如何生成带有徽标的二维码？

Question

我正在开发Android设备的应用程序.我想在其中生成带有徽标的QR码.

随着ZXing我知道如何产生这样一个简单的QR码:

但我想在其中生成带有徽标的QR码.所以我希望得到这样的东西:

有什么办法吗？我不知道该怎么做.请问你能帮帮我吗？可能有一些现成的库或如何做的例子.

谢谢!

Answer 1

您可以将徽标添加为图像叠加层，例如

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;
}

请参考这篇文章和github以获取更多信息