public class MyHandler extends NotificationsHandler {
    public static final int NOTIFICATION_ID = 1;
    private NotificationManager mNotificationManager;
    NotificationCompat.Builder builder;
    Context ctx;

    @Override
    public void onReceive(Context context, Bundle bundle) {
        ctx = context;
        String nhMessage = bundle.getString("message");
        sendNotification(nhMessage);
        if (MainActivity.isVisible) {
            MainActivity.mainActivity.ToastNotify(nhMessage);
        }
    }

    private void sendNotification(String msg) {

        Intent intent = new Intent(ctx, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        mNotificationManager = (NotificationManager)
                ctx.getSystemService(Context.NOTIFICATION_SERVICE);

        PendingIntent contentIntent = PendingIntent.getActivity(ctx, (int)(System.currentTimeMillis()/1000),
                intent, PendingIntent.FLAG_ONE_SHOT);

        NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle();
        //bigTextStyle.setSummaryText("...");

        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder mBuilder =
                new NotificationCompat.Builder(ctx)
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setLargeIcon(BitmapFactory.decodeResource(ctx.getResources(), R.mipmap.ic_launcher))
                        //.setLargeIcon(R..ic_launcher)
                        .setContentTitle("Notification Hub Demo")
                        .setStyle(bigTextStyle
                                .bigText(msg))
                        .setSound(defaultSoundUri)
                        .setDefaults(Notification.FLAG_NO_CLEAR)
                        .setContentText(msg);

        mBuilder.setContentIntent(contentIntent);
        mNotificationManager.notify((int)(System.currentTimeMillis()/1000), mBuilder.build());
    }