Уведомления на иконке приложения. как закрепить

 private void sendNotification(String messageBody) {
        NotificationManager notificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        android.support.v4.app.NotificationCompat.Builder mBuilder = new android.support.v4.app.NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_action_star)
                .setContentTitle(messageBody)
                .setContentText(messageBody);
        Intent intent = new Intent(this, MainActivity.class);
        intent.putExtra("action", "push");
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addNextIntent(intent);
        PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_ONE_SHOT);
        mBuilder.setContentIntent(resultPendingIntent);
        notificationManager.notify(NOTIFICATION_ID, mBuilder.build());
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, 0);
        mBuilder.setContentIntent(contentIntent);
        Notification notifi = mBuilder.build();
        notifi.defaults |= Notification.DEFAULT_ALL;
        notifi.flags |= Notification.FLAG_AUTO_CANCEL;
        notificationManager.notify(NOTIFICATION_ID, notifi);
    }