线stop（）已弃用。但是如何使用TimerTask呢？

Question

我已经开始了一个切换按钮按下线程。现在我想在再次按下切换按钮时停止该线程。但是线程。stop（）API已被弃用。所以，我得到了不支持的操作异常。我不知道如何使用TimerTask来替代它。以下是我的示例代码：

//AudioDispatcher implements a Runnable
public class AudioDispatcher implements Runnable

//This is a code to start a thread
AudioDispatcher dispatcher = AudioDispatcherFactory.fromDefaultMicrophone(22050,1024,0);
Thread t1 = new Thread(dispatcher,"Audio Dispatcher");
t1.start();

Answer 1

您可以尝试这个时间任务示例；

private static final int DEFAULT_DELAY_TIME = 1000;
private static final int DEFAULT_PERIOD = 1000;
private Timer mPlayTimer;
private TimeTask mPlayPlanTask;

private void startTask() {
        configTimer();
        mPlayTimer.schedule(mPlayPlanTask, DEFAULT_DELAY_TIME,
              DEFAULT_PERIOD);
    }
}

private void stopTimer() {
    if (mPlayTimer != null) {
        mPlayTimer.cancel();
        mPlayTimer = null;
    }
    if (null != mPlayPlanTask) {
        mPlayPlanTask.cancel();
        mPlayPlanTask = null;
    }
}

private void configTimer() {
    if (null == mPlayTimer) {
        mPlayTimer = new Timer();
    }
    if (null == mPlayPlanTask) {
        mPlayPlanTask = new TimerTask() {
            @Override
            public void run() {
                  // Do some work;
            }
        };
    }
}

Answer 2

创建标志并根据标志停止

 class Server implements Runnable{
      private volatile boolean exit = false;

      public void run() {

     while(!exit){ 
        System.out.println("Server is running....."); 
    } 

    System.out.println("Server is stopped...."); 
    } 

    public void stop(){ exit = true; } 
}

现在开始和停止

  Server myServer = new Server(); 
    Thread t1 = new Thread(myServer, "T1"); 
    t1.start(); 
//Now, let's stop our Server thread 
System.out.println(currentThread().getName() + " is stopping Server thread"); myServer.stop();

Answer 3

不能在执行过程中简单地停止线程。如果要在执行过程中停止线程，可以调用thread。中断（）方法。

public class SomeBackgroundProcess implements Runnable {

Thread backgroundThread;

public void start() {
   if( backgroundThread == null ) {
      backgroundThread = new Thread( this );
      backgroundThread.start();
   }
}

public void stop() {
   if( backgroundThread != null ) {
      backgroundThread.interrupt();
   }
}

public void run() {
    try {
       Log.i("Thread starting.");
       while( !backgroundThread.interrupted() ) {
          doSomething();
       }
       Log.i("Thread stopping.");
    } catch( InterruptedException ex ) {
       // important you respond to the InterruptedException and stop processing 
       // when its thrown!  Notice this is outside the while loop.
       Log.i("Thread shutting down as it was requested to stop.");
    } finally {
       backgroundThread = null;
    }
}