Gain insights into RxJava's principles, explore its integration into Android, and discover why it’s the leading reactive library for enhanced app development.

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RxJava

Since its inception in 2012, RxJava has slowly gained in popularity for enabling reactive programming on Android. It is now deemed as the go-to and leading reactive library. Many companies have adopted the reactive way of programming, including Google, with its release of Android Architecture Components, which has many reactive elements in its design.

In this course, you will learn the fundamental principles of RxJava which will serve as a foundation for experienced Android developers who are new to the library and want to start integrating it into their apps.

Reactive Programming with RxJava

## Propagating errors to the Observer
As we've seen earlier, one of the events an `Observer` can receive is the `.onError(Throwable)` event. The `.onError()` notification is considered a terminal such that once triggered, the `Observable` will no longer emit any other event. There are several ways to invoke the `.onError()` notification. Some are explicit, such as invoking the `.onError()` on an `Emitter`:



# Propagating errors to the Observer
As we've seen earlier, one of the events an `Observer` can receive is the `.onError(Throwable)` event. The `.onError()` notification is considered a terminal such that once triggered, the `Observable` will no longer emit any other event. There are several ways to invoke the `.onError()` notification. Some are explicit, such as invoking the `.onError()` on an `Emitter`:



Learn about the various ways in which errors are propagated to the Observer.

Getting Started

Part 1: RxJava Basics

Reactive Programming

RxJava Core Components

Operators

Multithreading

Part 2: RxJava Advanced

Reactive Modeling on Android

Backpressure

Error Handling

Conclusion

Errors Along the Chain

Propagating errors to the Observer