[英]How to generate a custom QR code in Android programmatically using ZXing Library?
[英]How to generate 65 * 65 Qr code using zxing library file?
我可以使用zxing库文件(版本1.7.0)生成90 * 90 Qr Code。 但是当我给图像的尺寸小于90时,Qrcode数据填充区域变得太小,请看以下示例
尺寸保持为90 * 90时,
同时保持尺寸为89 * 89 ..
我想生成65 * 65 Qr代码,请帮助我。
String myCodeText = "Success";
String filePath = "D:/CrunchifyQR.png";
int size = 90;
String fileType = "png"
Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
QRCodeWriter qrCodeWriter = new QRCodeWriter();
ByteMatrix byteMatrix = qrCodeWriter.encode(myCodeText,BarcodeFormat.QR_CODE, size, size, hintMap);
int CrunchifyWidth = byteMatrix.getWidth() ;
BufferedImage image = new BufferedImage(CrunchifyWidth, CrunchifyWidth, BufferedImage.TYPE_INT_RGB);
image.createGraphics();
Graphics2D graphics = (Graphics2D) image.getGraphics();
graphics.setColor(Color.BLACK);
graphics.fillRect(0, 0, CrunchifyWidth, CrunchifyWidth);
graphics.setColor(Color.GRAY);
byte[][] byteArr = byteMatrix.getArray();
for (int i = 0; i < CrunchifyWidth; i++) {
for (int j = 0; j < CrunchifyWidth; j++) {
int grayValue = byteArr[i][j] & 0xff;
if (grayValue != 0) {
graphics.fillRect(i, j, 1, 1);
}
}
}
ImageIO.write(image, fileType, myFile);
尝试将MARGIN属性设置为1(默认情况下等于4),如下所示:
Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
hintMap.put(EncodeHintType.MARGIN, 1);
希望对您有所帮助!
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