set Sound
Set a custom sound uri that push notifications will use. On Android 8.0, this setting will be applied to the default android.app.NotificationChannel that Batch registers, meaning that you won't be able to change it after the first notification. If you use your own channel, this method will have no effect.
Parameters
uri
uri of the resource (see Notification.Builder.setSound for more details)null if you want to use the default notification sound