有没有办法在应用程序完全关闭的情况下处理Android通知？

public class NotificationService extends Service {
    private NotificationManager mNotificationManager;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        // 构建通知的内容
        String title = "通知标题";
        String content = "通知内容";

        // 创建通知渠道
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel("channel_id", "channel_name", NotificationManager.IMPORTANCE_DEFAULT);
            mNotificationManager.createNotificationChannel(channel);
        }

        // 构建通知
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "channel_id")
                .setSmallIcon(R.drawable.notification_icon)
                .setContentTitle(title)
                .setContentText(content);

        // 显示通知
        mNotificationManager.notify(1, builder.build());

        return super.onStartCommand(intent, flags, startId);
    }

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