如何确认服务是前台服务

我有一个服务播放音乐(媒体播放器),它的工作很好。

1. 如何确认这个服务是前台服务?

2. 如何模拟系统负载并检查服务是否将被终止?

   这是我的密码。

   public int onStartCommand(Intent Intent,int flags,int startId){ 构建通知(PlaybackStatus.PLAYING);
   }

   私有void buildNotification(PlaybackStatus PlaybackStatus){

   final int NOTIFY_ID = 1002;
   String aMessage="";
   String name = "my_package_channel";
   String id = "my_package_channel_1"; // The user-visible name of the channel.
   String description = "my_package_first_channel"; // The user-visible description of the channel.
   
   Intent intent;
   PendingIntent pendingIntent;
   NotificationCompat.Builder builder;
   
   if (notifManager == null) {
       notifManager =
               (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
   }
   
   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
       int importance = NotificationManager.IMPORTANCE_HIGH;
       NotificationChannel mChannel = notifManager.getNotificationChannel(id);
       if (mChannel == null) {
           mChannel = new NotificationChannel(id, name, importance);
           mChannel.setDescription(description);
           notifManager.createNotificationChannel(mChannel);
       }
       builder = new NotificationCompat.Builder(this, id);
   
       intent = new Intent(this, NotificationReturnSlot.class);
       pendingIntent = PendingIntent.getActivity(this, 1, intent, 0);
   
       builder.setContentTitle(aMessage)  // required
               .setSmallIcon(R.mipmap.ic_launcher)
               .setContentText(this.getString(R.string.app_name))  // required
               .setAutoCancel(false)
               .setContentIntent(pendingIntent)
               .setVibrate(new long[]{0L})
       ;
   } else {
   
       builder = new NotificationCompat.Builder(this);
   
       intent = new Intent(this, NotificationReturnSlot.class);
       pendingIntent = PendingIntent.getActivity(this, 1, intent, 0);
   
       builder.setContentTitle(aMessage)                           // required
               .setSmallIcon(R.mipmap.ic_launcher)
               .setContentText(this.getString(R.string.app_name))  // required
               .setAutoCancel(false)
               .setContentIntent(pendingIntent)
               .setVibrate(new long[]{0L})
               .setPriority(Notification.PRIORITY_HIGH);
   } 
   int mId = 1489;
   startForeground(mId, builder.build());
   

   }