I am developing the application for Android devices. I want to generate QR code with logo inside it.
With ZXing
I know how to generate simple QR codes like this one:
But I want to generate QR code with logo inside it. So I want to get something like this:
Is there any way to do it? I have no idea how to do it. Could you help me please? May there is some ready library or example of how to do it.
Thank you!
You can add your logo it as an Image Overlay like
public BufferedImage getQRCodeWithOverlay(BufferedImage qrcode)
{
BufferedImage scaledOverlay = scaleOverlay(qrcode);
Integer deltaHeight = qrcode.getHeight() - scaledOverlay.getHeight();
Integer deltaWidth = qrcode.getWidth() - scaledOverlay.getWidth();
BufferedImage combined = new BufferedImage(qrcode.getWidth(), qrcode.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D)combined.getGraphics();
g2.drawImage(qrcode, 0, 0, null);
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, overlayTransparency));
g2.drawImage(scaledOverlay, Math.round(deltaWidth/2), Math.round(deltaHeight/2), null);
return combined;
}
private BufferedImage scaleOverlay(BufferedImage qrcode)
{
Integer scaledWidth = Math.round(qrcode.getWidth() * overlayToQRCodeRatio);
Integer scaledHeight = Math.round(qrcode.getHeight() * overlayToQRCodeRatio);
BufferedImage imageBuff = new BufferedImage(scaledWidth, scaledHeight, BufferedImage.TYPE_INT_ARGB);
Graphics g = imageBuff.createGraphics();
g.drawImage(overlay.getScaledInstance(scaledWidth, scaledHeight, BufferedImage.SCALE_SMOOTH), 0, 0, new Color(0,0,0), null);
g.dispose();
return imageBuff;
}