com.google.zxing.qrcode.encoder.Encoder Java Exaples

Source File: UI.java From green_android with GNU General Public License v3.0

6 votes

public static Bitmap getQRCode(final String data) {
    final ByteMatrix matrix;
    try {
        matrix = Encoder.encode(data, ErrorCorrectionLevel.M).getMatrix();
    } catch (final WriterException e) {
        throw new RuntimeException(e);
    }

    final int height = matrix.getHeight() * SCALE;
    final int width = matrix.getWidth() * SCALE;
    final int min = height < width ? height : width;

    final Bitmap mQRCode = Bitmap.createBitmap(min, min, Bitmap.Config.ARGB_8888);
    for (int x = 0; x < min; ++x)
        for (int y = 0; y < min; ++y)
            mQRCode.setPixel(x, y, matrix.get(x / SCALE, y / SCALE) == 1 ? Color.BLACK : Color.TRANSPARENT);
    return mQRCode;
}

Source File: QRCodeWriter.java From letv with Apache License 2.0

6 votes

public BitMatrix encode(String contents, BarcodeFormat format, int width, int height, Map<EncodeHintType, ?> hints) throws WriterException {
    if (contents.length() == 0) {
        throw new IllegalArgumentException("Found empty contents");
    } else if (format != BarcodeFormat.QR_CODE) {
        throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
    } else if (width < 0 || height < 0) {
        throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' + height);
    } else {
        ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
        int quietZone = 4;
        if (hints != null) {
            ErrorCorrectionLevel requestedECLevel = (ErrorCorrectionLevel) hints.get(EncodeHintType.ERROR_CORRECTION);
            if (requestedECLevel != null) {
                errorCorrectionLevel = requestedECLevel;
            }
            Integer quietZoneInt = (Integer) hints.get(EncodeHintType.MARGIN);
            if (quietZoneInt != null) {
                quietZone = quietZoneInt.intValue();
            }
        }
        return renderResult(Encoder.encode(contents, errorCorrectionLevel, hints), width, height, quietZone);
    }
}

Source File: QrBitmap.java From GreenBits with GNU General Public License v3.0

6 votes

public Bitmap getQRCode() {
    if (mQRCode == null) {
        final ByteMatrix matrix;
        try {
            matrix = Encoder.encode(mData, ErrorCorrectionLevel.M).getMatrix();
        } catch (final WriterException e) {
            throw new RuntimeException(e);
        }
        final int height = matrix.getHeight() * SCALE;
        final int width = matrix.getWidth() * SCALE;
        mQRCode = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        for (int x = 0; x < width; ++x)
            for (int y = 0; y < height; ++y)
                mQRCode.setPixel(x, y, matrix.get(x / SCALE, y / SCALE) == 1 ? Color.BLACK : mBackgroundColor);
    }
    return mQRCode;
}

Source File: GenerateQRInteractor.java From iroha-android with Apache License 2.0

6 votes

@Override
protected Single<Bitmap> build(String amount) {
    return Single.create(emitter -> {
        String username = preferenceUtils.retrieveUsername();
        String qrText = username + "," + amount;
                    Map<EncodeHintType, String> hints = new HashMap<>();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        QRCode qrCode = Encoder.encode(qrText, ErrorCorrectionLevel.H, hints);
        final ByteMatrix byteMatrix = qrCode.getMatrix();
        final int width = byteMatrix.getWidth();
        final int height = byteMatrix.getHeight();
        final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                byte val = byteMatrix.get(x, y);
                bitmap.setPixel(x, y, val == 1 ? Color.BLACK : Color.WHITE);
            }
        }
        emitter.onSuccess(Bitmap.createScaledBitmap(bitmap, SIZE, SIZE, false));
    });
}

Source File: QRCodeWriter.java From QrCodeScanner with GNU General Public License v3.0

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.isEmpty()) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
      errorCorrectionLevel = ErrorCorrectionLevel.valueOf(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
    }
    if (hints.containsKey(EncodeHintType.MARGIN)) {
      quietZone = Integer.parseInt(hints.get(EncodeHintType.MARGIN).toString());
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: SendCodeGenerator.java From RipplePower with Apache License 2.0

5 votes

/**
 * This object renders a QR Code as a ByteMatrix 2D array of greyscale
 * values.
 * 
 * @author [email protected] (Daniel Switkin)
 */
public ByteMatrix encode(String contents) throws WriterException {

	if (contents == null || contents.length() == 0) {
		throw new IllegalArgumentException("Found empty contents");
	}

	Encoder.encode(contents, ErrorCorrectionLevel.L);
	return renderResult(code, QR_CODE_ELEMENT_MULTIPLE);
}

Source File: QRCodeWriter.java From RipplePower with Apache License 2.0

5 votes

@Override
public BitMatrix encode(String contents, BarcodeFormat format, int width, int height, Map<EncodeHintType, ?> hints)
		throws WriterException {

	if (contents.isEmpty()) {
		throw new IllegalArgumentException("Found empty contents");
	}

	if (format != BarcodeFormat.QR_CODE) {
		throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
	}

	if (width < 0 || height < 0) {
		throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' + height);
	}

	ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
	int quietZone = QUIET_ZONE_SIZE;
	if (hints != null) {
		ErrorCorrectionLevel requestedECLevel = (ErrorCorrectionLevel) hints.get(EncodeHintType.ERROR_CORRECTION);
		if (requestedECLevel != null) {
			errorCorrectionLevel = requestedECLevel;
		}
		Integer quietZoneInt = (Integer) hints.get(EncodeHintType.MARGIN);
		if (quietZoneInt != null) {
			quietZone = quietZoneInt;
		}
	}

	QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
	return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From reacteu-app with MIT License

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.length() == 0) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    ErrorCorrectionLevel requestedECLevel = (ErrorCorrectionLevel) hints.get(EncodeHintType.ERROR_CORRECTION);
    if (requestedECLevel != null) {
      errorCorrectionLevel = requestedECLevel;
    }
    Integer quietZoneInt = (Integer) hints.get(EncodeHintType.MARGIN);
    if (quietZoneInt != null) {
      quietZone = quietZoneInt;
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From barcodescanner-lib-aar with MIT License

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.isEmpty()) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
      errorCorrectionLevel = ErrorCorrectionLevel.valueOf(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
    }
    if (hints.containsKey(EncodeHintType.MARGIN)) {
      quietZone = Integer.parseInt(hints.get(EncodeHintType.MARGIN).toString());
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From weex with Apache License 2.0

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.isEmpty()) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
      errorCorrectionLevel = ErrorCorrectionLevel.valueOf(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
    }
    if (hints.containsKey(EncodeHintType.MARGIN)) {
      quietZone = Integer.parseInt(hints.get(EncodeHintType.MARGIN).toString());
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From analyzer-of-android-for-Apache-Weex with Apache License 2.0

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.isEmpty()) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
      errorCorrectionLevel = ErrorCorrectionLevel.valueOf(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
    }
    if (hints.containsKey(EncodeHintType.MARGIN)) {
      quietZone = Integer.parseInt(hints.get(EncodeHintType.MARGIN).toString());
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From ZXing-Orient with Apache License 2.0

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.isEmpty()) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    ErrorCorrectionLevel requestedECLevel = (ErrorCorrectionLevel) hints.get(EncodeHintType.ERROR_CORRECTION);
    if (requestedECLevel != null) {
      errorCorrectionLevel = requestedECLevel;
    }
    Integer quietZoneInt = (Integer) hints.get(EncodeHintType.MARGIN);
    if (quietZoneInt != null) {
      quietZone = quietZoneInt;
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From Tesseract-OCR-Scanner with Apache License 2.0

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.isEmpty()) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
      errorCorrectionLevel = ErrorCorrectionLevel.valueOf(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
    }
    if (hints.containsKey(EncodeHintType.MARGIN)) {
      quietZone = Integer.parseInt(hints.get(EncodeHintType.MARGIN).toString());
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From ShareBox with Apache License 2.0

5 votes

public BitMatrix encode(String contents, int width, int height, Map<EncodeHintType, ?> hints)
        throws WriterException {

    if (contents.isEmpty()) {
        throw new IllegalArgumentException("Found empty contents");
    }

    if (width < 0 || height < 0) {
        throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' + height);
    }

    ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
    int quietZone = QUIET_ZONE_SIZE;
    if (hints != null) {
        ErrorCorrectionLevel requestedECLevel = (ErrorCorrectionLevel) hints.get(EncodeHintType.ERROR_CORRECTION);
        if (requestedECLevel != null) {
            errorCorrectionLevel = requestedECLevel;
        }
        Integer quietZoneInt = (Integer) hints.get(EncodeHintType.MARGIN);
        if (quietZoneInt != null) {
            quietZone = quietZoneInt;
        }
    }

    QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
    return renderResult(code, width, height, quietZone);
}

Source File: QRCodeWriter.java From ScreenCapture with MIT License

5 votes

@Override
public BitMatrix encode(String contents,
                        BarcodeFormat format,
                        int width,
                        int height,
                        Map<EncodeHintType,?> hints) throws WriterException {

  if (contents.isEmpty()) {
    throw new IllegalArgumentException("Found empty contents");
  }

  if (format != BarcodeFormat.QR_CODE) {
    throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
  }

  if (width < 0 || height < 0) {
    throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x' +
        height);
  }

  ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
  int quietZone = QUIET_ZONE_SIZE;
  if (hints != null) {
    if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
      errorCorrectionLevel = ErrorCorrectionLevel.valueOf(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
    }
    if (hints.containsKey(EncodeHintType.MARGIN)) {
      quietZone = Integer.parseInt(hints.get(EncodeHintType.MARGIN).toString());
    }
  }

  QRCode code = Encoder.encode(contents, errorCorrectionLevel, hints);
  return renderResult(code, width, height, quietZone);
}

Source File: QrBitmap.java From green_android with GNU General Public License v3.0

5 votes

public Bitmap getQRCode() throws Exception {
    if (mQRCode == null) {
        final ByteMatrix matrix;
        matrix = Encoder.encode(mData, ErrorCorrectionLevel.M).getMatrix();
        final int height = matrix.getHeight() * SCALE;
        final int width = matrix.getWidth() * SCALE;
        mQRCode = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        for (int x = 0; x < width; ++x)
            for (int y = 0; y < height; ++y)
                mQRCode.setPixel(x, y, matrix.get(x / SCALE, y / SCALE) == 1 ? Color.BLACK : mBackgroundColor);
    }
    return mQRCode;
}

Source File: QRCodeWriter.java From MyBox with Apache License 2.0

5 votes

@Override
public BitMatrix encode(String contents,
        BarcodeFormat format,
        int width,
        int height,
        Map<EncodeHintType, ?> hints) throws WriterException {

    if (contents.isEmpty()) {
        throw new IllegalArgumentException("Found empty contents");
    }

    if (format != BarcodeFormat.QR_CODE) {
        throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format);
    }

    if (width < 0 || height < 0) {
        throw new IllegalArgumentException("Requested dimensions are too small: " + width + 'x'
                + height);
    }

    ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
    int quietZone = QUIET_ZONE_SIZE;
    if (hints != null) {
        if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
            errorCorrectionLevel = ErrorCorrectionLevel.valueOf(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
        }
        if (hints.containsKey(EncodeHintType.MARGIN)) {
            quietZone = Integer.parseInt(hints.get(EncodeHintType.MARGIN).toString());
        }
    }

    code = Encoder.encode(contents, errorCorrectionLevel, hints);
    return renderResult(width, height, quietZone);
}

Source File: DouYuBroadcastService.java From Alice-LiveMan with GNU Affero General Public License v3.0

5 votes

@Override
public InputStream getBroadcastCaptcha() throws IOException {
    Map<String, String> requestProperties = new HashMap<>();
    requestProperties.put("referer", "https://passport.douyu.com/index/login?passport_reg_callback=PASSPORT_REG_SUCCESS_CALLBACK&passport_login_callback=PASSPORT_LOGIN_SUCCESS_CALLBACK&passport_close_callback=PASSPORT_CLOSE_CALLBACK&passport_dp_callback=PASSPORT_DP_CALLBACK&type=login&client_id=1&state=https%3A%2F%2Fwww.douyu.com%2F&source=click_topnavi_login");
    requestProperties.put("x-requested-with", "XMLHttpRequest");
    String generateCodeJSON = HttpRequestUtil.downloadUrl(URI.create(URL_GENERATE_CODE), null, "client_id=1", requestProperties, StandardCharsets.UTF_8);
    JSONObject generateCode = JSON.parseObject(generateCodeJSON);
    if (generateCode.getInteger("error") == 0) {
        String url = generateCode.getJSONObject("data").getString("url");
        String code = generateCode.getJSONObject("data").getString("code");
        session.setAttribute(SESSION_ATTRIBUTE, code);
        try {
            QRCode qrCode = Encoder.encode(url, ErrorCorrectionLevel.M);
            BufferedImage qrCodeImage = new BufferedImage(qrCode.getMatrix().getWidth(), qrCode.getMatrix().getHeight(), BufferedImage.TYPE_BYTE_BINARY);
            for (int x = 0; x < qrCodeImage.getWidth(); x++) {
                for (int y = 0; y < qrCodeImage.getHeight(); y++) {
                    if (qrCode.getMatrix().get(x, y) == 0) {
                        qrCodeImage.setRGB(x, y, Color.WHITE.getRGB());
                    }
                }
            }
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ImageIO.write(qrCodeImage, "bmp", bos);
            return new ByteArrayInputStream(bos.toByteArray());
        } catch (WriterException e) {
            throw new IOException(e);
        }
    } else {
        log.error("获取qrcode失败:" + generateCodeJSON);
    }
    return null;
}

Source File: PrinterCommands.java From PrinterThermal-ESCPOS-Android with MIT License

4 votes

/**
 * Convert a string to QR Code byte array compatible with ESC/POS printer.
 *
 * @param data String data to convert in QR Code
 * @return Bytes contain the image in ESC/POS command
 */
public static byte[] QRCodeDataToBytes(String data, int size) {

    ByteMatrix byteMatrix = null;

    try {
        EnumMap<EncodeHintType, Object> hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

        QRCode code = Encoder.encode(data, ErrorCorrectionLevel.L, hints);
        byteMatrix = code.getMatrix();

    } catch (WriterException e) {
        e.printStackTrace();
    }

    if (byteMatrix == null) {
        return PrinterCommands.initImageCommand(0, 0);
    }

    int
            width = byteMatrix.getWidth(),
            height = byteMatrix.getHeight(),
            coefficient = Math.round((float) size / (float) width),
            imageWidth = width * coefficient,
            imageHeight = height * coefficient,
            bytesByLine = (int) Math.ceil(((float) imageWidth) / 8f),
            i = 8;

    if (coefficient < 1) {
        return PrinterCommands.initImageCommand(0, 0);
    }

    byte[] imageBytes = PrinterCommands.initImageCommand(bytesByLine, imageHeight);

    for (int y = 0; y < height; y++) {
        byte[] lineBytes = new byte[bytesByLine];
        int j = 0, multipleX = coefficient;
        boolean isBlack = false;
        for (int x = -1; x < width;) {
            StringBuilder stringBinary = new StringBuilder();
            for (int k = 0; k < 8; k++) {
                if(multipleX == coefficient) {
                    isBlack = ++x < width && byteMatrix.get(x, y) == 1;
                    multipleX = 0;
                }
                stringBinary.append(isBlack ? "1" : "0");
                ++multipleX;
            }
            lineBytes[j++] = (byte) Integer.parseInt(stringBinary.toString(), 2);
        }

        for (int multipleY = 0; multipleY < coefficient; ++multipleY) {
            System.arraycopy(lineBytes, 0, imageBytes, i, lineBytes.length);
            i += lineBytes.length;
        }
    }

    return imageBytes;
}

Source File: QRCodeGenerator.java From bither-desktop-java with Apache License 2.0

3 votes

public static ByteMatrix encode(String contents) throws WriterException {

        if (contents == null || contents.length() == 0) {
            throw new IllegalArgumentException("Found empty contents");
        }

        QRCode code = Encoder.encode(contents, ErrorCorrectionLevel.L);

        return renderResult(code, QR_CODE_ELEMENT_MULTIPLE);
    }

Source File: QRCodeGenerator.java From bither-desktop-java with Apache License 2.0

3 votes

public static ByteMatrix encode(String contents) throws WriterException {

        if (contents == null || contents.length() == 0) {
            throw new IllegalArgumentException("Found empty contents");
        }

        QRCode code = Encoder.encode(contents, ErrorCorrectionLevel.L);

        return renderResult(code, QR_CODE_ELEMENT_MULTIPLE);
    }

com.google.zxing.qrcode.encoder.Encoder Java Examples