用时间间隔致电ExectuorService -Android

发布于 2025-02-11 02:26:21 字数 653 浏览 0 评论 0原文

我使用自定义线程通过使线程入睡一次，每1秒钟一次在后台获取数据，但是我的应用程序崩溃并抛出异常 Outofmemoryerror 。现在，我阅读了Android开发人员中的文档，我知道使用自定义线程是不好的练习，因为很难管理内存一致性。但是最后，当我们需要在后台执行一些任务时，我发现 executorService 非常有趣，所以我决定使用它。

如您所知，执行人员服务如下所示：

public void executeTask()
{
    ExecutorService executroService = new Executor.newSingleThreadExecutor();
    executroService.execute(new Runnable()
    {
       @Override
       publi void run()
       {
          // now execute the server request
       }  
    });

}

现在，我该如何达到每1秒钟的呼叫执行人员服务，直到用户转到onpause（）状态，或者直到用户从当前活动转移到另一个活动？如果我使用自定义线程调用该服务，则该应用将崩溃。那我该如何实现呢？

原文

i used a custom thread to fetch data in the background every 1 second by making a thread goes to sleep, but my App crashes and throws exception OutOfMemoryError. Now i read a documentation in android developer and i understand that using custom thread is bad practice as it is difficult to manage the memory consistency. but finally i found ExecutorService very interesting when we need to do some tasks on background So, i decided to use it.

As You know the ExecutorService is like below:

public void executeTask()
{
    ExecutorService executroService = new Executor.newSingleThreadExecutor();
    executroService.execute(new Runnable()
    {
       @Override
       publi void run()
       {
          // now execute the server request
       }  
    });

}

Now how can i achive calling to executorService every 1 second untill the user goes to onpause() state or untill the user shifts from the current activity to another activity? if i use a custom thread to call that service, the App goes to crash. so how can i achive that ?

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娇女薄笑 2025-02-18 02:26:21

您需要的是 scheduledexecutorservice

给定延迟
或定期执行。

这是一个实现此功能的代码

 import static java.util.concurrent.TimeUnit.*;
 class BeeperControl {
   private final ScheduledExecutorService scheduler =
     Executors.newScheduledThreadPool(1);

   public void beepForAnHour() {
     Runnable beeper = () -> System.out.println("beep");
     ScheduledFuture<?> beeperHandle =
       scheduler.scheduleAtFixedRate(beeper, 10, 10, SECONDS);
     Runnable canceller = () -> beeperHandle.cancel(false);
     scheduler.schedule(canceller, 1, HOURS);
   }
 }

What you need is a ScheduledExecutorService

It can schedule commands to run after a given delay,
or to execute periodically.

Here is a code that implements this

 import static java.util.concurrent.TimeUnit.*;
 class BeeperControl {
   private final ScheduledExecutorService scheduler =
     Executors.newScheduledThreadPool(1);

   public void beepForAnHour() {
     Runnable beeper = () -> System.out.println("beep");
     ScheduledFuture<?> beeperHandle =
       scheduler.scheduleAtFixedRate(beeper, 10, 10, SECONDS);
     Runnable canceller = () -> beeperHandle.cancel(false);
     scheduler.schedule(canceller, 1, HOURS);
   }
 }

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