RX操作符之Observable的创建方式二（defer、range、interval、timer、Empty、Never、Throw）

String [] items = new String[] {"just1","just2","just3","just4","just5","just6"};Observable<String> myObservable = Observable.fromArray(items);Subject<String> subject = new Subject<String>() {    @Override    public void onSubscribe(Disposable d) {

    }    @Override    public void onNext(String value) {        System.out.println("onNext................."+value);    }    @Override    public void onError(Throwable e) {    }    @Override    public void onComplete() {        System.out.println("onCompleted.................");    }    @Override    protected void subscribeActual(Observer<? super String> observer) {    }    @Override    public boolean hasObservers() {        return false;    }    @Override    public boolean hasThrowable() {        return false;    }    @Override    public boolean hasComplete() {        return false;    }    @Override    public Throwable getThrowable() {        return null;    }};Subject<String> subject1 = new Subject<String>() {    @Override    public void onSubscribe(Disposable d) {    }    @Override    public void onNext(String value) {        System.out.println("onNext................."+value);    }    @Override    public void onError(Throwable e) {    }    @Override    public void onComplete() {        System.out.println("onCompleted1.................");    }    @Override    protected void subscribeActual(Observer<? super String> observer) {    }    @Override    public boolean hasObservers() {        return false;    }    @Override    public boolean hasThrowable() {        return false;    }    @Override    public boolean hasComplete() {        return false;    }    @Override    public Throwable getThrowable() {        return null;    }};myObservable.subscribe(subject);myObservable.subscribe(subject1);

9-05 15:32:58.129 18491-18491 I/System.out: onNext.................just109-05 15:32:58.129 18491-18491 I/System.out: onNext.................just209-05 15:32:58.129 18491-18491 I/System.out: onNext.................just309-05 15:32:58.129 18491-18491 I/System.out: onNext.................just409-05 15:32:58.129 18491-18491 I/System.out: onNext.................just509-05 15:32:58.129 18491-18491 I/System.out: onNext.................just609-05 15:32:58.129 18491-18491 I/System.out: onCompleted.................09-05 15:32:58.129 18491-18491 I/System.out: onNext.................just109-05 15:32:58.129 18491-18491 I/System.out: onNext.................just209-05 15:32:58.129 18491-18491 I/System.out: onNext.................just309-05 15:32:58.139 18491-18491I/System.out: onNext.................just409-05 15:32:58.139 18491-18491 I/System.out: onNext.................just509-05 15:32:58.139 18491-18491/com.vise.snowdemo I/System.out: onNext.................just609-05 15:32:58.139 18491-18491/com.vise.snowdemo I/System.out: onCompleted1.................

二、Range创建一个发射特定整数序列的Observable,接收两个参数，第一个参数是范围的起始值，第二个参数是范围的数据数目，即需要多产生多少个这样的值。如果你将第二个参数设为0，将导致Observable不发射任何数据（如果设置为负数，会抛异常）。range默认不在任何特定的调度器上执行

Observable<Integer> myObservable = Observable.range(5,10);Subject<Integer> mySubscriber = new Subject<Integer>() {    @Override    public void onSubscribe(Disposable d) {    }    @Override    public void onNext(Integer value) {        System.out.println(String.valueOf(value));    }    @Override    public void onError(Throwable e) {    }    @Override    public void onComplete() {        System.out.println("onCompleted.................");    }    @Override    protected void subscribeActual(Observer<? super Integer> observer) {    }    @Override    public boolean hasObservers() {        return false;    }    @Override    public boolean hasThrowable() {        return false;    }    @Override    public boolean hasComplete() {        return false;    }    @Override    public Throwable getThrowable() {        return null;    }};myObservable.subscribe(mySubscriber);
09-05 15:44:22.169 27514-27514 I/System.out: 509-05 15:44:22.169 27514-27514 I/System.out: 609-05 15:44:22.169 27514-27514 I/System.out: 709-05 15:44:22.169 27514-27514 I/System.out: 809-05 15:44:22.169 27514-27514 I/System.out: 909-05 15:44:22.169 27514-27514 I/System.out: 1009-05 15:44:22.169 27514-27514 I/System.out: 1109-05 15:44:22.169 27514-27514 I/System.out: 1209-05 15:44:22.169 27514-27514 I/System.out: 1309-05 15:44:22.169 27514-27514 I/System.out: 1409-05 15:44:22.169 27514-27514 I/System.out: onCompleted...
三、IntervalInterval操作符返回一个Observable，它按固定的时间间隔发射一个无限递增的整数序列。RxJava将这个操作符实现为interval方法。它接受一个表示时间间隔的参数和一个表示时间单位的参数。结果递增且不断增加
五、Empty        创建一个不发射任何数据但是正常终止的Observable六、Never        创建一个不发射数据也不终止的Observable七、Throw        创建一个不发射数据以一个错误终止的Observable