How to create a barcode and convert it to Bitmap using the new Google Vision API?

Question

How to generate a barcode and convert it to Bitmap using the new Google Vision API?

Barcode barcode = new Barcode(); Barcode.Email email = new Barcode.Email(); email.address = " [e-mail] "; email.subject = "My Subject; email.body = "My body content."; barcode.email = email; 

// Perform Bitmap conversion barcodeImage = barcodeToBitmap (barcode); // I know this part.

Answer 1

You can detect your barcodes using the Google Vision API, and then use ZXing to generate barcodes. You can try something like this, it uses the zxing library:

 public static Bitmap getBitmap(String barcode, int barcodeType, int width, int height) { Bitmap barcodeBitmap = null; BarcodeFormat barcodeFormat = convertToZXingFormat(barcodeType); try { barcodeBitmap = encodeAsBitmap(barcode, barcodeFormat, width, height); } catch (WriterException e) { e.printStackTrace(); } return barcodeBitmap; } private static BarcodeFormat convertToZXingFormat(int format) { switch (format) { case 8: return BarcodeFormat.CODABAR; case 1: return BarcodeFormat.CODE_128; case 2: return BarcodeFormat.CODE_39; case 4: return BarcodeFormat.CODE_93; case 32: return BarcodeFormat.EAN_13; case 64: return BarcodeFormat.EAN_8; case 128: return BarcodeFormat.ITF; case 512: return BarcodeFormat.UPC_A; case 1024: return BarcodeFormat.UPC_E; //default 128? default: return BarcodeFormat.CODE_128; } } /************************************************************** * getting from com.google.zxing.client.android.encode.QRCodeEncoder * * See the sites below * http://code.google.com/p/zxing/ * http://code.google.com/p/zxing/source/browse/trunk/android/src/com/google/zxing/client/android/encode/EncodeActivity.java * http://code.google.com/p/zxing/source/browse/trunk/android/src/com/google/zxing/client/android/encode/QRCodeEncoder.java */ private static final int WHITE = 0xFFFFFFFF; private static final int BLACK = 0xFF000000; private static Bitmap encodeAsBitmap(String contents, BarcodeFormat format, int img_width, int img_height) throws WriterException { if (contents == null) { return null; } Map<EncodeHintType, Object> hints = null; String encoding = guessAppropriateEncoding(contents); if (encoding != null) { hints = new EnumMap<>(EncodeHintType.class); hints.put(EncodeHintType.CHARACTER_SET, encoding); } MultiFormatWriter writer = new MultiFormatWriter(); BitMatrix result; try { result = writer.encode(contents, 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 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; } 

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