Rxjava 简明教程
RxJava - PublishSubject
PublishSubject 向当前已订阅的 Observer 发出项，并向当前或迟到的 Observer 发出终结事件。
Class Declaration
以下是 io.reactivex.subjects.PublishSubject<T> 类的声明 −
public final class PublishSubject<T>
extends Subject<T>PublishSubject Example
在任意编辑器中使用任何您选择的语言（如 C:\>RxJava) 创建以下 Java 程序。
ObservableTester.java
import io.reactivex.subjects.PublishSubject;
public class ObservableTester {
public static void main(String[] args) {
final StringBuilder result1 = new StringBuilder();
final StringBuilder result2 = new StringBuilder();
PublishSubject<String> subject = PublishSubject.create();
subject.subscribe(value -> result1.append(value) );
subject.onNext("a");
subject.onNext("b");
subject.onNext("c");
subject.subscribe(value -> result2.append(value));
subject.onNext("d");
subject.onComplete();
//Output will be abcd
System.out.println(result1);
//Output will be d only
//as subscribed after c item emitted.
System.out.println(result2);
}
}