下面列出了com.google.zxing.BarcodeFormat# EAN_13 ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
*
* @param barcode A bitmap of the captured image.
* @param scaleFactor amount by which thumbnail was scaled
* @param rawResult The decoded results which contains the points to draw.
*/
private void drawResultPoints(Bitmap barcode, float scaleFactor, Result rawResult) {
ResultPoint[] points = rawResult.getResultPoints();
if (points != null && points.length > 0) {
Canvas canvas = new Canvas(barcode);
Paint paint = new Paint();
paint.setColor(getResources().getColor(R.color.result_points));
if (points.length == 2) {
paint.setStrokeWidth(4.0f);
drawLine(canvas, paint, points[0], points[1], scaleFactor);
} else if (points.length == 4 &&
(rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A ||
rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
// Hacky special case -- draw two lines, for the barcode and metadata
drawLine(canvas, paint, points[0], points[1], scaleFactor);
drawLine(canvas, paint, points[2], points[3], scaleFactor);
} else {
paint.setStrokeWidth(10.0f);
for (ResultPoint point : points) {
if (point != null) {
canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint);
}
}
}
}
}
/**
* See <a href="http://www.bisg.org/isbn-13/for.dummies.html">ISBN-13 For
* Dummies</a>
*/
@Override
public ISBNParsedResult parse(Result result) {
BarcodeFormat format = result.getBarcodeFormat();
if (format != BarcodeFormat.EAN_13) {
return null;
}
String rawText = getMassagedText(result);
int length = rawText.length();
if (length != 13) {
return null;
}
if (!rawText.startsWith("978") && !rawText.startsWith("979")) {
return null;
}
return new ISBNParsedResult(rawText);
}
@Override
public ProductParsedResult parse(Result result) {
BarcodeFormat format = result.getBarcodeFormat();
if (!(format == BarcodeFormat.UPC_A || format == BarcodeFormat.UPC_E || format == BarcodeFormat.EAN_8
|| format == BarcodeFormat.EAN_13)) {
return null;
}
String rawText = getMassagedText(result);
if (!isStringOfDigits(rawText, rawText.length())) {
return null;
}
// Not actually checking the checksum again here
String normalizedProductID;
// Expand UPC-E for purposes of searching
if (format == BarcodeFormat.UPC_E && rawText.length() == 8) {
normalizedProductID = UPCEReader.convertUPCEtoUPCA(rawText);
} else {
normalizedProductID = rawText;
}
return new ProductParsedResult(rawText, normalizedProductID);
}
@Override
public ProductParsedResult parse(Result result) {
BarcodeFormat format = result.getBarcodeFormat();
if (!(format == BarcodeFormat.UPC_A || format == BarcodeFormat.UPC_E ||
format == BarcodeFormat.EAN_8 || format == BarcodeFormat.EAN_13)) {
return null;
}
String rawText = getMassagedText(result);
if (!isStringOfDigits(rawText, rawText.length())) {
return null;
}
// Not actually checking the checksum again here
String normalizedProductID;
// Expand UPC-E for purposes of searching
if (format == BarcodeFormat.UPC_E && rawText.length() == 8) {
normalizedProductID = UPCEReader.convertUPCEtoUPCA(rawText);
} else {
normalizedProductID = rawText;
}
return new ProductParsedResult(rawText, normalizedProductID);
}
@Override
public ProductParsedResult parse(Result result) {
BarcodeFormat format = result.getBarcodeFormat();
if (!(format == BarcodeFormat.UPC_A || format == BarcodeFormat.UPC_E ||
format == BarcodeFormat.EAN_8 || format == BarcodeFormat.EAN_13)) {
return null;
}
String rawText = getMassagedText(result);
if (!isStringOfDigits(rawText, rawText.length())) {
return null;
}
// Not actually checking the checksum again here
String normalizedProductID;
// Expand UPC-E for purposes of searching
if (format == BarcodeFormat.UPC_E && rawText.length() == 8) {
normalizedProductID = UPCEReader.convertUPCEtoUPCA(rawText);
} else {
normalizedProductID = rawText;
}
return new ProductParsedResult(rawText, normalizedProductID);
}
private static int symbolToFormat(BarcodeFormat symbol) {
if (BarcodeFormat.AZTEC == symbol) {
return 225;
} else if (BarcodeFormat.CODABAR == symbol) {
return 38;
} else if (BarcodeFormat.CODE_128 == symbol) {
return 128;
} else if (BarcodeFormat.CODE_39 == symbol) {
return 39;
} else if (BarcodeFormat.CODE_93 == symbol) {
return 93;
} else if (BarcodeFormat.DATA_MATRIX == symbol) {
return 200;
} else if (BarcodeFormat.EAN_13 == symbol) {
return 13;
} else if (BarcodeFormat.EAN_8 == symbol) {
return 8;
} else if (BarcodeFormat.ITF == symbol) {
return 25;
} else if (BarcodeFormat.MAXICODE == symbol) {
return 94;
} else if (BarcodeFormat.PDF_417 == symbol) {
return 57;
} else if (BarcodeFormat.QR_CODE == symbol) {
return 64;
} else if (BarcodeFormat.RSS_14 == symbol) {
return 34;
} else if (BarcodeFormat.RSS_EXPANDED == symbol) {
return 35;
} else if (BarcodeFormat.UPC_A == symbol) {
return 12;
} else if (BarcodeFormat.UPC_E == symbol) {
return 9;
} else if (BarcodeFormat.UPC_EAN_EXTENSION == symbol) {
return 15;
}
return -1;
}
private static BarcodeFormat formatToSymbol(int format) {
if (225 == format) {
return BarcodeFormat.AZTEC;
} else if (38 == format) {
return BarcodeFormat.CODABAR;
} else if (128 == format) {
return BarcodeFormat.CODE_128;
} else if (39 == format) {
return BarcodeFormat.CODE_39;
} else if (93 == format) {
return BarcodeFormat.CODE_93;
} else if (200 == format) {
return BarcodeFormat.DATA_MATRIX;
} else if (13 == format) {
return BarcodeFormat.EAN_13;
} else if (8 == format) {
return BarcodeFormat.EAN_8;
} else if (25 == format) {
return BarcodeFormat.ITF;
} else if (94 == format) {
return BarcodeFormat.MAXICODE;
} else if (57 == format) {
return BarcodeFormat.PDF_417;
} else if (64 == format) {
return BarcodeFormat.QR_CODE;
} else if (34 == format) {
return BarcodeFormat.RSS_14;
} else if (35 == format) {
return BarcodeFormat.RSS_EXPANDED;
} else if (12 == format) {
return BarcodeFormat.UPC_A;
} else if (9 == format) {
return BarcodeFormat.UPC_E;
} else if (15 == format) {
return BarcodeFormat.UPC_EAN_EXTENSION;
}
return null;
}
@Override
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height,
Map<EncodeHintType,?> hints) throws WriterException {
if (format != BarcodeFormat.EAN_13) {
throw new IllegalArgumentException("Can only encode EAN_13, but got " + format);
}
return super.encode(contents, format, width, height, hints);
}
/**
* @param color Color of result points
* @return {@link Bitmap} with result points on it, or plain bitmap, if no result points
*/
public Bitmap getBitmapWithResultPoints(int color) {
Bitmap bitmap = getBitmap();
Bitmap barcode = bitmap;
ResultPoint[] points = mResult.getResultPoints();
if (points != null && points.length > 0 && bitmap != null) {
barcode = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(barcode);
canvas.drawBitmap(bitmap, 0, 0, null);
Paint paint = new Paint();
paint.setColor(color);
if (points.length == 2) {
paint.setStrokeWidth(PREVIEW_LINE_WIDTH);
drawLine(canvas, paint, points[0], points[1], mScaleFactor);
} else if (points.length == 4 &&
(mResult.getBarcodeFormat() == BarcodeFormat.UPC_A ||
mResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
// Hacky special case -- draw two lines, for the barcode and metadata
drawLine(canvas, paint, points[0], points[1], mScaleFactor);
drawLine(canvas, paint, points[2], points[3], mScaleFactor);
} else {
paint.setStrokeWidth(PREVIEW_DOT_WIDTH);
for (ResultPoint point : points) {
if (point != null) {
canvas.drawPoint(point.getX() / mScaleFactor, point.getY() / mScaleFactor, paint);
}
}
}
}
return barcode;
}
/**
* Method is used to convert parsed String to BarcodeFormat to create an image of the qr code
* @param stringFormat as String
* @return format as BarcodeFormat
*/
public BarcodeFormat StringToBarcodeFormat(String stringFormat){
BarcodeFormat format;
switch(stringFormat){
case "CODBAR":
format = BarcodeFormat.CODABAR;
break;
case "CODE_128":
format= BarcodeFormat.CODE_128;
break;
case "CODE_39":
format = BarcodeFormat.CODE_39;
break;
case "EAN_13":
format = BarcodeFormat.EAN_13;
break;
case "EAN_8":
format = BarcodeFormat.EAN_8;
break;
case "ITF":
format = BarcodeFormat.ITF;
break;
case "PDF_417":
format = BarcodeFormat.PDF_417;
break;
case "UPC_A":
format = BarcodeFormat.UPC_A;
break;
case "QR_CODE":
format = BarcodeFormat.QR_CODE;
break;
case "AZTEC":
format = BarcodeFormat.AZTEC;
break;
default:
format = BarcodeFormat.CODABAR;
break;
}
return format;
}
@Override
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height,
Map<EncodeHintType,?> hints) throws WriterException {
if (format != BarcodeFormat.EAN_13) {
throw new IllegalArgumentException("Can only encode EAN_13, but got " + format);
}
return super.encode(contents, format, width, height, hints);
}
@Override
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height,
Map<EncodeHintType,?> hints) throws WriterException {
if (format != BarcodeFormat.EAN_13) {
throw new IllegalArgumentException("Can only encode EAN_13, but got " + format);
}
return super.encode(contents, format, width, height, hints);
}
@Override
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height,
Map<EncodeHintType,?> hints) throws WriterException {
if (format != BarcodeFormat.EAN_13) {
throw new IllegalArgumentException("Can only encode EAN_13, but got " + format);
}
return super.encode(contents, format, width, height, hints);
}
@Override
public Result decodeRow(int rowNumber,
BitArray row,
Map<DecodeHintType,?> hints) throws NotFoundException {
// Compute this location once and reuse it on multiple implementations
int[] startGuardPattern = UPCEANReader.findStartGuardPattern(row);
for (UPCEANReader reader : readers) {
Result result;
try {
result = reader.decodeRow(rowNumber, row, startGuardPattern, hints);
} catch (ReaderException re) {
continue;
}
// Special case: a 12-digit code encoded in UPC-A is identical to a "0"
// followed by those 12 digits encoded as EAN-13. Each will recognize such a code,
// UPC-A as a 12-digit string and EAN-13 as a 13-digit string starting with "0".
// Individually these are correct and their readers will both read such a code
// and correctly call it EAN-13, or UPC-A, respectively.
//
// In this case, if we've been looking for both types, we'd like to call it
// a UPC-A code. But for efficiency we only run the EAN-13 decoder to also read
// UPC-A. So we special case it here, and convert an EAN-13 result to a UPC-A
// result if appropriate.
//
// But, don't return UPC-A if UPC-A was not a requested format!
boolean ean13MayBeUPCA =
result.getBarcodeFormat() == BarcodeFormat.EAN_13 &&
result.getText().charAt(0) == '0';
Collection<BarcodeFormat> possibleFormats =
hints == null ? null : (Collection<BarcodeFormat>) hints.get(DecodeHintType.POSSIBLE_FORMATS);
boolean canReturnUPCA = possibleFormats == null || possibleFormats.contains(BarcodeFormat.UPC_A);
if (ean13MayBeUPCA && canReturnUPCA) {
// Transfer the metdata across
Result resultUPCA = new Result(result.getText().substring(1),
result.getRawBytes(),
result.getResultPoints(),
BarcodeFormat.UPC_A);
resultUPCA.putAllMetadata(result.getResultMetadata());
return resultUPCA;
}
return result;
}
throw NotFoundException.getNotFoundInstance();
}
@Override
BarcodeFormat getBarcodeFormat() {
return BarcodeFormat.EAN_13;
}
@Override
public Result decodeRow(int rowNumber, BitArray row, Map<DecodeHintType, ?> hints) throws NotFoundException {
// Compute this location once and reuse it on multiple implementations
int[] startGuardPattern = UPCEANReader.findStartGuardPattern(row);
for (UPCEANReader reader : readers) {
Result result;
try {
result = reader.decodeRow(rowNumber, row, startGuardPattern, hints);
} catch (ReaderException ignored) {
continue;
}
// Special case: a 12-digit code encoded in UPC-A is identical to a
// "0"
// followed by those 12 digits encoded as EAN-13. Each will
// recognize such a code,
// UPC-A as a 12-digit string and EAN-13 as a 13-digit string
// starting with "0".
// Individually these are correct and their readers will both read
// such a code
// and correctly call it EAN-13, or UPC-A, respectively.
//
// In this case, if we've been looking for both types, we'd like to
// call it
// a UPC-A code. But for efficiency we only run the EAN-13 decoder
// to also read
// UPC-A. So we special case it here, and convert an EAN-13 result
// to a UPC-A
// result if appropriate.
//
// But, don't return UPC-A if UPC-A was not a requested format!
boolean ean13MayBeUPCA = result.getBarcodeFormat() == BarcodeFormat.EAN_13
&& result.getText().charAt(0) == '0';
@SuppressWarnings("unchecked")
Collection<BarcodeFormat> possibleFormats = hints == null ? null
: (Collection<BarcodeFormat>) hints.get(DecodeHintType.POSSIBLE_FORMATS);
boolean canReturnUPCA = possibleFormats == null || possibleFormats.contains(BarcodeFormat.UPC_A);
if (ean13MayBeUPCA && canReturnUPCA) {
// Transfer the metdata across
Result resultUPCA = new Result(result.getText().substring(1), result.getRawBytes(),
result.getResultPoints(), BarcodeFormat.UPC_A);
resultUPCA.putAllMetadata(result.getResultMetadata());
return resultUPCA;
}
return result;
}
throw NotFoundException.getNotFoundInstance();
}
@Override
BarcodeFormat getBarcodeFormat() {
return BarcodeFormat.EAN_13;
}
/**
* Parse barcodes as BarcodeFormat constants.
*
* Supports all iOS codes except [code39mod43, itf14]
*
* Additionally supports [codabar, maxicode, rss14, rssexpanded, upca, upceanextension]
*/
private BarcodeFormat parseBarCodeString(String c) {
if ("aztec".equals(c)) {
return BarcodeFormat.AZTEC;
} else if ("ean13".equals(c)) {
return BarcodeFormat.EAN_13;
} else if ("ean8".equals(c)) {
return BarcodeFormat.EAN_8;
} else if ("qr".equals(c)) {
return BarcodeFormat.QR_CODE;
} else if ("pdf417".equals(c)) {
return BarcodeFormat.PDF_417;
} else if ("upce".equals(c)) {
return BarcodeFormat.UPC_E;
} else if ("datamatrix".equals(c)) {
return BarcodeFormat.DATA_MATRIX;
} else if ("code39".equals(c)) {
return BarcodeFormat.CODE_39;
} else if ("code93".equals(c)) {
return BarcodeFormat.CODE_93;
} else if ("interleaved2of5".equals(c)) {
return BarcodeFormat.ITF;
} else if ("codabar".equals(c)) {
return BarcodeFormat.CODABAR;
} else if ("code128".equals(c)) {
return BarcodeFormat.CODE_128;
} else if ("maxicode".equals(c)) {
return BarcodeFormat.MAXICODE;
} else if ("rss14".equals(c)) {
return BarcodeFormat.RSS_14;
} else if ("rssexpanded".equals(c)) {
return BarcodeFormat.RSS_EXPANDED;
} else if ("upca".equals(c)) {
return BarcodeFormat.UPC_A;
} else if ("upceanextension".equals(c)) {
return BarcodeFormat.UPC_EAN_EXTENSION;
} else {
android.util.Log.v("RCTCamera", "Unsupported code.. [" + c + "]");
return null;
}
}
@Override
public Result decodeRow(int rowNumber,
BitArray row,
Map<DecodeHintType,?> hints) throws NotFoundException {
// Compute this location once and reuse it on multiple implementations
int[] startGuardPattern = UPCEANReader.findStartGuardPattern(row);
for (UPCEANReader reader : readers) {
Result result;
try {
result = reader.decodeRow(rowNumber, row, startGuardPattern, hints);
} catch (ReaderException ignored) {
continue;
}
// Special case: a 12-digit code encoded in UPC-A is identical to a "0"
// followed by those 12 digits encoded as EAN-13. Each will recognize such a code,
// UPC-A as a 12-digit string and EAN-13 as a 13-digit string starting with "0".
// Individually these are correct and their readers will both read such a code
// and correctly call it EAN-13, or UPC-A, respectively.
//
// In this case, if we've been looking for both types, we'd like to call it
// a UPC-A code. But for efficiency we only run the EAN-13 decoder to also read
// UPC-A. So we special case it here, and convert an EAN-13 result to a UPC-A
// result if appropriate.
//
// But, don't return UPC-A if UPC-A was not a requested format!
boolean ean13MayBeUPCA =
result.getBarcodeFormat() == BarcodeFormat.EAN_13 &&
result.getText().charAt(0) == '0';
@SuppressWarnings("unchecked")
Collection<BarcodeFormat> possibleFormats =
hints == null ? null : (Collection<BarcodeFormat>) hints.get(DecodeHintType.POSSIBLE_FORMATS);
boolean canReturnUPCA = possibleFormats == null || possibleFormats.contains(BarcodeFormat.UPC_A);
if (ean13MayBeUPCA && canReturnUPCA) {
// Transfer the metdata across
Result resultUPCA = new Result(result.getText().substring(1),
result.getRawBytes(),
result.getResultPoints(),
BarcodeFormat.UPC_A);
resultUPCA.putAllMetadata(result.getResultMetadata());
return resultUPCA;
}
return result;
}
throw NotFoundException.getNotFoundInstance();
}
@Override
BarcodeFormat getBarcodeFormat() {
return BarcodeFormat.EAN_13;
}