Code example for "The ABCs of RxJava" talk.
It contains different ways of creating RxJava Observables:
- from a static list - where every element of the list will be an emission of an
Observable - from a file - where every line of the file will be an emission of an
Observable - from click events, with the help of
Subjects - from multiple
Observables
Following the burger example from "The ABCs of RxJava", the slices of tomatoes are created from a static list,
the buns from file, the meat from click events and the burgers by ziping the tomato, meat and bun Observables.
Also, examples of manipulating a stream of data using the filter, map and flatmap operators are given.
The code follows the Model-View-ViewModel architecture pattern:
- the view is the
BurgerActivity. - the view model is the
BurgerViewModel- it exposes the tomato, bun and burger stream of data to the view and allows the view to notify about new pieces of raw meat available. The view model gets the tomato and bun streams of data from the data model. The view model also creates the burger stream of data. - the data model is the
DataModel- it creates the stream of tomato slices based on a list of tomatoes and the stream of buns base on the number of lines in a file that contain the word "bun".
To showcase the testability of RxJava, unit tests for the BurgerViewModel class are provided.