zxing生成二维码

zxing生成二维码

public class QrCodeUtil {
public static Bitmap creaQrCode(String content, int qrWidth, int qrHeight) {
return createQrCode(content, "utf-8", Color.BLACK, qrWidth, qrHeight, ErrorCorrectionLevel.H, null);
}

public static Bitmap createQrCode(String content, String characterSet, int qrColor, int qrWidth, int qrHeight
, ErrorCorrectionLevel ecl, Bitmap logo) {
if (content == null) {
return null;
}
if (characterSet == null) {
characterSet = "utf-8";
}
if (ecl == null) {
ecl = ErrorCorrectionLevel.H;
}
Map<EncodeHintType, Object> hints = new HashMap<>();
hints.put(EncodeHintType.CHARACTER_SET, characterSet);
hints.put(EncodeHintType.ERROR_CORRECTION, ecl);
hints.put(EncodeHintType.MARGIN, 0);
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, qrWidth, qrHeight, hints);
int[] piexs = new int[qrWidth * qrHeight];
for (int y = 0; y < qrHeight; y++) {
for (int x = 0; x < qrWidth; x++) {
if (bitMatrix.get(x, y)) {
piexs[y * qrWidth + x] = qrColor;
} else {
piexs[y * qrWidth] = 0xffffffff;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(qrWidth, qrHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(piexs, 0, qrWidth, 0, 0, qrWidth, qrHeight, true, null);
if (logo != null) {
int logoHeight = qrHeight / 5;
int logoWidth = qrWidth / 5;
canvas.drawBitmap(genThumbnails(logo, logoWidth, logoHeight), (qrWidth - logoWidth) / 2.0f, (qrHeight - logoHeight) / 2.0f, null);
}
return bitmap;
} catch (WriterException e) {

4000
e.printStackTrace();
}
return null;
}

private static Bitmap genThumbnails(Bitmap logo, int logoWidth, int logoHeight) {
if (logo == null || logoHeight < 0 || logoWidth < 0) {
throw new IllegalArgumentException();
}
Bitmap bitmap = Bitmap.createBitmap(logoWidth, logoHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
canvas.drawBitmap(Bitmap.createScaledBitmap(logo, logoWidth - 10, logoHeight - 10, false), 5, 5, null);
return bitmap;
}
}