Generate ean13 barcode with Zxing library which shows code number below it Android

问题

I'm using Zxing library to generate a barcode bitmap from a String numeric code with this code:

public Bitmap encodeAsBitmap(String contents, BarcodeFormat format, int img_width, int img_height) throws WriterException {
    String contentsToEncode = contents;
    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 {
        result = writer.encode(contentsToEncode, format, 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 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;
}

It works well but it only generates the barcode in the image, no numbers within it. The problem comes when I want to paint it in an ImageView with the numbers below as we usually see them in barcodes. I tried with a textview but they are too small or too big, depending on the screen and the ImageView size.

The question is, is there a way of including code numbers below barcode in the Bitmap with the Zxing library? Or is there any other easy solution as resizable text in TextView or sth?

Thanks in advance!

来源：https://stackoverflow.com/questions/36494709/generate-ean13-barcode-with-zxing-library-which-shows-code-number-below-it-andro

标签

android

barcode

zxing