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

# Declarative approach
As mentioned earlier in [RxJava Core Components](https://www.educative.io/courses/reactive-programming-rxjava/operator), using an operator should be kept single-purposed. If multiple transformations need to be applied to an emission, each transformation should be encapsulated in its own operator. This approach is **declarative**, or in other words, it describes _what_ should be done, not _how_ it should be done. This aids in readability.


As such, we might find ourselves repeating the same chain of operators in parts of our codebase. For example, say it was a very common action in one of our classes to filter by some condition, skip the first filtered item, and follow that by taking the first result after skipping:

Learn about the repetition of operator chains in parts of our codebase.

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

Reusing Operator Chains

Declarative approach

Repeating operator chains