如何生成带有徽标的二维码？ [英] How to generate QR code with logo inside it?

问题描述

我正在为Android设备开发应用程序。
我想在其中生成带有徽标的二维码。

I am developing the application for Android devices. I want to generate QR code with logo inside it.

使用 ZXing 我知道如何生成像这样的简单QR码：

With ZXing I know how to generate simple QR codes like this one:

但我想在其中生成带有徽标的二维码。
所以我希望得到这样的结果：

But I want to generate QR code with logo inside it. So I want to get something like this:

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

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.

谢谢！

推荐答案

您可以将您的徽标添加为图像叠加，例如

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;
}

请参阅 post & github 了解更多信息

Please refer this post & github for more info

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