Examples with WriterException com.google.zxing.WriterException used on opensource projects

Example 21 with WriterException

use of com.google.zxing.WriterException in project CloudReader by youlookwhat.

the class QRCodeUtil method createQRImage.

/**
     * 生成二维码Bitmap
     *
     * @param content   内容
     * @param widthPix  图片宽度
     * @param heightPix 图片高度
     * @param logoBm    二维码中心的Logo图标（可以为null）
     * @param filePath  用于存储二维码图片的文件路径
     * @return 生成二维码及保存文件是否成功
     */
public static boolean createQRImage(String content, int widthPix, int heightPix, Bitmap logoBm, String filePath) {
    try {
        if (content == null || "".equals(content)) {
            return false;
        }
        //配置参数
        Map<EncodeHintType, Object> hints = new HashMap<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //容错级别
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        //设置空白边距的宽度
        //            hints.put(EncodeHintType.MARGIN, 2); //default is 4
        // 图像数据转换，使用了矩阵转换
        BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, widthPix, heightPix, hints);
        int[] pixels = new int[widthPix * heightPix];
        // 两个for循环是图片横列扫描的结果
        for (int y = 0; y < heightPix; y++) {
            for (int x = 0; x < widthPix; x++) {
                if (bitMatrix.get(x, y)) {
                    pixels[y * widthPix + x] = 0xff000000;
                } else {
                    pixels[y * widthPix + x] = 0xffffffff;
                }
            }
        }
        // 生成二维码图片的格式，使用ARGB_8888
        Bitmap bitmap = Bitmap.createBitmap(widthPix, heightPix, Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, widthPix, 0, 0, widthPix, heightPix);
        if (logoBm != null) {
            bitmap = addLogo(bitmap, logoBm);
        }
        //必须使用compress方法将bitmap保存到文件中再进行读取。直接返回的bitmap是没有任何压缩的，内存消耗巨大！
        return bitmap != null && bitmap.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(filePath));
    } catch (WriterException | IOException e) {
        e.printStackTrace();
    }
    return false;
}

Example 22 with WriterException

use of com.google.zxing.WriterException in project zxing by zxing.

the class ChartServlet method doEncode.

private static void doEncode(ServletRequest request, HttpServletResponse response, boolean isPost) throws IOException {
    ChartServletRequestParameters parameters;
    try {
        parameters = doParseParameters(request, isPost);
    } catch (IllegalArgumentException | NullPointerException e) {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST, e.toString());
        return;
    }
    Map<EncodeHintType, Object> hints = new EnumMap<>(EncodeHintType.class);
    hints.put(EncodeHintType.MARGIN, parameters.getMargin());
    if (!StandardCharsets.ISO_8859_1.equals(parameters.getOutputEncoding())) {
        // Only set if not QR code default
        hints.put(EncodeHintType.CHARACTER_SET, parameters.getOutputEncoding().name());
    }
    hints.put(EncodeHintType.ERROR_CORRECTION, parameters.getEcLevel());
    BitMatrix matrix;
    try {
        matrix = new QRCodeWriter().encode(parameters.getText(), BarcodeFormat.QR_CODE, parameters.getWidth(), parameters.getHeight(), hints);
    } catch (WriterException we) {
        response.sendError(HttpServletResponse.SC_BAD_REQUEST, we.toString());
        return;
    }
    ByteArrayOutputStream pngOut = new ByteArrayOutputStream();
    MatrixToImageWriter.writeToStream(matrix, "PNG", pngOut);
    byte[] pngData = pngOut.toByteArray();
    response.setContentType("image/png");
    response.setContentLength(pngData.length);
    response.setHeader("Cache-Control", "public");
    response.getOutputStream().write(pngData);
}

Example 23 with WriterException

use of com.google.zxing.WriterException in project zxing by zxing.

the class EncoderTestCase method testAppendBytes.

@Test
public void testAppendBytes() throws WriterException {
    // Should use appendNumericBytes.
    // 1 = 01 = 0001 in 4 bits.
    BitArray bits = new BitArray();
    Encoder.appendBytes("1", Mode.NUMERIC, bits, Encoder.DEFAULT_BYTE_MODE_ENCODING);
    assertEquals(" ...X", bits.toString());
    // Should use appendAlphanumericBytes.
    // A = 10 = 0xa = 001010 in 6 bits
    bits = new BitArray();
    Encoder.appendBytes("A", Mode.ALPHANUMERIC, bits, Encoder.DEFAULT_BYTE_MODE_ENCODING);
    assertEquals(" ..X.X.", bits.toString());
    // Lower letters such as 'a' cannot be encoded in MODE_ALPHANUMERIC.
    try {
        Encoder.appendBytes("a", Mode.ALPHANUMERIC, bits, Encoder.DEFAULT_BYTE_MODE_ENCODING);
    } catch (WriterException we) {
    // good
    }
    // Should use append8BitBytes.
    // 0x61, 0x62, 0x63
    bits = new BitArray();
    Encoder.appendBytes("abc", Mode.BYTE, bits, Encoder.DEFAULT_BYTE_MODE_ENCODING);
    assertEquals(" .XX....X .XX...X. .XX...XX", bits.toString());
    // Anything can be encoded in QRCode.MODE_8BIT_BYTE.
    Encoder.appendBytes("\0", Mode.BYTE, bits, Encoder.DEFAULT_BYTE_MODE_ENCODING);
    // Should use appendKanjiBytes.
    // 0x93, 0x5f
    bits = new BitArray();
    Encoder.appendBytes(shiftJISString(new byte[] { (byte) 0x93, 0x5f }), Mode.KANJI, bits, Encoder.DEFAULT_BYTE_MODE_ENCODING);
    assertEquals(" .XX.XX.. XXXXX", bits.toString());
}

Example 24 with WriterException

use of com.google.zxing.WriterException in project zxing by zxing.

the class EncoderTestCase method testAppendAlphanumericBytes.

@Test
public void testAppendAlphanumericBytes() throws WriterException {
    // A = 10 = 0xa = 001010 in 6 bits
    BitArray bits = new BitArray();
    Encoder.appendAlphanumericBytes("A", bits);
    assertEquals(" ..X.X.", bits.toString());
    // AB = 10 * 45 + 11 = 461 = 0x1cd = 00111001101 in 11 bits
    bits = new BitArray();
    Encoder.appendAlphanumericBytes("AB", bits);
    assertEquals(" ..XXX..X X.X", bits.toString());
    // ABC = "AB" + "C" = 00111001101 + 001100
    bits = new BitArray();
    Encoder.appendAlphanumericBytes("ABC", bits);
    assertEquals(" ..XXX..X X.X..XX. .", bits.toString());
    // Empty.
    bits = new BitArray();
    Encoder.appendAlphanumericBytes("", bits);
    assertEquals("", bits.toString());
    // Invalid data.
    try {
        Encoder.appendAlphanumericBytes("abc", new BitArray());
    } catch (WriterException we) {
    // good
    }
}

Example 25 with WriterException

use of com.google.zxing.WriterException in project zxing by zxing.

the class PDF417HighLevelEncoder method determineConsecutiveBinaryCount.

/**
   * Determines the number of consecutive characters that are encodable using binary compaction.
   *
   * @param msg      the message
   * @param startpos the start position within the message
   * @param encoding the charset used to convert the message to a byte array
   * @return the requested character count
   */
private static int determineConsecutiveBinaryCount(String msg, int startpos, Charset encoding) throws WriterException {
    CharsetEncoder encoder = encoding.newEncoder();
    int len = msg.length();
    int idx = startpos;
    while (idx < len) {
        char ch = msg.charAt(idx);
        int numericCount = 0;
        while (numericCount < 13 && isDigit(ch)) {
            numericCount++;
            //textCount++;
            int i = idx + numericCount;
            if (i >= len) {
                break;
            }
            ch = msg.charAt(i);
        }
        if (numericCount >= 13) {
            return idx - startpos;
        }
        ch = msg.charAt(idx);
        if (!encoder.canEncode(ch)) {
            throw new WriterException("Non-encodable character detected: " + ch + " (Unicode: " + (int) ch + ')');
        }
        idx++;
    }
    return idx - startpos;
}