Disable notification sound on Android O

I try to get rid of the notification sound in below method.

I was able to reduced it to only go off once but it should be completely silent in Android O and lower versions.

I searched a long time on stackoverflow and google but till now nothing completely works.

Any help is appreciated.

public void showUpdateProgressNotification(int id, String appName, int progress, String status, long downloadStart) {

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        String NOTIFICATION_CHANNEL_ID = "my_channel_id_01";

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel notificationChannel = new NotificationChannel
                    (NOTIFICATION_CHANNEL_ID, "Test Notifications", NotificationManager.IMPORTANCE_LOW);
            notificationChannel.setSound(null, null);

            // Configure the notification channel.
            notificationChannel.setDescription("Channel test");
            notificationManager.createNotificationChannel(notificationChannel);
        }

        Intent cancelIntent = new Intent(ACTION_FILE_CANCEL);
        cancelIntent.putExtra("id", id);
        PendingIntent cancel = PendingIntent.getBroadcast(this, ACTION_FILE_CANCEL.hashCode() + id,
                cancelIntent, PendingIntent.FLAG_CANCEL_CURRENT);

        NotificationCompat.Builder notification = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
                .setContentTitle(appName)
                .setContentText(status)
                .setSmallIcon(android.R.drawable.stat_sys_download)
                .setDefaults(0)
                .setLargeIcon(BitmapFactory.decodeResource(MyApplication_.getInstance().getResources(), R.mipmap.ic_launcher))
                .setProgress(100, progress, progress == 0)
                .setWhen(downloadStart)
                .setContentIntent(cancel)
                .setGroup(GROUP_KEY)
                .addAction(R.drawable.ic_close_black_24dp, "Cancel", cancel)
                .setColor(MyApplication_.getInstance().getResources().getColor(R.color.apps_color))
                .setOnlyAlertOnce(true);

        NotificationCompat.InboxStyle inboxStyle =
                new NotificationCompat.InboxStyle();
        inboxStyle.addLine(status);
        notification.setStyle(inboxStyle);

        notificationManager.notify(id, notification.build());

        addNotification(id);
 }

I figured it out after some more research.

This is the vital part:

//Configure the notification channel, NO SOUND
notificationChannel.setDescription("no sound");
notificationChannel.setSound(null,null); <---- ignore sound
notificationChannel.enableLights(false);
notificationChannel.setLightColor(Color.BLUE);
notificationChannel.enableVibration(false);

At first on implementing this, it still did not work but after uninstalling my app, and reinstall it everything was fine.

If any one needs it, here is the correct code:

public void showUpdateProgressNotification(int id, String appName, int progress, String status, long downloadStart) {

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        String NOTIFICATION_CHANNEL_ID = "my_channel_id_01";

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel notificationChannel = new NotificationChannel(
                    NOTIFICATION_CHANNEL_ID, "My app no sound", NotificationManager.IMPORTANCE_LOW
            );

            //Configure the notification channel, NO SOUND
            notificationChannel.setDescription("no sound");
            notificationChannel.setSound(null,null);
            notificationChannel.enableLights(false);
            notificationChannel.setLightColor(Color.BLUE);
            notificationChannel.enableVibration(false);
            notificationManager.createNotificationChannel(notificationChannel);
        }

        Intent cancelIntent = new Intent(ACTION_FILE_CANCEL);
        cancelIntent.putExtra("id", id);
        PendingIntent cancel = PendingIntent.getBroadcast(this, ACTION_FILE_CANCEL.hashCode() + id,
                cancelIntent, PendingIntent.FLAG_CANCEL_CURRENT);

        NotificationCompat.Builder notification = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
                .setContentTitle(appName)
                .setContentText(status)
                .setSmallIcon(android.R.drawable.stat_sys_download)
                .setDefaults(0)
                .setLargeIcon(BitmapFactory.decodeResource(MyApplication_.getInstance().getResources(), R.mipmap.ic_launcher))
                .setProgress(100, progress, progress == 0)
                .setWhen(downloadStart)
                .setContentIntent(cancel)
                .setGroup(GROUP_KEY)
                .addAction(R.drawable.ic_close_black_24dp, "Cancel", cancel)
                .setColor(MyApplication_.getInstance().getResources().getColor(R.color.apps_color));

        NotificationCompat.InboxStyle inboxStyle =
                new NotificationCompat.InboxStyle();
        inboxStyle.addLine(status);
        notification.setStyle(inboxStyle);

        notificationManager.notify(id, notification.build());

        addNotification(id);
    }