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

Example 26 with WriterException

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

the class Encoder method interleaveWithECBytes.

/**
   * Interleave "bits" with corresponding error correction bytes. On success, store the result in
   * "result". The interleave rule is complicated. See 8.6 of JISX0510:2004 (p.37) for details.
   */
static BitArray interleaveWithECBytes(BitArray bits, int numTotalBytes, int numDataBytes, int numRSBlocks) throws WriterException {
    // "bits" must have "getNumDataBytes" bytes of data.
    if (bits.getSizeInBytes() != numDataBytes) {
        throw new WriterException("Number of bits and data bytes does not match");
    }
    // Step 1.  Divide data bytes into blocks and generate error correction bytes for them. We'll
    // store the divided data bytes blocks and error correction bytes blocks into "blocks".
    int dataBytesOffset = 0;
    int maxNumDataBytes = 0;
    int maxNumEcBytes = 0;
    // Since, we know the number of reedsolmon blocks, we can initialize the vector with the number.
    Collection<BlockPair> blocks = new ArrayList<>(numRSBlocks);
    for (int i = 0; i < numRSBlocks; ++i) {
        int[] numDataBytesInBlock = new int[1];
        int[] numEcBytesInBlock = new int[1];
        getNumDataBytesAndNumECBytesForBlockID(numTotalBytes, numDataBytes, numRSBlocks, i, numDataBytesInBlock, numEcBytesInBlock);
        int size = numDataBytesInBlock[0];
        byte[] dataBytes = new byte[size];
        bits.toBytes(8 * dataBytesOffset, dataBytes, 0, size);
        byte[] ecBytes = generateECBytes(dataBytes, numEcBytesInBlock[0]);
        blocks.add(new BlockPair(dataBytes, ecBytes));
        maxNumDataBytes = Math.max(maxNumDataBytes, size);
        maxNumEcBytes = Math.max(maxNumEcBytes, ecBytes.length);
        dataBytesOffset += numDataBytesInBlock[0];
    }
    if (numDataBytes != dataBytesOffset) {
        throw new WriterException("Data bytes does not match offset");
    }
    BitArray result = new BitArray();
    // First, place data blocks.
    for (int i = 0; i < maxNumDataBytes; ++i) {
        for (BlockPair block : blocks) {
            byte[] dataBytes = block.getDataBytes();
            if (i < dataBytes.length) {
                result.appendBits(dataBytes[i], 8);
            }
        }
    }
    // Then, place error correction blocks.
    for (int i = 0; i < maxNumEcBytes; ++i) {
        for (BlockPair block : blocks) {
            byte[] ecBytes = block.getErrorCorrectionBytes();
            if (i < ecBytes.length) {
                result.appendBits(ecBytes[i], 8);
            }
        }
    }
    if (numTotalBytes != result.getSizeInBytes()) {
        // Should be same.
        throw new WriterException("Interleaving error: " + numTotalBytes + " and " + result.getSizeInBytes() + " differ.");
    }
    return result;
}

Example 27 with WriterException

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

the class MatrixUtil method makeTypeInfoBits.

// Make bit vector of type information. On success, store the result in "bits" and return true.
// Encode error correction level and mask pattern. See 8.9 of
// JISX0510:2004 (p.45) for details.
static void makeTypeInfoBits(ErrorCorrectionLevel ecLevel, int maskPattern, BitArray bits) throws WriterException {
    if (!QRCode.isValidMaskPattern(maskPattern)) {
        throw new WriterException("Invalid mask pattern");
    }
    int typeInfo = (ecLevel.getBits() << 3) | maskPattern;
    bits.appendBits(typeInfo, 5);
    int bchCode = calculateBCHCode(typeInfo, TYPE_INFO_POLY);
    bits.appendBits(bchCode, 10);
    BitArray maskBits = new BitArray();
    maskBits.appendBits(TYPE_INFO_MASK_PATTERN, 15);
    bits.xor(maskBits);
    if (bits.getSize() != 15) {
        // Just in case.
        throw new WriterException("should not happen but we got: " + bits.getSize());
    }
}

Example 28 with WriterException

use of com.google.zxing.WriterException in project QRCode by 5peak2me.

the class MainActivity method onClick.

@Override
public void onClick(View v) {
    final int id = v.getId();
    switch(id) {
        case R.id.btn1:
            String content = et.getText().toString().trim();
            try {
                if (!TextUtils.isEmpty(content)) {
                    Bitmap bitmap = Create2DCode(content);
                    iv.setImageBitmap(bitmap);
                } else {
                    Toast.makeText(MainActivity.this, "请输入要生成的字符串", Toast.LENGTH_SHORT).show();
                }
            } catch (WriterException e) {
                e.printStackTrace();
            }
            break;
        case R.id.btn2:
            startActivity(new Intent(MainActivity.this, CaptureActivity.class));
            break;
        default:
            break;
    }
}

Example 29 with WriterException

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

the class QRCodeEncoder method encodeFromStreamExtra.

// Handles send intents from the Contacts app, retrieving a contact as a VCARD.
private void encodeFromStreamExtra(Intent intent) throws WriterException {
    format = BarcodeFormat.QR_CODE;
    Bundle bundle = intent.getExtras();
    if (bundle == null) {
        throw new WriterException("No extras");
    }
    Uri uri = bundle.getParcelable(Intent.EXTRA_STREAM);
    if (uri == null) {
        throw new WriterException("No EXTRA_STREAM");
    }
    byte[] vcard;
    String vcardString;
    InputStream stream = null;
    try {
        stream = activity.getContentResolver().openInputStream(uri);
        if (stream == null) {
            throw new WriterException("Can't open stream for " + uri);
        }
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[2048];
        int bytesRead;
        while ((bytesRead = stream.read(buffer)) > 0) {
            baos.write(buffer, 0, bytesRead);
        }
        vcard = baos.toByteArray();
        vcardString = new String(vcard, 0, vcard.length, "UTF-8");
    } catch (IOException ioe) {
        throw new WriterException(ioe);
    } finally {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException e) {
            // continue
            }
        }
    }
    Log.d(TAG, "Encoding share intent content:");
    Log.d(TAG, vcardString);
    Result result = new Result(vcardString, vcard, null, BarcodeFormat.QR_CODE);
    ParsedResult parsedResult = ResultParser.parseResult(result);
    if (!(parsedResult instanceof AddressBookParsedResult)) {
        throw new WriterException("Result was not an address");
    }
    encodeQRCodeContents((AddressBookParsedResult) parsedResult);
    if (contents == null || contents.isEmpty()) {
        throw new WriterException("No content to encode");
    }
}

Example 30 with WriterException

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

the class MyCodeActivity method generateQRCode.

private Bitmap generateQRCode(String content) {
    try {
        QRCodeWriter writer = new QRCodeWriter();
        // MultiFormatWriter writer = new MultiFormatWriter();
        BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, 500, 500);
        return bitMatrix2Bitmap(matrix);
    } catch (WriterException e) {
        e.printStackTrace();
    }
    return null;
}