The foreground Service notification bar progress update, solve the problem that Android O (8.0) Notification does not display

1. The notification bar is resident to ensure that the Service is the foreground process to prevent the service from being killed

2. Use the standard notification bar style

notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    LogUtil.d(TAG, "onStartCommand");
    final Integer notificationID = 100;
    //Set notification information:
    final NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(getApplicationContext(), NOTIFICATION_CHANNEL);
    notificationBuilder.setOngoing(true)
            .setSmallIcon(R.drawable.ic_launcher_round)
            .setContentTitle("Xiaomi Video")
            .setContentText("The Legend of Zhen Huan, Old Boy, etc. are being downloaded")
            .setProgress(100, 0, false);
    //Send the notification:
    final Notification notification = notificationBuilder.build();
    startForeground(notificationID, notification);
    UIThread.uiPost(new Runnable() {
        @Override
        public void run() {
            if (progress == 100) {
                stopForeground(true);
                return;
            }
            notificationBuilder.setProgress(100, progress++, false);
            Notification notification = notificationBuilder.build();
            notificationManager.notify(notificationID, notification);
            UIThread.uiPost(this,100);
        }
    }, 100);
    return START_STICKY;
}

To solve the problem that the Android O (8.0) notification bar does not display, you need to set NotificationChannel for NotificationManager

/**
 * 8.0 and above need to increase the channel
 */
@RequiresApi(Build.VERSION_CODES.O)
private fun createChannelIfNeeded() {
    if (Build.VERSION.SDK_INT >= 26) {
        val channel = NotificationChannel(NOTIFICATION_CHANNEL, "Xiaomi Video", NotificationManager.IMPORTANCE_LOW)
        channel.description = "Download"
        channel.enableLights(false)
        channel.enableVibration(false)
        //channel.importance = NotificationManager.IMPORTANCE_LOW //Set to low, there will be no sound in the notification bar
        mNotificationManager.createNotificationChannel(channel)
    }
}