RxJava2 入门详细笔记（三）—— 功能操作符

一、功能操作符

1.1、delay()

延迟一段事件再发送事件

        Observable.just(1, 2, 3)
                .delay(3, TimeUnit.SECONDS)
                .subscribe(new Consumer<Integer>() {
                    @Override
                    public void accept(Integer value) throws Exception {
                        Log.e(TAG, "value : " + value);
                    }
                });

1.2、doOnEach()

Observable 发送一次事件之前都会回调这个方法

Observable.just(1, 2, 3)
                .doOnEach(new Consumer<Notification<Integer>>() {
                    @Override
                    public void accept(Notification<Integer> integerNotification) throws Exception {
                        Log.e(TAG, "integerNotification value : " + integerNotification.getValue());
                    }
                })
                .subscribe(new Consumer<Integer>() {
                    @Override
                    public void accept(Integer value) throws Exception {
                        Log.e(TAG, "accept : " + value);
                    }
                });

10-06 05:53:28.510 8645-8645/? E/MainActivity: integerNotification value : 1
10-06 05:53:28.510 8645-8645/? E/MainActivity: accept : 1
10-06 05:53:28.510 8645-8645/? E/MainActivity: integerNotification value : 2
10-06 05:53:28.510 8645-8645/? E/MainActivity: accept : 2
10-06 05:53:28.510 8645-8645/? E/MainActivity: integerNotification value : 3
10-06 05:53:28.510 8645-8645/? E/MainActivity: accept : 3
10-06 05:53:28.510 8645-8645/? E/MainActivity: integerNotification value : null

1.3、doOnNext()

Observable 发送 onNext() 之前都会先回调这个方法

Observable.just(1, 2, 3)
                .doOnNext(new Consumer<Integer>() {
                    @Override
                    public void accept(Integer integer) throws Exception {
                        Log.e(TAG, "doOnNext accept : " + integer);
                    }
                })
                .subscribe(new Consumer<Integer>() {
                    @Override
                    public void accept(Integer value) throws Exception {
                        Log.e(TAG, "accept : " + value);
                    }
                });

10-06 05:55:25.618 8758-8758/leavesc.hello.rxjavademo E/MainActivity: doOnNext accept : 1
10-06 05:55:25.618 8758-8758/leavesc.hello.rxjavademo E/MainActivity: accept : 1
10-06 05:55:25.618 8758-8758/leavesc.hello.rxjavademo E/MainActivity: doOnNext accept : 2
10-06 05:55:25.618 8758-8758/leavesc.hello.rxjavademo E/MainActivity: accept : 2
10-06 05:55:25.618 8758-8758/leavesc.hello.rxjavademo E/MainActivity: doOnNext accept : 3
10-06 05:55:25.618 8758-8758/leavesc.hello.rxjavademo E/MainActivity: accept : 3

1.4、doAfterNext()

Observable 发送 onNext() 之后都会回调这个方法

Observable.just(1, 2, 3)
                .doAfterNext(new Consumer<Integer>() {
                    @Override
                    public void accept(Integer integer) throws Exception {
                        Log.e(TAG, "doOnNext accept : " + integer);
                    }
                })
                .subscribe(new Consumer<Integer>() {
                    @Override
                    public void accept(Integer value) throws Exception {
                        Log.e(TAG, "accept : " + value);
                    }
                });

10-06 05:57:09.357 8872-8872/leavesc.hello.rxjavademo E/MainActivity: accept : 1
10-06 05:57:09.357 8872-8872/leavesc.hello.rxjavademo E/MainActivity: doOnNext accept : 1
10-06 05:57:09.357 8872-8872/leavesc.hello.rxjavademo E/MainActivity: accept : 2
10-06 05:57:09.357 8872-8872/leavesc.hello.rxjavademo E/MainActivity: doOnNext accept : 2
10-06 05:57:09.357 8872-8872/leavesc.hello.rxjavademo E/MainActivity: accept : 3
10-06 05:57:09.357 8872-8872/leavesc.hello.rxjavademo E/MainActivity: doOnNext accept : 3

1.5、doOnComplete()

Observable 调用 onComplete() 之前都会回调这个方法

Observable.just(1, 2, 3)
                .doOnComplete(new Action() {
                    @Override
                    public void run() throws Exception {
                        Log.e(TAG, "doOnComplete run()");
                    }
                })
                .subscribe(new Consumer<Integer>() {
                    @Override
                    public void accept(Integer value) throws Exception {
                        Log.e(TAG, "accept : " + value);
                    }
                });

10-06 06:08:43.688 8982-8982/leavesc.hello.rxjavademo E/MainActivity: accept : 1
10-06 06:08:43.688 8982-8982/leavesc.hello.rxjavademo E/MainActivity: accept : 2
10-06 06:08:43.688 8982-8982/leavesc.hello.rxjavademo E/MainActivity: accept : 3
10-06 06:08:43.688 8982-8982/leavesc.hello.rxjavademo E/MainActivity: doOnComplete run()

1.6、doOnError()

Observable 发送 onError() 之前都会回调这个方法

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onError(new Exception("Normal Exception"));
            }
        }).doOnError(new Consumer<Throwable>() {
            @Override
            public void accept(Throwable throwable) throws Exception {
                Log.e(TAG, "doOnError accept() : " + throwable.getMessage());
            }
        }).subscribe(new Observer<Integer>() {
            @Override
            public void onSubscribe(Disposable d) {

            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {

            }
        });

10-06 06:14:17.894 9230-9230/? E/MainActivity: onNext : 1
10-06 06:14:17.894 9230-9230/? E/MainActivity: onNext : 2
10-06 06:14:17.894 9230-9230/? E/MainActivity: doOnError accept() : Normal Exception
10-06 06:14:17.894 9230-9230/? E/MainActivity: onError : Normal Exception

1.7、doOnSubscribe()

Observable 发送 onSubscribe() 之前会回调这个方法

1.8、doOnDispose()

当调用 Disposable 的 dispose() 之后会回调该方法

1.9、doOnLifecycle()

在回调 onSubscribe 之前回调该方法的第一个参数的回调方法，可以使用该回调方法决定是否取消订阅，doOnLifecycle() 第二个参数的回调方法的作用与 doOnDispose() 一样

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onComplete();
            }
        }).doOnLifecycle(new Consumer<Disposable>() {
            @Override
            public void accept(Disposable disposable) throws Exception {
                Log.e(TAG, "doOnLifecycle accept");
            }
        }, new Action() {
            @Override
            public void run() throws Exception {
                Log.e(TAG, "doOnLifecycle run");
            }
        }).subscribe(new Observer<Integer>() {

            private Disposable disposable;

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
                this.disposable = d;
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
                disposable.dispose();
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 06:31:45.011 9602-9602/leavesc.hello.rxjavademo E/MainActivity: doOnLifecycle accept
10-06 06:31:45.011 9602-9602/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 06:31:45.011 9602-9602/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 06:31:45.011 9602-9602/leavesc.hello.rxjavademo E/MainActivity: doOnLifecycle run

1.10、doOnTerminate() & doAfterTerminate()

doOnTerminate 是在 onError 或者 onComplete 发送之前回调，而 doAfterTerminate 则是 onError 或者 onComplete 发送之后回调

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onComplete();
            }
        }).doOnTerminate(new Action() {
            @Override
            public void run() throws Exception {
                Log.e(TAG, "doOnTerminate run");
            }
        }).doAfterTerminate(new Action() {
            @Override
            public void run() throws Exception {
                Log.e(TAG, "doAfterTerminate run");
            }
        }).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 06:34:55.968 9713-9713/? E/MainActivity: onSubscribe
10-06 06:34:55.968 9713-9713/? E/MainActivity: onNext : 1
10-06 06:34:55.968 9713-9713/? E/MainActivity: onNext : 2
10-06 06:34:55.968 9713-9713/? E/MainActivity: doOnTerminate run
10-06 06:34:55.968 9713-9713/? E/MainActivity: onComplete
10-06 06:34:55.968 9713-9713/? E/MainActivity: doAfterTerminate run

1.11、doFinally()

在所有事件发送完毕之后回调该方法。 doFinally() 和 doAfterTerminate() 的区别在于取消订阅时，如果取消订阅，之后 doAfterTerminate() 就不会被回调，而 doFinally() 无论怎么样都会被回调，且都会在事件序列的最后

1.12、onErrorReturn()

当接受到一个 onError() 事件之后回调，返回的值会回调 onNext() 方法，并正常结束该事件序列

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onError(new Exception("Normal Exception"));
            }
        }).onErrorReturn(new Function<Throwable, Integer>() {
            @Override
            public Integer apply(Throwable throwable) throws Exception {
                return 7;
            }
        }).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 06:43:13.702 9946-9946/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 06:43:13.702 9946-9946/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 06:43:13.702 9946-9946/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 06:43:13.712 9946-9946/leavesc.hello.rxjavademo E/MainActivity: onNext : 7
10-06 06:43:13.712 9946-9946/leavesc.hello.rxjavademo E/MainActivity: onComplete

1.13、onErrorResumeNext()

当接收到 onError() 事件时，返回一个新的 Observable，并正常结束事件序列

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onError(new Exception("Normal Exception"));
            }
        }).onErrorResumeNext(new Function<Throwable, ObservableSource<? extends Integer>>() {
            @Override
            public ObservableSource<? extends Integer> apply(Throwable throwable) throws Exception {
                Log.e(TAG, "onErrorResumeNext apply: " + throwable.getMessage());
                return Observable.just(4, 5, 6);
            }
        }).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onErrorResumeNext apply: Normal Exception
10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onNext : 4
10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onNext : 5
10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onNext : 6
10-06 06:46:36.650 10243-10243/leavesc.hello.rxjavademo E/MainActivity: onComplete

1.14、 onExceptionResumeNext()

与 onErrorResumeNext() 作用基本一致，但是这个方法只能捕捉 Exception，不能捕获 Error

Observable.create(new ObservableOnSubscribe<Integer>() {
    @Override
    public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
        emitter.onNext(1);
        emitter.onNext(2);
        emitter.onError(new Exception("Normal Exception"));
    }
}).onExceptionResumeNext(new Observable<Integer>() {
    @Override
    protected void subscribeActual(Observer<? super Integer> observer) {
        Log.e(TAG, "onExceptionResumeNext subscribeActual");
        observer.onNext(3);
        observer.onComplete();
    }
}).subscribe(new Observer<Integer>() {

    @Override
    public void onSubscribe(Disposable d) {
        Log.e(TAG, "onSubscribe");
    }

    @Override
    public void onNext(Integer integer) {
        Log.e(TAG, "onNext : " + integer);
    }

    @Override
    public void onError(Throwable e) {
        Log.e(TAG, "onError : " + e.getMessage());
    }

    @Override
    public void onComplete() {
        Log.e(TAG, "onComplete");
    }
});

10-06 06:51:49.396 10369-10369/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 06:51:49.396 10369-10369/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 06:51:49.396 10369-10369/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 06:51:49.396 10369-10369/leavesc.hello.rxjavademo E/MainActivity: onExceptionResumeNext subscribeActual
10-06 06:51:49.396 10369-10369/leavesc.hello.rxjavademo E/MainActivity: onNext : 3
10-06 06:51:49.396 10369-10369/leavesc.hello.rxjavademo E/MainActivity: onComplete

将 emitter.onError(new Exception("Normal Exception")) 改为 emitter.onError(new Error("Normal Exception"));

异常将不会被捕获

10-06 06:53:21.655 10479-10479/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 06:53:21.655 10479-10479/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 06:53:21.655 10479-10479/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 06:53:21.655 10479-10479/leavesc.hello.rxjavademo E/MainActivity: onError : Normal Exception

1.15、retry()

如果出现错误事件，则会重新发送所有事件序列指定次数

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onError(new Error("Normal Exception"));
            }
        }).retry(2).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 06:55:17.273 10591-10591/? E/MainActivity: onSubscribe
10-06 06:55:17.273 10591-10591/? E/MainActivity: onNext : 1
10-06 06:55:17.273 10591-10591/? E/MainActivity: onNext : 2
10-06 06:55:17.273 10591-10591/? E/MainActivity: onNext : 1
10-06 06:55:17.273 10591-10591/? E/MainActivity: onNext : 2
10-06 06:55:17.273 10591-10591/? E/MainActivity: onNext : 1
10-06 06:55:17.273 10591-10591/? E/MainActivity: onNext : 2
10-06 06:55:17.273 10591-10591/? E/MainActivity: onError : Normal Exception

1.16、retryUntil()

出现错误事件之后，可以通过此方法判断是否继续发送事件

private int index = 1;

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onError(new Exception("Normal Exception"));
            }
        }).retryUntil(new BooleanSupplier() {
            @Override
            public boolean getAsBoolean() throws Exception {
                Log.e(TAG, "getAsBoolean");
                return index == 7;
            }
        }).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
                index++;
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: getAsBoolean
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: getAsBoolean
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: getAsBoolean
10-06 07:19:07.675 11433-11433/leavesc.hello.rxjavademo E/MainActivity: onError : Normal Exception

1.17、repeat()

以指定次数重复发送被观察者的事件

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onComplete();
            }
        }).repeat(2).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 07:38:47.680 12155-12155/? E/MainActivity: onSubscribe
10-06 07:38:47.690 12155-12155/? E/MainActivity: onNext : 1
10-06 07:38:47.690 12155-12155/? E/MainActivity: onNext : 2
10-06 07:38:47.690 12155-12155/? E/MainActivity: onNext : 1
10-06 07:38:47.690 12155-12155/? E/MainActivity: onNext : 2
10-06 07:38:47.690 12155-12155/? E/MainActivity: onComplete

1.18、repeatWhen()

返回一个新的被观察者来决定是否重复发送事件。如果新的被观察者返回 onComplete 或者 onError 事件，则旧的被观察者不会发送事件。如果新的被观察者返回其他事件，则旧的观察者会发送事件

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> e) throws Exception {
                e.onNext(1);
                e.onNext(2);
                e.onNext(3);
                e.onComplete();
            }
        }).repeatWhen(new Function<Observable<Object>, ObservableSource<?>>() {
            @Override
            public ObservableSource<?> apply(Observable<Object> objectObservable) throws Exception {
//                return Observable.empty();
//                return Observable.error(new Exception("Normal Exception"));
//                return Observable.just(1);
            }
        }).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

以上三种情况的输出结果分别是

10-06 14:29:05.641 20921-20921/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 14:29:05.641 20921-20921/leavesc.hello.rxjavademo E/MainActivity: onComplete

10-06 14:29:36.150 21027-21027/? E/MainActivity: onSubscribe
10-06 14:29:36.150 21027-21027/? E/MainActivity: onError : Normal Exception

10-06 14:30:33.220 21135-21135/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 14:30:33.220 21135-21135/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 14:30:33.220 21135-21135/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 14:30:33.220 21135-21135/leavesc.hello.rxjavademo E/MainActivity: onNext : 3
10-06 14:30:33.220 21135-21135/leavesc.hello.rxjavademo E/MainActivity: onComplete

1.19、subscribeOn() & observeOn()

subscribeOn() 用于指定被观察者的线程，要注意的时，如果多次调用此方法，只有第一次有效

observeOn() 用于指定观察者的线程，每指定一次就会生效一次

Observable.create(new ObservableOnSubscribe<Integer>() {
            @Override
            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                Log.e(TAG, "Observable Thread Name:  " + Thread.currentThread().getName());
                emitter.onNext(1);
                emitter.onNext(2);
                emitter.onComplete();
            }
        }).subscribeOn(Schedulers.newThread()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Observer<Integer>() {

            @Override
            public void onSubscribe(Disposable d) {
                Log.e(TAG, "onSubscribe");
                Log.e(TAG, "Observer Thread Name:  " + Thread.currentThread().getName());
            }

            @Override
            public void onNext(Integer integer) {
                Log.e(TAG, "onNext : " + integer);
            }

            @Override
            public void onError(Throwable e) {
                Log.e(TAG, "onError : " + e.getMessage());
            }

            @Override
            public void onComplete() {
                Log.e(TAG, "onComplete");
            }
        });

10-06 07:54:02.839 12629-12629/leavesc.hello.rxjavademo E/MainActivity: onSubscribe
10-06 07:54:02.839 12629-12629/leavesc.hello.rxjavademo E/MainActivity: Observer Thread Name:  main
10-06 07:54:02.839 12629-12643/leavesc.hello.rxjavademo E/MainActivity: Observable Thread Name:  RxNewThreadScheduler-1
10-06 07:54:02.859 12629-12629/leavesc.hello.rxjavademo E/MainActivity: onNext : 1
10-06 07:54:02.869 12629-12629/leavesc.hello.rxjavademo E/MainActivity: onNext : 2
10-06 07:54:02.869 12629-12629/leavesc.hello.rxjavademo E/MainActivity: onComplete

调度器	作用
Schedulers.computation( )	用于使用计算任务，如事件循环和回调处理
Schedulers.immediate( )	当前线程
Schedulers.io( )	用于 IO 密集型任务，如果异步阻塞 IO 操作。
Schedulers.newThread( )	创建一个新的线程
AndroidSchedulers.mainThread()	Android 的 UI 线程，用于操作 UI。

RxJava2 入门详细笔记（三）—— 功能操作符

一、功能操作符

悦读