Android服務不停止運行

Question

我創建了一個服務，並將它放在前臺併發出通知。在服務中，我有一個計時器，打印「SERVICE STILL RUNNING」讓我知道該服務還活着。當我關閉應用程序時，服務的OnDestroy（）被調用，但timmer仍然打印「SERVICE STILL RUNNING」，爲什麼？我通過調用showNotification（）將該服務置於前臺。如果我沒有調用showNotification（）並關閉應用程序，則服務會被破壞，而TIMMER會停止打印「SERVICE STILL RUNNING」。如何在前臺使用該服務，並在關閉應用程序時正確使用該服務。即使在應用程序關閉後，內存監視器仍會繼續顯示內存使用情況。如果我不把該服務放在前臺並關閉應用程序，內存監視器停止。此問題只發生在Android 6.0。

MainActivity：

public class MainActivity extends Activity { 

    Intent service; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 


     service = new Intent(MainActivity.this, MyService.class); 

     // starting Client service 
     service.setAction("START"); 
     startService(service); 
    } 


    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 
     service.setAction("STOP"); 
     stopService(service); 
    } 
} 

服務：

public class MyService extends Service { 

    Timer timer; 




    public MyService() { 
    } 

    @Override 
    public IBinder onBind(Intent intent) { 
     // TODO: Return the communication channel to the service. 
     throw new UnsupportedOperationException("Not yet implemented"); 
    } 


    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     //return super.onStartCommand(intent, flags, startId); 
     if(intent !=null) 
     { 
      if(intent.getAction().equals("START")) 
      { 

       showNotification(); 
      } else if(intent.getAction().equals("STOP")) 
      { 
       stopForeground(true); 
       stopSelf(); 

      } 
     }else 
     { 
      //stopForeground(true); 
      //stopSelf(); 

     } 




     return START_STICKY; 
    } 


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

     timer = new Timer(); 
     timer.scheduleAtFixedRate(new TimerTask() { 
      @Override 
      public void run() 
      { 


       Log.d("","SERVICE STILL RUNNING"); 

      } 
     },1*1000,5*1000); 
    } 

    private void showNotification() { 
     Intent notificationIntent = new Intent(this, MainActivity.class); 
     notificationIntent.setAction("new"); 
     notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK 
       | Intent.FLAG_ACTIVITY_CLEAR_TASK); 
     PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, 
       notificationIntent, 0); 


     Bitmap icon = BitmapFactory.decodeResource(getResources(), 
       R.drawable.ic_launcher); 

     Notification notification = new NotificationCompat.Builder(this) 
       .setContentTitle("Title") 
       .setTicker("Test") 
       .setContentText("testing") 
       .setSmallIcon(R.drawable.ic_launcher) 
       .setLargeIcon(Bitmap.createScaledBitmap(icon, 128, 128, false)) 
       .setContentIntent(pendingIntent) 
       .setOngoing(true).build(); 

     startForeground(101, notification); 

    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     Log.d("","SERVICE HAS BEEN DESTROYED!!!"); 
    } 
} 

Answer 1

嘗試在您添加此服務的的onDestroy

@Override 
public void onDestroy() { 
    super.onDestroy(); 
    timer.cancel(); 
    timer = null; 
    stopForeground(true);//Add this. Since stopping a service in started in foreground is different from normal services. 
    Log.d("","SERVICE HAS BEEN DESTROYED!!!"); 
} 

編輯

您的活動的方法的onDestroy

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    service.setAction("STOP"); 
    service.executeStopForeground(); 
    stopService(service); 
} 

然後在您的服務添加這個方法：

public void executeStopForeground() 
{ 
    stopForeground(true); 
}