We have already learned how to concatenate multiple Observables or append specific values to an emitting sequence. RxJava's startWith()
is the counterpart of concat()
. As concat()
appends items to the ones emitted by an Observable, startWith()
emits a sequence of items, passed as a parameter, before the Observable starts emitting their own items, as shown in the next figure:
RxJava Essentials
By :
RxJava Essentials
By:
Overview of this book
<p>RxJava—Reactive Extensions for the JVM—is a library for composing asynchronous and event-based programs using Observable sequences for the Java VM, which will help you beat Android platform limitations to create astonishing Android apps.</p>
<p>Starting with some quick background information on the Rx .NET library, this book quickly moves on to your first example. You will understand Observables and learn to filter, transform, or merge them in detail. Next, you will learn how to get rid of Threads, AsyncTasks, and Handlers with Schedulers to create a smooth user experience. Develop an easy, ready-to-go approach to REST API communications and enrich your skills by working with new challenging examples.</p>
<p>By the end of the book, you will have explored the reactive programming world and will have created your first Android app without having to think about threading, networking, concurrency, and collection management.</p>
<p>The images have been taken from <a href="http://reactivex.io/" target="_blank">http://reactivex.io/</a> which is licensed under a Create Commons 3.0 Attribution license (<a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a>)</p>
Table of Contents (15 chapters)
RxJava Essentials
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
RX – from .NET to RxJava
Why Observables?
Hello Reactive World
Filtering Observables
Transforming Observables
Combining Observables
Schedulers – Defeating the Android MainThread Issue
REST in Peace – RxJava and Retrofit
Index
Customer Reviews