Reactive Programming

Reactive Programming Talk @DevCon Yangon 2016. Reactive Programming explained with real world examples written in Java including Capturing Double Click, Loading Network and Cache Data and implementing AutoComplete Search

Transcript

1. Reactive
   Programming
   Aung Kyaw Paing
   

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2. A little bit about myself
   • 2 years in Android Development
   • Have released a couple of apps
   • Android Dev at Nex
   • Final year CS student
   

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3. What’s Reactive Programming?
   

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4. What’s Reactive Programming?
   Reactive programming is programming with
   asynchronous data streams.
   Source : https://gist.github.com/staltz/868e7e9bc2a7b8c1f754
   

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5. What’s Reactive Programming?
   Reactive programming is programming with
   asynchronous data streams.
   Source : https://gist.github.com/staltz/868e7e9bc2a7b8c1f754
   

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6. Capturing Double Click
   Step 1 : Capture click events in a stream
   Step 2 : Group click events within a time period
   Step 3 : Count the grouped click events in each
   time period
   Step 4 : Filter groups that contains 2 or more clicks
   

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7. Capturing Double Click
   Source : https://gist.github.com/staltz/868e7e9bc2a7b8c1f754
   

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8. Buffer
   Bundles data emitted by an observable within a
   time period and emit this bundle instead of the
   original data
   

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9. Map
   Transform data emitted by an observable using a
   function
   

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10. Filter
    Emit data if and only if it passes a test
    

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11. Capturing Double Click
    

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12. Capturing Double Click
    

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13. Meet ReactiveX
    An API for asynchronous programming
    with observable streams
    http://reactivex.io/
    

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14. Meet ReactiveX
    Observable
    Observer
    

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15. Why Rx?
    

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16. Why Rx?
    Source : http://jakewharton.com/exploring-rxjava-2-for-android/
    

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17. Why Rx?
    

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18. Why Rx?
    

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19. Why Rx?
    

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20. Why Rx?
    

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21. Why Rx?
    

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22. Why Rx?
    

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23. Why Rx?
    

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24. Real World Example
    • Handling Network and Cache Data
    • AutoComplete Search
    

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25. Handling Network And Cache Data
    

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26. MergeDelayError
    Combine multiple observable of same type into
    one observable
    

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27. Handling Network And Cache Data
    

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28. Handling Network And Cache Data
    

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29. Handling Network And Cache Data
    

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30. Concat
    Combines multiple observable but respect the
    order in which the observables are subscribed
    

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31. Handling Network And Cache Data
    

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32. Publish
    Makes a observable connectable
    

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33. TakeUntil
    Discard data emitted by a observable after a second
    observable emits it first data or terminates
    

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34. Handling Network And Cache Data
    

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35. AutoComplete Search
    

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36. Debounce
    Emits only if the observable after a period of time
    have passed without emitting a data
    

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37. Flatmap
    Transform data emitted from an observable into
    another observable of different type
    

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38. Holy Trinity of RxConversation
    map
    R => T
    flatMap
    R => Observable
    compose
    Observable => Observable
    

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39. AutoComplete Search
    

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40. AutoComplete Search (flatmap)
    

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41. Concatmap
    Transform data emitted from an observable into
    another observable of different type but it respects
    the order
    

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42. AutoComplete Search
    

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43. AutoComplete Search (concatmap)
    

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44. Switchmap
    Switchmap works like Concatmap but it will
    immediately unsubscribe to pervious items
    emitted from the stream as soon as an observable
    emits an item into the stream
    

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45. AutoComplete Search
    

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46. AutoComplete Search (switchmap)
    

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47. Suggested Links
    The Introduction to Reactive Programming You’ve been missing
    https://gist.github.com/staltz/868e7e9bc2a7b8c1f754
    Exploring RxJava 2 for Android
    http://jakewharton.com/exploring-rxjava-2-for-android/
    Learning Rx by example Part 1 & 2
    https://www.youtube.com/watch?v=k3D0cWyNno4
    https://vimeo.com/190922794
    Rx-Android-Samples
    https://github.com/kaushikgopal/RxJava-Android-Samples
    Rxify Series
    https://medium.com/@ragdroid
    

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48. Question Time
    

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