Encode data with Android XZing

encodexzing.java

    //Global Objects and variables
    ImageView imgBarcode;
    private static final int WHITE = 0xFFFFFFFF;
    private static final int BLACK = 0xFF000000;
    Bitmap bmp;
    
    //Implementation
    bmp = encodeAsBitmap("1234567890", BarcodeFormat.CODE_128, 800, 200);
    imgBarcode.setImageBitmap(bmp);
    
    
    //Method Encode
    public Bitmap encodeAsBitmap(String contents, BarcodeFormat format, int imgWidth, int imgHeight) {
        if (contents == null) {
            return null;
        }
        Map<EncodeHintType, Object> hints = null;
        String encoding = guessAppropriateEncoding(contents);
        if (encoding != null) {
            hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
            hints.put(EncodeHintType.CHARACTER_SET, encoding);
        }
        MultiFormatWriter writer = new MultiFormatWriter();
        BitMatrix result;
        try {
            result = writer.encode(contents, format, imgWidth, imgHeight, hints);
        } catch (WriterException e) {
            e.printStackTrace();
            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) {
        for (int i = 0; i < contents.length(); i++) {
            if (contents.charAt(i) > 0xFF) {
                return "UTF-8";
            }
        }
        return null;
    }