Rxjava 简明教程

RxJava - Completable Observable

Completable 类表示延迟响应。Completable 可观察序列可以指示完成成功或错误。

The Completable class represents deferred response. Completable observable can either indicate a successful completion or error.

Class Declaration

以下是 io.reactivex.Completable 类的声明 −

Following is the declaration for io.reactivex.Completable class −

public abstract class Completable
extends Object
implements CompletableSource

Protocol

以下是 Completable Observable 运行的顺序协议 −

Following is the sequential protocol that Completable Observable operates −

onSubscribe (onError | onComplete)?

Completable 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。

Create the following Java program using any editor of your choice in, say, C:\> RxJava.

ObservableTester.java

import java.util.concurrent.TimeUnit;

import io.reactivex.Completable;
import io.reactivex.disposables.Disposable;
import io.reactivex.observers.DisposableCompletableObserver;
import io.reactivex.schedulers.Schedulers;

public class ObservableTester {
   public static void main(String[] args) throws InterruptedException {

      //Create an observer
      Disposable disposable = Completable.complete()
         .delay(2, TimeUnit.SECONDS, Schedulers.io())
         .subscribeWith(new DisposableCompletableObserver() {
         @Override
         public void onError(Throwable e) {
            e.printStackTrace();
         }
         @Override
         public void onStart() {
            System.out.println("Started!");
         }
         @Override
         public void onComplete() {
            System.out.println("Done!");
         }
      });
      Thread.sleep(3000);
      //start observing
      disposable.dispose();
   }
}

Verify the Result

按照如下方式使用 javac 编译器编译类 −

Compile the class using javac compiler as follows −

C:\RxJava>javac ObservableTester.java

现在按照如下所示运行 ObservableTester：

Now run the ObservableTester as follows −

C:\RxJava>java ObservableTester

它应该产生以下输出 −

It should produce the following output −

Started!
Done!