Barcode Notification

public class NotificationUtils {

    private static final int WHITE = 0xFFFFFFFF;
    private static final int BLACK = 0xFF000000;
    private static final int DEFAULT_NOTIFICATION_ID = 0x1002;

    public static void notify(Context context, BarcodeModel barcodeModel) {

        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);

        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context);


        notificationBuilder.setContentTitle(context.getString(R.string.app_name));
        notificationBuilder.setSmallIcon(R.drawable.ic_launcher);
        if (barcodeModel.getName() != null)
            notificationBuilder.setContentText(barcodeModel.getName());
        Intent intent = new Intent(Constants.LAUNCH_WEAR_APP);

        try {
            Bitmap barcode  = encodeAsBitmap(barcodeModel, 600, 600);
            NotificationCompat.BigPictureStyle bigStyle = new NotificationCompat.BigPictureStyle();
            bigStyle.bigPicture(barcode);
            notificationBuilder.setStyle(bigStyle);
            intent.putExtra("barcode",barcode);
        } catch (WriterException e) {
            e.printStackTrace();
        }






        PendingIntent pendingIntent=PendingIntent.getActivity(context,0,intent,PendingIntent.FLAG_CANCEL_CURRENT);

        notificationBuilder.setContentIntent(pendingIntent);
        Notification notification = notificationBuilder.build();

        notificationManager.notify(barcodeModel.getBarcodeId(), notification);
    }

    public static Bitmap encodeAsBitmap(BarcodeModel barcodeModel, int img_width, int img_height) throws WriterException {
        String contentsToEncode = barcodeModel.getBarcodeValue();
        if (contentsToEncode == null) {
            return null;
        }
        Map<EncodeHintType, Object> hints = null;
        String encoding = guessAppropriateEncoding(contentsToEncode);
        if (encoding != null) {
            hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
            hints.put(EncodeHintType.CHARACTER_SET, encoding);
        }
        MultiFormatWriter writer = new MultiFormatWriter();
        BitMatrix result;
        try {
            if (barcodeModel.getBarcodeFormat()!=null){
            result = writer.encode(contentsToEncode, BarcodeFormat.valueOf(barcodeModel.getBarcodeFormat()), img_width, img_height, hints);}
            else{
                result = writer.encode(contentsToEncode, BarcodeFormat.CODE_128, img_width, img_height, hints);
            }
        } catch (IllegalArgumentException iae) {
            // Unsupported format
            return null;
        }
        int width = result.getWidth();
        int height = result.getHeight();
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            int offset = y * width;
            for (int x = 0; x < width; x++) {
                pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
            }
        }

        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }

    private static String guessAppropriateEncoding(CharSequence contents) {
        // Very crude at the moment
        for (int i = 0; i < contents.length(); i++) {
            if (contents.charAt(i) > 0xFF) {
                return "UTF-8";
            }
        }
        return null;
    }
}