Reactive Programming on Android with RxJava_468 x 60 copy 2.png

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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

## Aggregating
RxJava has several operators that aggregate emissions from an `Observable` to provide an `Observer` with an intended result. Operators that aggregate are typically stateful, since an internal state must be maintained between emissions. A few commonly used aggregation operators are `.toList()`, `.reduce()`, and `.collect()`.
### ToList
The `.toList()` operator converts an `Observable<T>` into an `Observable<List<T>>`. This is useful if the `Observer` ultimately cares about a `List<T>` but the stream itself pushes objects of type `T`.


# Aggregating
RxJava has several operators that aggregate emissions from an `Observable` to provide an `Observer` with an intended result. Operators that aggregate are typically stateful, since an internal state must be maintained between emissions. A few commonly used aggregation operators are `.toList()`, `.reduce()`, and `.collect()`.
## ToList
The `.toList()` operator converts an `Observable<T>` into an `Observable<List<T>>`. This is useful if the `Observer` ultimately cares about a `List<T>` but the stream itself pushes objects of type `T`.


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

Aggregate: ToList, Reduce, and Collect

Aggregating

ToList