Intro to Reactive Java on Android

Presented on Jogja.APK #1 Meetup

Transcript

1. Intro to Reactive Java on Android Akhyar Amarullah http://github.com/akhyrul
2. Reactive Programming Programming paradigm around data flows and the propagation of change
3. RxJava https://github.com/ReactiveX/RxJava • Java VM implementation of Reactive Extension. • Reactive Extension is a library for composing asynchronous process using observable sequences
4. Observable
5. "Why RxJava?" • Avoid callback hell • Easy compose and transform async processes. Chaining, combining, filtering, etc • Sane error handling • It's cool :p
6. Avoid Callback Hell We hate it :|
7. How about this?
8. Usage example on Android apps • Combining several REST API calls together.
 e.g. all blog posts + author detail + comment list • Chaining several sequential processes.
 e.g. Mobile login process: 1. Send username/password to request access token from web service 2. Cache access token to local DB for further requests 3. Get user profile and preferences from web service and cache it
9. More trivial usage examples • Offloading heavy blocking process to new thread and show the result in UI thread. • To get rid of that annoying AsyncTask • Giving some delay when showing splash screen :p
10. Show me the code!
 compile 'io.reactivex:rxandroid:+'
11. Thanks akhyrul@gmail.com about.me/akhyar