Why reactive programing matter, and how PicCollage adaptive it.

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PRADA Hsiung

Talk about how Piccollage adaptive the reactive programming in Android Taipei at 2018/04/25

Technology

導入反應式編程的⼼心路路歷程
Android Developer - PicCollage
Prada
Why reactive programing matter, and how PicCollage adaptive it.

Why Reactive
Programming matters?
https://www.youtube.com/watch?v=v68ppDlvHqs
1. Deal with Threading right is matters
2. Architecture also need to be reactive.

Our World is shifting
Blocking -> Non-Blocking
Computer -> User

I was join PicCollage in 2013
we have over 30 Customized AsyncTask Classes

Deferred-Promise Pattern
is Popular
we tried jDeferred and Bolts-Framework
https://github.com/jdeferred/jdeferred
https://github.com/BoltsFramework

We went to Android SF
Meetup in 2016
https://tech.pic-collage.com/android-meetup-in-san-fransisco-e1e8dde1554c

Implement thread in
RxJava
https://tech.pic-collage.com/android-meetup-in-san-fransisco-e1e8dde1554c

https://youtu.be/XLH2v9deew0?t=4m51s
Asynchronous Ideas
1. Explicit execution
2. Easy thread management
3. Easily transformable
4. As few side effect as possible
5. Cancelation

Trending : Make Model/
State be reactive

Google try to move to
MVVM pattern
https://developer.android.com/topic/libraries/data-binding/index.html

Android Architecture
Component
https://developer.android.com/topic/libraries/architecture/index.html

Trending : isolated Android
framework dependency

Android Dev Hates
Activity/Fragment LifeCycle

Your Code might looks like
MyActivity.java
Takes View’s Input
Update Views
Control Logic
Data/Model
MVC⼀一家親

Your Code might looks like
MyActivity.java
Takes View’s Input
Update Views
Control Logic
VC⼀一家親
MyContentProvider.java
Data/Model

Model-View-Presenter
MyActivity.java
Takes View’s Input
Update Views
MyContentProvider.java
Data
MyPresenter.java
Control Logic
IView.java IPresenter.java

Trending : Controller
need to be reactive

You might want your
controller looks like

In the end, Your code will be
https://www.youtube.com/watch?v=0IKHxjkgop4

Adoption steps from
PicCollage
1. UI interaction
2. Threading mechanism
3. Make Data Layer API be reactive
4. Make Controller be reactive

UI interaction
https://github.com/JakeWharton/RxBinding

Data Layer API be reactive
Note : some case you need to use Subject to achieve this goal
https://github.com/ReactiveX/RxJava/wiki/Subject

Take away
1. Learn from web developers(Flux, Redux, MVI)
2. Review your threading code
3. Reactive Programming has high learning curve
4. Follow our adoption steps

Reference
Intro to RxJava/ Christina Lee
https://www.youtube.com/watch?v=XLH2v9deew0
Dynamics of change: why reactivity matters/ Andre Staltz
https://www.youtube.com/watch?v=v68ppDlvHqs
Managing State with RxJava/ Jake Wharton
https://www.youtube.com/watch?v=0IKHxjkgop4

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Why reactive programing matter, and how PicCollage adaptive it.

1. 導入反應式編程的⼼心路路歷程 Android Developer - PicCollage Prada Why reactive programing matter, and how PicCollage adaptive it.

2. Why Reactive Programming matters? https://www.youtube.com/watch?v=v68ppDlvHqs 1. Deal with Threading right is matters 2. Architecture also need to be reactive.

3. Old World

4. You Code shouldn’t like this

6. Our World is shifting Blocking -> Non-Blocking Computer -> User

7. Developer suffering from Threading

8. I was join PicCollage in 2013 we have over 30 Customized AsyncTask Classes

9. Deferred-Promise Pattern is Popular we tried jDeferred and Bolts-Framework https://github.com/jdeferred/jdeferred https://github.com/BoltsFramework

10. We went to Android SF Meetup in 2016 https://tech.pic-collage.com/android-meetup-in-san-fransisco-e1e8dde1554c

11. Implement thread in RxJava https://tech.pic-collage.com/android-meetup-in-san-fransisco-e1e8dde1554c

12. https://youtu.be/XLH2v9deew0?t=4m51s Asynchronous Ideas 1. Explicit execution 2. Easy thread management 3. Easily transformable 4. As few side effect as possible 5. Cancelation

13. Architecture also need to be reactive

14. Trending : Make Model/ State be reactive

15. Google try to move to MVVM pattern https://developer.android.com/topic/libraries/data-binding/index.html

16. Android Architecture Component https://developer.android.com/topic/libraries/architecture/index.html

17. Trending : isolated Android framework dependency

18. Android Dev Hates Activity/Fragment LifeCycle

19. Your Code might looks like MyActivity.java Takes View’s Input Update Views Control Logic Data/Model MVC⼀一家親

20. Your Code might looks like MyActivity.java Takes View’s Input Update Views Control Logic VC⼀一家親 MyContentProvider.java Data/Model

21. Model-View-Presenter MyActivity.java Takes View’s Input Update Views MyContentProvider.java Data MyPresenter.java Control Logic IView.java IPresenter.java

22. Trending : Controller need to be reactive

23. You might want your controller looks like

24. In the end, Your code will be https://www.youtube.com/watch?v=0IKHxjkgop4

25. Adoption steps from PicCollage 1. UI interaction 2. Threading mechanism 3. Make Data Layer API be reactive 4. Make Controller be reactive

26. UI interaction https://github.com/JakeWharton/RxBinding

27. Threading mechanism Before After

28. Data Layer API be reactive Note : some case you need to use Subject to achieve this goal https://github.com/ReactiveX/RxJava/wiki/Subject

29. Controller be reactive

30. Take away 1. Learn from web developers(Flux, Redux, MVI) 2. Review your threading code 3. Reactive Programming has high learning curve 4. Follow our adoption steps

31. Thanks, Question?

32. Reference Intro to RxJava/ Christina Lee https://www.youtube.com/watch?v=XLH2v9deew0 Dynamics of change: why reactivity matters/ Andre Staltz https://www.youtube.com/watch?v=v68ppDlvHqs Managing State with RxJava/ Jake Wharton https://www.youtube.com/watch?v=0IKHxjkgop4

Why reactive programing matter, and how PicCollage adaptive it.

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