How to show a notification without a sound java

Question

How can I make a notification that doesn\'t make a sound when I build it? I am building a notification, and my users don\'t like the fact that it makes a sound.

Answer 1

In android O, for me it worked with this settings in the notification:

                .setGroupAlertBehavior(GROUP_ALERT_SUMMARY)
                .setGroup("My group")
                .setGroupSummary(false)
                .setDefaults(NotificationCompat.DEFAULT_ALL)