public class ForegroundService extends Service {
  
  private static final String TAG = ForegroundService.class.getSimpleName();

 @Override
  public void onCreate() {
    super.onCreate();
    Log.e(TAG, "onCreate");
  }
  
  @Nullable
  @Override
  public IBinder onBind(Intent intent) {
    Log.e(TAG, "onBind");
    return null;
  }

  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
    Log.e(TAG, "onStartCommand");
    return super.onStartCommand(intent, flags, startId);
  }

  @Override
  public void onDestroy() {
    Log.e(TAG, "onDestroy");
    super.onDestroy();
  }  
}

/**
 * 創(chuàng)建服務(wù)通知
 */
private Notification createForegroundNotification() {
  NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

  // 唯一的通知通道的id.
  String notificationChannelId = "notification_channel_id_01";

  // Android8.0以上的系統(tǒng)，新建消息通道
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    //用戶可見的通道名稱
    String channelName = "Foreground Service Notification";
    //通道的重要程度
    int importance = NotificationManager.IMPORTANCE_HIGH;
    NotificationChannel notificationChannel = new NotificationChannel(notificationChannelId, channelName, importance);
    notificationChannel.setDescription("Channel description");
    //LED燈
    notificationChannel.enableLights(true);
    notificationChannel.setLightColor(Color.RED);
    //震動
    notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
    notificationChannel.enableVibration(true);
    if (notificationManager != null) {
      notificationManager.createNotificationChannel(notificationChannel);
    }
  }

  NotificationCompat.Builder builder = new NotificationCompat.Builder(this, notificationChannelId);
  //通知小圖標
  builder.setSmallIcon(R.drawable.ic_launcher);
  //通知標題
  builder.setContentTitle("ContentTitle");
  //通知內(nèi)容
  builder.setContentText("ContentText");
  //設(shè)定通知顯示的時間
  builder.setWhen(System.currentTimeMillis());
  //設(shè)定啟動的內(nèi)容
  Intent activityIntent = new Intent(this, NotificationActivity.class);
  PendingIntent pendingIntent = PendingIntent.getActivity(this, 1, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);
  builder.setContentIntent(pendingIntent);

  //創(chuàng)建通知并返回
  return builder.build();
}

@Override
public void onCreate() {
  super.onCreate();
  Log.e(TAG, "onCreate");
  // 獲取服務(wù)通知
  Notification notification = createForegroundNotification();
  //將服務(wù)置于啟動狀態(tài) ,NOTIFICATION_ID指的是創(chuàng)建的通知的ID
  startForeground(NOTIFICATION_ID, notification);
}

@Override
public void onDestroy() {
  Log.e(TAG, "onDestroy");
  // 標記服務(wù)關(guān)閉
  ForegroundService.serviceIsLive = false;
  // 移除通知
  stopForeground(true);
  super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
  Log.e(TAG, "onStartCommand");
  // 標記服務(wù)啟動
  ForegroundService.serviceIsLive = true;
  // 數(shù)據(jù)獲取
  String data = intent.getStringExtra("Foreground");
  Toast.makeText(this, data, Toast.LENGTH_SHORT).show();
  return super.onStartCommand(intent, flags, startId);
}

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

//啟動服務(wù)
if (!ForegroundService.serviceIsLive) {
  // Android 8.0使用startForegroundService在前臺啟動新服務(wù)
  mForegroundService = new Intent(this, ForegroundService.class);
  mForegroundService.putExtra("Foreground", "This is a foreground service.");
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    startForegroundService(mForegroundService);
  } else {
    startService(mForegroundService);
  }
} else {
  Toast.makeText(this, "前臺服務(wù)正在運行中...", Toast.LENGTH_SHORT).show();
}

//停止服務(wù)
mForegroundService = new Intent(this, ForegroundService.class);
stopService(mForegroundService);