new event to occur, hence, it might delay the UI update for a significant amount of time.

To solve this problem, the EventBus allows us to create Sticky events that are kept in the memory and delivered to subscribers once they register on the Bus. EventBus will keep the latest...

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