通知声音间隔

Question

如何把通知声音之间的间隔，当我收到通知然后，我必须在环之间放0.5秒的间隙， 这里1代表环（.mp3格式）和 .5代表差距。 1 + 0.5 + 1 + 0.5 + 1 = 4秒

代码：我正在使用FCM，在收到的消息中我有以下代码，我的coins.mp3，哔哔1秒钟，我想要发出3次哔声，间隔为0.5秒，每次发出哔哔声

Uri defaultSoundUri= Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.coins);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.splash_logo)
                .setContentTitle("Logizo")
                .setContentText("Order Status Changed to "+messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationBuilder.getNotification().flags |= Notification.FLAG_AUTO_CANCEL;
        notificationManager.notify(NOTIFICATION_ID/* ID of notification */, notificationBuilder.build());
        try {
            foreground = new ForegroundCheckTask().execute(this).get();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
        MainActivity.removeNotificationsFromStatusBar(NOTIFICATION_ID,this,foreground);