RxJava初心者の私が良いと思ったやり方、素敵だと思った資料など

2014/10/28にpixivさんで行われたRxJavaNightの@RyotaMurohoshiの資料です。

※元々はSlideShareで公開していた資料です

1. @RyotaMurohoshi 2014/10/28'RxJava'Night
2. ࢒೦ͳ͕Βɺॳ৺ऀͰ͢ ͝ΊΜͳ͍͞
3. ಥવͰ͕࣭͢໰Ͱ͢ʂ
4. RxJavaͳͲΛ΋͏͢Ͱʹ ΨοπϦ΍͍ͬͯΔํʁ
5. RxJavaɺHello*world ͸ͨ͠Αͬͯํʁ
6. RxJavaΑ͘Θ͔Βͳ͍͚Ͳ ڵຯ͋ΔΑͬͯํʁ
7. ϓϩάϥϛϯάݴޠGroovy ࢖͍ͬͯΔ!or!஌͍ͬͯΔํʁ
8. C#erͳํɺC#෼͔Δํʁ
9. Unity࢖͍ͬͯΔํʁ
10. ͋Γ͕ͱ͏͍͟͝·ͨ͠
11. ͓લͩΕΑ • ໊લ":"ࣨ੕྄ଠ • ࢓ࣄ":"UnityήʔϜ։ൃ(C#)ɺʲલʳAndroidΞϓϦ։ൃ(Java) • Twi6er":"@RyotaMurohoshi • ౤ߘઌ":"h6p:/ /qiita.com/RyotaMurohoshi • ڵຯ":"UnityɺC#ɺGroovy
12. ʲॳ৺ऀ͕΍ͬͯΈͨʳ RxɺνϟϨϯδͯ͠Έͨ ͱ͍͏ςʔϚͰɺ๯಄ͷ࣭໰ʹؔ܎ͷ͋Δ಺༰Ͱ͓ૹΓ͠·͢ɻ
13. ձ৔͕ʮRx͍͢͝ਓͨͪʯ͹͔ΓͩͬͨΒ ΨνযΓ͍ͯ͠·͢ ੜஆ͔͍໨Ͱݟ͍ͯ͋͛ͯͩ͘͞
14. Έͳ͞Μ͸RxJavaΛ஌Γ·ͨ͠ɻ ࢖ͬͯΈ͍ͨͰ͢Ͷɻ ·ͣɺͲ͜Λݟ·͔͢ʁ
15. RxJavaͷwiki h"ps:/ /github.com/Reac3veX/RxJava/wiki
16. RxJavaͷWiki)filterϝιουͷઆ໌ΑΓ h0ps:/ /github.com/Reac<veX/RxJava/wiki/FilteringAObservables) numbers = Observable.from([1, 2, 3, 4, 5, 6, 7, 8, 9]); numbers.filter({ 0 == (it % 2) }).subscribe( { println(it); }, // onNext { println("Error: " + it.getMessage()); }, // onError { println("Sequence complete"); } // onCompleted );
17. Μʁ
18. ͳΜͩ͜Εʁ • [1,%2,%3,%4,%5,%6,%7,%8,%9] • {%0%==%(it%%%2)%} • it • println%("Sequence%Complete")
19. Groovy
20. ʲΑ͍ͱ͓΋ͬͨɺίϨศརʂʳ RxJava࢖͏ͳΒ͹ɺGroovy΋͋Γʂ
21. RxJavaͷwikiͷαϯϓϧίʔυɺ ݁ߏGroovyͰॻ͔Ε͍ͯΔ
22. Groovy • JVMݴޠ • Javaͱͷ਌࿨ੑ͕ߴ͍ • ؆ܿͳهड़΍ॊೈͳॲཧ͕Ͱ͖Δ • Groovy2.4͔ΒAndroidʹରԠ(ࠓbeta63)
23. RxJavaɺΠϯλʔϑΣʔεΛҾ਺ʹͱΔϝιου͹͔ΓͰ͢Ͷ .map(new Func1<OnClickEvent, Integer>() { @Override public Integer call(OnClickEvent clickEvent) { return 1; } }) ແବʹ௕͍ɽɽɽ
24. ແବʹ௕͍ͷ͸ݏͩʂ • Java8ͳΒ͹ϥϜμࣜ • Java8ΑΓલͰ΋retrolambda
25. ແବʹ௕͍ͷ͸ݏͩʂ • Java8ͳΒ͹ϥϜμࣜ • Java8ΑΓલͰ΋retrolambda • Groovy΋͋Γʂ
26. Androidͩͱɺ
27. RxAndroidͱRxJavaɺBu.onΫϦοΫճ਺ΛTextViewʹදࣔ ViewObservable.clicks(findViewById(R.id.button)) .map(new Func1<OnClickEvent, Integer>() { @Override public Integer call(OnClickEvent clickEvent) { return 1; } }) .scan(new Func2<Integer, Integer, Integer>() { @Override public Integer call(Integer acc, Integer current) { return acc + current; } }) .subscribe(new Action1<Integer>() { @Override public void call(Integer clickCount) { TextView textView = (TextView)findViewById(R.id.text_view); textView.setText(clickCount.toString()); } });
28. ௕͍ʂ
29. RxAndroidͱRxJavaͱGroovyɺBu0onΫϦοΫճ਺ΛTextViewʹදࣔ ViewObservable.clicks(findViewById(R.id.button)) .map { 1 } .scan { acc, current -> acc + current } .subscribe { findViewById(R.id.text_view).setText(it.toString()) }
30. ͖ͬ͢Γʂ
31. GroovyͷΫϩʔδϟͰɺͱͬͯ΋͖ͬ͢Γʂ RxAndroid+Groovyͷྫ-h/p:/ /qiita.com/RyotaMurohoshi/items/48bbbecea49591fd20a2 Ϋϩʔδϟͷॻ͖ํ͍Ζ͍Ζ!h#p:/ /qiita.com/RyotaMurohoshi/items/2a30a74c0074e11d0207
32. RxGroovy • RxJavaͷΠϯλʔϑΣʔεΛҾ਺ʹͱΔϝιουͰɺGroovyͷ ΫϩʔδϟΛ౉ͤΔΑ͏ʹ͢Δ΋ͷ • Groovy2.2Ҏ্ͳΒΫϩʔδϟͷ҉໧తͳڧ੍ܕม׵ʹΑΓɺ RxGroovyͳ͠Ͱ΋ΫϩʔδϟΛ౉ͤΔ • AndroidͰGroovy2.4Ҏ্࢖͏ͳΒɺRxGroovyແͯ͘΋OK h"p:/ /qiita.com/RyotaMurohoshi/items/3f1f3cde0e5c6785b2f1
33. GroovyͰɺRxJava͜Μͳ୹͍هड़Ͱ࢝ΊΒΕΔ @Grab(group='com.netflix.rxjava', module='rxjava-core', version='0.20.4') import rx.Observable import rx.functions.Action1 Observable.from("Taro", "Jiro", "Saburo").subscribe { println "Hello $it"}
34. RxJavaʹݶΒͣɺJavaͷϥΠϒϥϦΛνϣϩͬͱࢼ࣌͢ Groovy͸௒ศརͩͱࢥ͍·͢ʂ • Ϋϥεͱ͔mainϝιουͳ͠Ͱ͍͖ͳΓॻ͚Δ(εΫϦϓτ) • GrapeʹΑΓɺΞϊςʔγϣϯҰൃͰϥΠϒϥϦ࢖͑Δ • GroovyShellͰର࿩తʹࢼͤΔ h"p:/ /qiita.com/RyotaMurohoshi/items/99475255e56f8fae712b
35. ʲΑ͍ͱ͓΋ͬͨɺίϨศརʂʳ RxJava࢖͏ͳΒ͹ɺGroovy΋͋Γʂ Ͱͨ͠ʂ
36. ͯ͞ɺRxJava࢖͍͜ͳͤΔΑ͏ʹͳΓ͍ͨͰ͢ΑͶʁ Ͳ͏͠·͠ΐ͏ʁ
37. RxJava&is&a&Java&VM&implementa1on& of&Reac1ve&Extensions:&a&library&for& composing&asynchronous&and&event> based&programs&by&using&observable& sequences. —"RxJavaͷwiki"HomeΑΓ(h1ps://github.com/Reac<veX/RxJava/wiki)
38. Reac%ve'Extensions
39. RxJava͸Reac(ve)Extensions(C#ͷϥΠϒϥϦ)Λجʹ͍ͯ͠Δ RxJavaΛ࢖͍͜ͳ͍ͨ͠ͳΒ͹ Reac%ve'Extensionsͷهࣄɾ౤ߘͳͲͷ৘ใ΋໾ཱͭʂ
40. ʲ͜ͷ৘ใ͕ૉఢʂͱͬͯ΋෼͔Γ΍͍͢ʂʳ Reac%ve'ExtensionsͷࢿྉͰRxͷษڧΛ͠ɺ RxJavaΛ࢖͍͜ͳ͢
41. ΋ͪΖΜJavaͱC#ͷҧ͍͸͋Γ·͢ ϝιου໊͕ҧ͏΍ͭ΋͋Γ·͢(WhereͱfilterɺSelectͱmap)
42. ͦΕͰ΋Rxͷߟ͑ํΛ ཧղ͢Δͷʹ͸ɺ ͱͬͯ΋͍͍ͱࢥ͍·͢ʂ
43. ϓϩάϥϛϯάC#ୈ7൛ 11ষ͸ؙʑRx(Reac(ve*Extensions) ͝ΊΜͳ͍͞ɺ࠷ॳʹ͜ΕಡΉͷ͸ͪΐͬͱͭΒ͔ͬͨͰ͢
44. Reac%ve'Extensions(C#ͷϥΠϒϥϦ)ͷ ૉఢͳϒϩάɾهࣄΛ౤ߘ͞Ε͍ͯΔํୡ͕͍·͢ ͦͷํୡͷϒϩά͸ͱͯ΋෼͔Γ΍͔ͬͨ͢Ͱ͢
45. xin9le͞Μ Rxೖ໳ h"p:/ /xin9le.net/rx/intro
46. xin9le͞ΜͷRxೖ໳ Rxͷೖ໳ɻϓϩάϥϛϯάC#%ୈ7൛ΛಡΉલʹɺͪ͜ΒΛઌʹಡΈ͔ͨͬͨɻ ॳΊʹͪ͜ΒΛಡΉͷ͕ͱͯ΋͍͍ͱࢥ͍·͢ʂ ଞʹεϥΠυ΋ͨ͘͞Μެ։͞Ε͍ͯ·͢ʂ
47. okazuki͞Μ Reac%ve'Extensions'࠶ೖ໳ h"p:/ /okazuki.hatenablog.com/archive/category/Reac9ve%20Extensions
48. okazuki͞ΜͷReac*ve,Extensions࠶ೖ໳ Reac%ve'ExtensionsͷϝιουΛ࣮ࡍʹಈ͔ͨ͠αϯϓϧίʔυ͕ͨ͘͞Μ ϦϑΝϨϯεͷઆ໌จΛݟͯ΋ϝιουͷΠϝʔδ͕༙͖·ͤΜͰ͕ͨ͠ɺ ࣮ࡍͷίʔυͱ࣮ߦ݁ՌͰΠϝʔδ͕༙͖·ͨ͠ʂ
49. neuecc͞Μ ࿈ࡌɿReac%ve'ExtensionsʢRxʣೖ໳ h"p:/ /www.atmarkit.co.jp/fdotnet/introrx/index/ UniRxʹ͍ͭͯ h"p:/ /neue.cc/2014/08/23_476.html7ͳͲ
50. neuecc͞Μ ͔ͳΓૣ͍ஈ֊͔ΒReac%ve'Extensionsʹ஫໨͞Ε͍ͯͯ·͢ ϒϩάɺεϥΠυ͚ͩͰͳ͘@IT͞ΜͰ࿈ࡌ΋͞Ε͍ͯ·͢ UnityͰ࢖͑ΔReac*ve,ExtensionsҠ২ͷUniRxͷ࡞ऀ͞ΜͰ͢ ࠓ೔ొஃ͞Ε͍ͯ·͢
51. ʲ͜ͷ৘ใ͕ૉఢʂͱͬͯ΋෼͔Γ΍͍͢ʂʳ Reac%ve'ExtensionsͷࢿྉͰRxͷษڧΛ͠ɺ RxJavaΛ࢖͍͜ͳ͢ Ͱͨ͠ʂ
52. γϯϓϧͳྫͰ͕͢ɺ ·ͣखΛಈ͔ͯ͠Έ·ͨ͠ʂ ࠓޙ΋΍ͬͯΈͯɺ౤ߘ͍ͯ͜͠͏ͱࢥ͍·͢ ؒҧ͍ͬͯͨΒɺ༏͘͠·͔͞Γ౤͍͚͛ͯͨͩΔͱ͏Ε͍͠Ͱ͢ RxAndroid+Groovy-:ɹh0p:/ /qiita.com/RyotaMurohoshi/items/48bbbecea49591fd20a2 UnityͰUniRxΛ࢖ͬͯ(:(h+p:/ /qiita.com/RyotaMurohoshi/items/7e1509e03d8e3a1eae4f
53. ൓ল ཧ࿦తͳجૅͷษڧΛޙճ͠ʹ͗ͯ͢͠͠·ͬͨɻ
54. FRP΍Rxʹ͍ͭͯ ·ͬͨ͘;Εͣਃ͠༁ͳ͍Ͱ͢ʂ
55. ʲॳ৺ऀ͚ͩΕͲʳ RxɺGroovyͰࢼ͢ͷ͋Γͩͱࢥ͏͠ɺ Reac%ve'Extensinsͷࢿྉ͸ ͱͬͯ΋ࢀߟʹͳΔͱࢥ͏ɻ Ͱͨ͠ɻ
56. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ @RyotaMurohoshi h"p:/ /qiita.com/RyotaMurohoshi