pre-o-notify.java

@TargetApi(25)
    public static class PreO {
 
        public static void createNotification(Service context) {
            // Create Pending Intents.
            PendingIntent piLaunchMainActivity = 
                getLaunchActivityPI(context);
            PendingIntent piStopService = getStopServicePI(context);
 
            // Action to stop the service.
            NotificationCompat.Action stopAction =
                new NotificationCompat.Action.Builder(
                    STOP_ACTION_ICON,
                    getNotificationStopActionText(context),
                    piStopService)
                    .build();
 
            // Create a notification.
            Notification mNotification =
                new NotificationCompat.Builder(context)
                    .setContentTitle(getNotificationTitle(context))
                    .setContentText(getNotificationContent(context))
                    .setSmallIcon(SMALL_ICON)
                    .setContentIntent(piLaunchMainActivity)
                    .addAction(stopAction)
                    .setStyle(new NotificationCompat.BigTextStyle())
                    .build();
 
            context.startForeground(
                ONGOING_NOTIFICATION_ID, mNotification);
        }
    }