应用程序关闭时继续服务工作

Question

我有一个简单的服务

public class UpdateService extends Service {
   private int seconds;
   final static String MY_ACTION = "MY_ACTION";

@Override
public void onCreate() {
    super.onCreate();
}

@Override
public void onStart(Intent intent, int startId) {
    timer.start();
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

final CountDownTimer timer = new CountDownTimer(86400000, 1000) {

    public void onTick(long millisUntilFinished) {

        Util.saveInfo(getApplicationContext(), Util.SECONDS, seconds++);

        Intent intent = new Intent();
        intent.setAction(MY_ACTION);
        sendBroadcast(intent);
    }

     public void onFinish() { }
  };
}

当我关闭应用程序服务时停止工作。但是显示该服务正在运行。

我做错了什么？

更新
我将CountDownTimer更改为Thread，但问题仍然存在

Thread t1 = new Thread(new Runnable() {

    @Override
    public void run() {
        while (true) {
            Util.saveInfo(getApplicationContext(), Util.SECONDS, seconds++);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
});

的OnStart（）

    if(!t1.isAlive())
        t1.start();

Answer 1

由于CountDown Timer仅有效foreground表示应用正在运行且未最小化或已关闭。您必须在Thread中放置Service，以便在特定时间执行。

试试这个：

public class LocalService extends Service
{
    private static Timer timer = new Timer(); 
    private Context ctx;

    public IBinder onBind(Intent arg0) 
    {
          return null;
    }

    public void onCreate() 
    {
          super.onCreate();
          ctx = this; 
          startService();
    }

    private void startService()
    {           
        timer.scheduleAtFixedRate(new mainTask(), 0, 5000);
    }

    private class mainTask extends TimerTask
    { 
        public void run() 
        {
            toastHandler.sendEmptyMessage(0);
        }
    }    

    public void onDestroy() 
    {
          super.onDestroy();
          Toast.makeText(this, "Service Stopped ...", Toast.LENGTH_SHORT).show();
    }

    private final Handler toastHandler = new Handler()
    {
        @Override
        public void handleMessage(Message msg)
        {
            System.out.println("test");
        }
    };    
}