i ve implemented push notification with other BaaS service ,when device recive notification play a sound,its possible have the same effect whit backendless/google push notification service
Playing a sound as a result of a push notification on Android is considered custom functionality - the OS does not have a built in mechanism for it. You can accomplish it with Backendless, by creating a custom implementation of the broadcast receiver class. You can extend BackendlessBroadcastReceiver and put the logic for sound playback in there.
ok i ve implemented it whit your coworker suggestion but i cant delete this duplicate question sorry