qr code generator in java
public static BufferedImage generateQRCodeImage(String barcodeText) throws Exception {
QRCodeWriter barcodeWriter = new QRCodeWriter();
BitMatrix bitMatrix =
barcodeWriter.encode(barcodeText, BarcodeFormat.QR_CODE, 200, 200);
return MatrixToImageWriter.toBufferedImage(bitMatrix);
}read qr code from image java
// Imports
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.ChecksumException;
import com.google.zxing.FormatException;
import com.google.zxing.LuminanceSource;
import com.google.zxing.NotFoundException;
import com.google.zxing.RGBLuminanceSource;
import com.google.zxing.Reader;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeReader;
// Interesting method
public static String decodeQRImage(String path) {
Bitmap bMap = BitmapFactory.decodeFile(path);
String decoded = null;
int[] intArray = new int[bMap.getWidth() * bMap.getHeight()];
bMap.getPixels(intArray, 0, bMap.getWidth(), 0, 0, bMap.getWidth(),
bMap.getHeight());
LuminanceSource source = new RGBLuminanceSource(bMap.getWidth(),
bMap.getHeight(), intArray);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Reader reader = new QRCodeReader();
try {
Result result = reader.decode(bitmap);
decoded = result.getText();
} catch (NotFoundException e) {
e.printStackTrace();
} catch (ChecksumException e) {
e.printStackTrace();
} catch (FormatException e) {
e.printStackTrace();
}
return decoded;
}Copyright © 2021 Codeinu
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