Rxjava 简明教程
RxJava - ReplaySubject
ReplaySubject 会将事件/项目重放给当前和后来的观察者。
Class Declaration
下面是 io.reactivex.subjects.ReplaySubject<T> 类声明——
public final class ReplaySubject<T>
extends Subject<T>ReplaySubject 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.ReplaySubject;
public class ObservableTester {
public static void main(String[] args) {
final StringBuilder result1 = new StringBuilder();
final StringBuilder result2 = new StringBuilder();
ReplaySubject<String> subject = ReplaySubject.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 abcd being ReplaySubject
//as ReplaySubject emits all the items
System.out.println(result2);
}
}