実際のアプリ開発で使ったRxを紹介 #RxJaNight

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1. 㹋ꥷך،فٔꟚ涪ד
   ⢪׏׋3Y׾稱➜ #RxJaNight
2. ࣗݾ঺հ • Yuki Funakoshi (@bl_lia) • NYLE Inc. • Android / iOS Engineer
3. جຊతͳ࿩
4. ඇಉظॲཧͷίϯϙʔωϯτԽ Πϕϯτϕʔεϓϩάϥϛϯά
5. Observable Subscriber subscribe send event
6. Observable Observable Observable Subscriber filter map send event operator
7. Observable Observable Subscriber send event send event
9. https://github.com/android10/Android-CleanArchitecture
10. public interface AppSearchRepository { Observable<List<SearchResult>> search(String query); Observable<List<SearchResult>> searchMore(String query); Observable<List<Suggest>> suggest(String query); }
11. Case 1 Observableͷ࡞੒
12. • just(T value) • create(Observable.OnSubscribe<T> f)
13. http://reactivex.io/documentation/operators/just.html
14. Observable.just(sharedPreferences.getBoolean(KEY_ENABLE, true));
15. http://reactivex.io/documentation/operators/create.html
16. Observable.create(subscriber -> { final Gson gson = new Gson(); final String alertJson = sharedPreferences.getString(KEY_ALERT, ""); final Alert alert = gson.fromJson(alertJson, Alert.class); subscriber.onNext(alert); subscriber.onCompleted(); });
17. Case 2 ॲཧͷՃ޻
18. • filter(Func1) • startWith(Iterable) / startWith(T)
19. http://reactivex.io/documentation/operators/filter.html
20. Ϧετ͔Βআ֎ ɾγεςϜΞϓϦ ɾApplivΞϓϦ
21. Observable.from(packageManager.getInstalledApplications(PackageManager.GET_META_DATA)) .filter(app -> { if ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == ApplicationInfo.FLAG_SYSTEM) return false; if (applicationInfo.packageName.equals(application.getPackageName())) return false; return true; }) .toList();
22. http://reactivex.io/documentation/operators/startwith.html
23. ةحف
24. recommendService.like(recommendId, isLike) .map(response -> response.recommend) .startWith(() -> { return fakeRecommend; });
25. Case 3 API͔Βͷσʔλऔಘ
26. • Retrofit • map(Func1) • doOnNext(Action1)
27. { "result": true, "items": [{ "id": "aaaaaa", "title": "Item A" },{ "id": "bbbbbb", "title": "Item B" }] }
29. dependencies { compile 'io.reactivex:rxjava:1.1.1' compile 'com.squareup.retrofit:retrofit:2.0.0-beta2' compile 'com.squareup.retrofit:adapter-rxjava:2.0.0-beta2' }
30. class Item { public final String id; public final String title; public Item(String id, String title) { this.id = id; this.title = title; } } class ItemResponse { public final boolean result; public final List<Item> items; public ItemResponse(boolean result, List<Item> items) { this.result = result; this.items = items; } } interface ItemService { @GET("/items") Observable<ItemResponse> items(); }
31. public void getItems() { final Retrofit retrofit = new Retrofit.Builder().baseUrl("http://hogehoge.com") .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .build(); final ItemService service = retrofit.create(ItemService.class); service.items() .map(itemResponse -> itemResponse.items); }
32. http://reactivex.io/documentation/operators/map.html
33. Factory Class cached? Disk Data Store API Data Store Disk Data Cache API
34. Factory Class cached? Disk Data Store API Data Store Disk Data Cache API
35. Factory Class cached? Disk Data Store API Data Store Disk Data Cache API
36. Factory Class cached? Disk Data Store API Data Store Disk Data Cache API
37. http://reactivex.io/documentation/operators/do.html
38. interface ItemCache { void addItems(List<Item> items); } public void getItems(ItemCache cache) { final Retrofit retrofit = new Retrofit.Builder().baseUrl("http://hogehoge.com") .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .build(); final ItemService service = retrofit.create(ItemService.class); service.items() .map(itemResponse -> itemResponse.items) .doOnNext(items -> cache.addItems(items)); }
39. ׉ך➭
40. • Τϥʔॲཧܥ • subscriber.onError(Throwable) • OnErrorThrowable.from(Throwable) • Observable.onError(Throwable) • onErrorResumeNext(Observable) • onErrorReturn(Func1)
41. • ςετ·ΘΓ • TestSubscriber<T> • assertCompleted() / assertNotCompleted() • assertValue(T value) / assertNoValues() • assertError(java.lang.Throwable throwable) / assertNoErrors()