如何從通知中取消IntentService？

Question

我有一個基本上從0-9循環的服務，併爲每個循環睡1000次。該服務還會創建一個顯示進度的通知。我想添加一些允許我取消該服務的操作。我有以下代碼，但它似乎並沒有工作。

我想出這個從以下以下內容：

Android Jelly Bean notifications with actions

Android notification .addAction deprecated in api 23

public class FileOperationService extends IntentService { 

    public FileOperationService() { 
     super("FileOperationService"); 
    } 

    @Override 
    protected void onHandleIntent(@Nullable Intent intent) { 
     Intent deleteIntent = new Intent(this, CancelFileOperationReceiver.class); 
     deleteIntent.putExtra("notification_id",1); 
     PendingIntent pendingIntentCancel = PendingIntent.getBroadcast(this, 0, deleteIntent, PendingIntent.FLAG_UPDATE_CURRENT); 

     NotificationManagerCompat manager = (NotificationManagerCompat.from(this)); 

     NotificationCompat.Builder builder = new NotificationCompat.Builder(this); 

     Intent notificationIntent = new Intent(this, MainActivity.class); 
     notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); 
     PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT); 

     NotificationCompat.Action action = new NotificationCompat.Action.Builder(android.R.drawable.ic_menu_close_clear_cancel, "Cancel", pendingIntentCancel).build(); 

     builder.setContentIntent(pendingIntent); 
     builder.setContentText("In Progress"); 
     builder.setSmallIcon(R.mipmap.ic_launcher); 
     builder.addAction(action); 
     builder.setProgress(9, 0, false); 

     for (int i = 0; i < 10; i++) { 
      Log.d("Service", String.valueOf(i)); 
      builder.setProgress(9, i, false); 

      if (i == 9) { 
       builder.setContentTitle("Done"); 
       builder.setContentText(""); 
       builder.setProgress(0, 0, false); 
       manager.notify(1, builder.build()); 
      } else { 
       manager.notify(1, builder.build()); 
      } 
      try { 
       Thread.sleep(1000); 
      } catch (InterruptedException e) { 
       e.printStackTrace(); 
      } 
     } 

    } 

} 


public class CancelFileOperationReceiver extends BroadcastReceiver { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     Intent service = new Intent(); 
     service.setComponent(new ComponentName(context, FileOperationService.class)); 
     context.stopService(service); 
     NotificationManagerCompat manager = (NotificationManagerCompat.from(context)); 
     manager.cancel(intent.getIntExtra("notification_id",0)); 

     Log.d("Cancel","true"); 
    } 

} 

我可以看到它取消通知，因爲每次我點擊取消關閉。但是，它似乎並沒有取消IntentService，因爲每個循環都會彈出一個新的通知。

Answer 1

當onHandleIntent（）結束時，如果在onHandleIntent（）運行時沒有更多命令發送給它，IntentService會自動停止。因此，您不要自己手動停止IntentService。

如果您調用stopSelf（），則IntentService隊列中正在等待的所有Intents都將被刪除。