Rxjava 简明教程

RxJava - IO Scheduler

Schedulers.io() 方法创建一个调度器，并为 IO 绑定工作返回该调度器。线程池可能会根据需要进行扩展。最适用于 I/O 密集型操作。

Schedulers.io() 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 java.util.Random;

import io.reactivex.Observable;
import io.reactivex.schedulers.Schedulers;

public class ObservableTester  {
   public static void main(String[] args) throws InterruptedException {
      Observable.just("A", "AB", "ABC")
         .flatMap(v -> getLengthWithDelay(v)
         .doOnNext(s -> System.out.println("Processing Thread "
            + Thread.currentThread().getName()))
         .subscribeOn(Schedulers.io()))
         .subscribe(length -> System.out.println("Receiver Thread "
            + Thread.currentThread().getName()
            + ", Item length " + length));

         Thread.sleep(10000);
   }
   protected static Observable<Integer> getLengthWithDelay(String v) {
      Random random = new Random();
      try {
         Thread.sleep(random.nextInt(3) * 1000);
         return Observable.just(v.length());
      } catch (InterruptedException e) {
         e.printStackTrace();
      }
      return null;
   }
}

Verify the Result

按照如下方式使用 javac 编译器编译类 −

C:\RxJava>javac ObservableTester.java

现在按照如下所示运行 ObservableTester：

C:\RxJava>java ObservableTester

它应该产生以下输出 −

Processing Thread RxCachedThreadScheduler-1
Receiver Thread RxCachedThreadScheduler-1, Item length 1
Processing Thread RxCachedThreadScheduler-1
Receiver Thread RxCachedThreadScheduler-1, Item length 2
Processing Thread RxCachedThreadScheduler-1
Receiver Thread RxCachedThreadScheduler-1, Item length 3