明日から使えるRxjava頻出パターン (Droid kaigi 2016)

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13. public interface Callback { void onSuccess(List<Recipe> recipes); void onError(Throwable t); } public void searchRecipe(String keyword, Callback callback) {  recipeApiClient.search(keyword, callback);  }

14. searchRecipe(“ステーキ”, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  addToList(recipes); } @Override public void onError(Throwable t) { showErrorView(t); } });  }

18. searchRecipe(“ステーキ”, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  addToList(recipes); } @Override public void onError(Throwable t) { showErrorView(t); } });  } !

19. searchRecipe(“ステーキ”, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  addToList(recipes); } @Override public void onError(Throwable t) { showErrorView(t); } });  } ! !

20. searchRecipe(“ステーキ”, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  addToList(recipes); } @Override public void onError(Throwable t) { showErrorView(t); } });  } ! ! !

21. searchRecipe(“ステーキ”, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  addToList(recipes); } @Override public void onError(Throwable t) { showErrorView(t); } });  } ! ! ! !

26. searchRecipe(“ステーキ”, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  addToList(recipes); } @Override public void onError(Throwable t) { showErrorView(t); } });  } "

28.   # app/build.gradle  dependencies {  compile 'io.reactivex:rxjava:1.1.1' compile 'io.reactivex:rxandroid:1.1.0'  }

29. public void searchRecipe(String keyword, Callback callback) {  recipeApiClient.search(keyword, callback);  }

32.   public void searchRecipe(String keyword) {  recipeApiClient.search(keyword, new Callback() { @Override public void onSuccess(List<Recipe> recipes) { } @Override public void onError(Throwable t) { } });  }

33.   public void searchRecipe(String keyword) {  recipeApiClient.search(keyword, new Callback() { @Override public void onSuccess(List<Recipe> recipes) { } @Override public void onError(Throwable t) { } });  }

34.   public Observable<List<Recipe>> searchRecipe(String keyword) {  recipeApiClient.search(keyword, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  } @Override public void onError(Throwable t) {  } });  }

35.   public Observable<List<Recipe>> searchRecipe(String keyword) {  recipeApiClient.search(keyword, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  } @Override public void onError(Throwable t) {  } });  }

36. public Observable<List<Recipe>> searchRecipe(String keyword) { return Observable.create(subscriber -> {                        }); } void   recipeApiClient.search(keyword, new Callback() {  @Override  public void onSuccess(List<Recipe> recipes) {      } @Override public void onError(Throwable t) {  }  });

37. public Observable<List<Recipe>> searchRecipe(String keyword) { return Observable.create(subscriber -> {  recipeApiClient.search(keyword, new Callback() {  @Override  public void onSuccess(List<Recipe> recipes) {      } @Override public void onError(Throwable t) {   } }); }); } void

38. public Observable<List<Recipe>> searchRecipe(String keyword) { return Observable.create(subscriber -> {  recipeApiClient.search(keyword, new Callback() {  @Override  public void onSuccess(List<Recipe> recipes) {  subscriber.onNext(recipes);// イベントの通知 subscriber.onCompleted(); // 全イベントが終了した通知  } @Override public void onError(Throwable t) { subscriber.onError(t); // 処理内で失敗した通知 } }); }); } void

41. public List<Recipe> searchRecipe(String keyword) throws HttpException { // okhttpとかHttpClientで同期通信  }   public Observable<List<Recipe>> searchRecipe(String keyword) { return Observable.create(subscriber -> { try{  List<Recipe> recipes = ApiClient.search(keyword); subscriber.onNext(recipes); subscriber.onFinished(); } catch(HttpException e) {  subscriber.onError(e);  } }

42. searchRecipe(“ステーキ”) .subscribe(new Subscriber<List<Recipe>>() {  @Override  public void onNext(List<Recipe> recipe) {  addToList(recipes);  }  @Override  public void onError(Throwable e) {  showErrorMessage(t);  }    @Override  public void onCompleted() {   }); );

46. searchRecipe(“ステーキ”) .subscribe(new Subscriber<List<Recipe>>() {  @Override  public void onNext(List<Recipe> recipe) {  addToList(recipes);  }  @Override  public void onError(Throwable e) {  showErrorMessage(t);  }    @Override  public void onCompleted() {   }); ); !

47. searchRecipe(“ステーキ”) .subscribe(new Subscriber<List<Recipe>>() {  @Override  public void onNext(List<Recipe> recipe) {  addToList(recipes);  }  @Override  public void onError(Throwable e) {  showErrorMessage(t);  }    @Override  public void onCompleted() {   }); ); ! !

48. searchRecipe(“ステーキ”) .subscribe(new Subscriber<List<Recipe>>() {  @Override  public void onNext(List<Recipe> recipe) {  addToList(recipes);  }  @Override  public void onError(Throwable e) {  showErrorMessage(t);  }    @Override  public void onCompleted() {   }); ); ! ! !

49. searchRecipe(“ステーキ”) .subscribe(new Subscriber<List<Recipe>>() {  @Override  public void onNext(List<Recipe> recipe) {  addToList(recipes);  }  @Override  public void onError(Throwable e) {  showErrorMessage(t);  }    @Override  public void onCompleted() {   }); ); ! ! ! !

50. searchRecipe(“ステーキ”) .subscribe(recipes -> { addToList(recipes); }, throwable -> { showErrorMessage(t); }, () -> {  // 省略可能  } );

53. searchRecipe(“ステーキ”) .subscribe(recipes -> { addToList(recipes); }, throwable -> { showErrorMessage(t); }, () -> {  // 省略可能  } ); ! ! ! !

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61. searchRecipeBy(“ステーキ”)  .map(recipes -> { /* todo something */ })  .subscribeOn(Schedulers.io())  .map(recipes -> { /* todo something */ }) .subscribe(recipes -> {});

62. searchRecipeBy(“ステーキ”)  .map(recipes -> { /* todo something */ })  .subscribeOn(Schedulers.io())  .map(recipes -> { /* todo something */ }) .subscribe(recipes -> {});  

63. searchRecipeBy(“ステーキ”)  .map(recipes -> { /* todo something */ })  .subscribeOn(Schedulers.io())  .observeOn(AndroidSchedulers.mainThread())  .map(recipes -> { /* todo something */ }) .observeOn(Schedulers.io()) .subscribe(recipes -> {});

64. searchRecipeBy(“ステーキ”)  .map(recipes -> { /* todo something */ })  .subscribeOn(Schedulers.io())  .observeOn(AndroidSchedulers.mainThread())  .map(recipes -> { /* todo something */ }) .observeOn(Schedulers.io()) .subscribe(recipes -> {});

65. searchRecipeBy(“ステーキ”)  .map(recipes -> { /* todo something */ })  .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(recipes -> {});  

66. searchRecipe(“ステーキ”)  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(recipes -> { addToList(recipes); }, throwable -> { showErrorMessage(t); } );

69. searchRecipe(“ステーキ”)  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(recipes -> { addToList(recipes); }, throwable -> { showErrorMessage(t); } ); ! ! ! !

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72. searchRecipeBy(“ハンバーグ”, new Callback() { @Override public void onSuccess(List<Recipe> recipes) {  if(getActivity() == null) { return; }  addToList(recipes); } @Override public void onError(Throwable t) {  if(getActivity() == null) { return; } showErrorMessage(t); } });  }

73.   # app/build.gradle  dependencies {  compile 'com.trello:rxlifecycle:0.4.0' compile 'com.trello:rxlifecycle-components:0.4.0'  }

74. searchRecipeBy(“ハンバーグ”) .compose(bindToLifecycle())  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(recipes -> { addList(recipes); }, throwable -> { showErrorMessage(t); } );

77. searchRecipeBy(“ハンバーグ”) .compose(bindToLifecycle())  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(recipes -> { addList(recipes); }, throwable -> { showErrorMessage(t); } ); ! ! ! !

80. searchRecipeBy(“ハンバーグ”) .compose(bindToLifecycle())  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(recipes -> { addList(recipes); }, throwable -> { showErrorMessage(t); } );  

81. searchRecipeBy(“ハンバーグ”) .compose(bindToLifecycle())  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(recipes -> { addList(recipes); }, throwable -> { showErrorMessage(t); } );  

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102. Observable.combineLatest(  Observable.just(1),  Observable.just(2),  (i1,i2) -> i1 + i2 // この場合、3が次のオペレーターに渡る  );

103. Observable.combineLatest(  Observable.just(1),  Observable.just(2),  (i1,i2) -> Pair.create(i1, i2)  ); Observable.combineLatest(  Observable.just(1),  Observable.just(2),  Pair::create  );

104. Observable.combineLatest( searchRecipe(“ステーキ”), searchAd(“ステーキ”), // 広告情報を取得するメソッドだと思って下さい Pair::create )  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(pair -> { addToListWithBannerIfExist(pair.first, pair.second); }, throwable -> { showErrorMessage(t); } );

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119. AdObservable(“タマゴ”) .onErrorReturn(throwable -> AdModel.EmptyData());

120. public Observable<AdModel> searchAd(String keyword) { return Observable.create(subscriber -> { try{  AdModel adModel = adClient.search(keyword); subscriber.onNext(adModel); } catch(HttpException e) {  subscriber.onError(e);  }) .onErrorReturn(e -> { return AdModel.createEmptyData();  }); }

125. Observable.combineLatest( searchRecipe(“ステーキ”), searchAd(“ステーキ”), Pair::create )  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe( /* 省略 */ );

130. Observable.combineLatest( searchRecipe(“ステーキ”).subscribeOn(schedulers.io()), searchAd(“ステーキ”).subscribeOn(schedulers.io()), Pair::create )  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe( /* 省略 */ );

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132. AdObservable(“タマゴ”) .retry(1); // 例外が発生した場合１回だけリトライする AdObservable(“タマゴ”) .retry((count, throwable) -> count > 2)

133.   public Observable<AdModel> searchAd(String keyword) { return Observable.create(subscriber -> { try{  AdModel ad = AdClient.search(keyword); subscriber.onNext(ad); } catch(HttpException e) {  subscriber.onError(e);  }) .retry(1) .onErrorReturn(e -> { return AdModel.createEmptyData();  }); }

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139. searchRecipe(“ステーキ”) .flatMap(recipes -> fetchLikedRecipeIds(recipes)) .subscribe(recipeIds -> {})

143. searchRecipe(“ステーキ”)  .flatMap(recipes ->   Observable.combineLatest( Observable.just(recipes), // レシピリストをそのまま渡す  fetchLikedRecipe(recipes)), //レシピリストからLikeしたレシピIdを取得 Pair::create  )  )  .map(this::mergeLikeState) // mapでLike状態をレシピインスタンスに反映させる(省略) .subscribe(recipes -> {})

146. searchRecipe(“ステーキ”)  .flatMap(recipes -> {  fetchLikedRecipe(recipes)  .map(likeIds -> {  mergeLikeState(recipes, likeIds);  });  }  ) .subscribe(recipes -> {})

147. public Observable<List<Recipe>> searchRecipeWithLikeState(String keyword) { searchRecipe(keyword) .flatMap(recipes -> Observable.combineLatest( Observable.just(recipes), fetchLikedRecipeIds(recipes)), Pair::create ) ) .map(this::mergeLikeState) }  public Func1<List<Recipe>> mergeLikeState(Pair<List<Recipe>, Integer> pair) {  // Like状態をレシピインスタンスに反映させる(省略)  }

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162. Observable.combineLatest( searchRecipeWithLikeState(“ステーキ”) .subscribeOn(schedulers.io()), searchAd(“ステーキ”) .subscribeOn(schedulers.io()), Pair::create ) .compose(bindToLifecycle())  .subscribeOn(schedulers.io())  .observeOn(AndroidSchedulers.mainThread()) .subscribe(pair -> { addToList(pair.first, pair.second); }, throwable -> { showErrorMessage(t); } ); ! ! ! ♥ ♥ ♥

164. Observable.combineLatest(  Observable.just(1),  Observable.just(2),  (i1,i2) -> i1 + i2  );  

165. searchRecipe(“ステーキ”) .flatMap(recipes -> recipeClient.fetchLikedRecipeIds(recipes)) .subscribe(recipeIds -> {})

166.   public class Tuple3<T1, T2, T3> {  public T1 first; public T2 second; public T3 third;  public Tuple3(T1 first, T2 second, T3 third) {  this.first = first;  this.second = second;  this.third = third;  }  public static <T1, T2, T3> Tuple3<T1, T2, T3> create(T1 t1, T2 t2, T3 t3) {  return new Tuple3<>(t1, t2, t3);  }  }

167. // in your CustomApplication public void onCreate(Bundle saveInstanceState){  super.onCreate(); System.setProperty("rx.ring-buffer.size", "32"); }

169. Single.create(subscriber -> {  subscriber.onSuccess("Hello world");  }).subscribe(text -> {  System.out.println(text);  }, throwable -> {  Crashlytics.logException(e);  });

170.   Completable.create(subscriber -> {   subscriber.onCompleted()  }).subscribe(throwable -> {  Crashlytics.logException(e);  }, () -> {    });

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明日から使えるRxjava頻出パターン (Droid kaigi 2016)

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明日から使えるRxjava頻出パターン (Droid kaigi 2016)