qr code generator

//Code
private fun generateQRCode(text: String): Bitmap {
    val width = 500
    val height = 500
    val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
    val codeWriter = MultiFormatWriter()
    try {
        val bitMatrix = codeWriter.encode(text, BarcodeFormat.QR_CODE, width, height)
        for (x in 0 until width) {
            for (y in 0 until height) {
                bitmap.setPixel(x, y, if (bitMatrix[x, y]) Color.BLACK else Color.WHITE)
            }
        }
    } catch (e: WriterException) {
        Log.d(TAG, "generateQRCode: ${e.message}")
    }
    return bitmap
}

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Raindev 115 points

                                    #include &quot;QrCode.hpp&quot;

void paintQR(QPainter &amp;painter, const QSize sz, const QString &amp;data, QColor fg)
{

    qrcodegen::QrCode qr = qrcodegen::QrCode::encodeText(data.toUtf8().constData(), qrcodegen::QrCode::Ecc::LOW);
    const int s=qr.getSize()&gt;0?qr.getSize():1;
    const double w=sz.width();
    const double h=sz.height();
    const double aspect=w/h;
    const double size=((aspect&gt;1.0)?h:w);
    const double scale=size/(s+2);
   
    painter.setPen(Qt::NoPen);
    painter.setBrush(fg);
    for(int y=0; y&lt;s; y++) {
        for(int x=0; x&lt;s; x++) {
            const int color=qr.getModule(x, y);  // 0 for white, 1 for black
            if(0!=color) {
                const double rx1=(x+1)*scale, ry1=(y+1)*scale;
                QRectF r(rx1, ry1, scale, scale);
                painter.drawRects(&amp;r,1);
            }
        }
    }
}

Thank you! 5

4 (5 Votes)

3.83

Israel sh 95 points

                                    QRCOde generator

Thank you! 6

3.83 (6 Votes)

4.33

James Nielson 80 points

                                    $ npm install qrcode-terminal

Thank you! 6

4.33 (6 Votes)

Yi Yang 110 points

                                    &lt;!DOCTYPE html&gt;
&lt;html lang=&quot;en&quot;&gt;
&lt;head&gt;
&lt;title&gt;QR-Code Generator&lt;/title&gt;
&lt;style&gt;
	* {
      margin: 0px; 
      padding: 0px;
      font-family: monospace, Arial, sans-serif;
  	}
	h1 {
      text-align: center; 
      text-shadow: 2px 2px 0px rgba(255,255,255,.7), 5px 7px 0px rgba(0, 0, 0, 0.1);  font-size:50px; margin-top:40px; color:#fff; 
  	}
    input[type=text] {
        width: 90%;
        padding: 12px 20px;
        margin: 8px 26px;
        display: inline-block;
        border: 1px solid #ccc;
        box-sizing: border-box;
        font-size:16px;
    }
    button {
        background-color: #4CAF50;
        color: white;
        padding: 14px 20px;
        margin: 8px 26px;
        border: none;
        cursor: pointer;
        width: 90%;
        font-size:20px;
    }
    button:hover {
        opacity: 0.8;
    }
&lt;/style&gt;
&lt;!--Jquery 3.2.1--&gt;
&lt;script src=&quot;https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js&quot;&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body background=&quot;../background1.png&quot;&gt;
&lt;h1&gt;QR-Code Generator&lt;/h1&gt;
&lt;div id=&quot;form-wrapper&quot; style=&quot;width:46%; float:left; border:5px solid rgba(255,255,255,0.6); margin-top:20px; padding:10px&quot;&gt;
    &lt;form id=&quot;generator&quot;&gt;     
        &lt;label for=&quot;codeSize&quot; style=&quot;font-size:20px; margin-right:20px; color:#fff;&quot;&gt;Select QR Size:&lt;/label&gt;
        &lt;select id=&quot;codeSize&quot; name=&quot;codeSize&quot; style=&quot;width:260px; height:40px; &quot;&gt;
            &lt;option value=&quot;75&quot;&gt;Mini&lt;/option&gt;
            &lt;option value=&quot;155&quot;&gt;Small&lt;/option&gt;
            &lt;option value=&quot;186&quot;&gt;Medium&lt;/option&gt;
            &lt;option value=&quot;248&quot; selected=&quot;selected&quot;&gt;Large&lt;/option&gt;
            &lt;option value=&quot;300&quot;&gt;XL&lt;/option&gt;
            &lt;option value=&quot;450&quot;&gt;XXL&lt;/option&gt;
        &lt;/select&gt;
        &lt;input type=&quot;text&quot; onclick=&quot;myFunction()&quot; id=&quot;codeData&quot; name=&quot;codeData&quot; size=&quot;50&quot; placeholder=&quot;Enter a url or text&quot; style=&quot;margin-top:20px&quot; autocomplete=&quot;off&quot;/ &gt;
        &lt;br&gt;
        &lt;button id=&quot;generate&quot;&gt;generate&lt;/button&gt;
    &lt;/form&gt;
    &lt;div id=&quot;alert&quot; style=&quot;height:20px; text-align:center; margin:10px auto&quot;&gt;&lt;/div&gt;
&lt;/div&gt;

  &lt;div style=&quot;float:right;&quot;&gt;
   &lt;div id=&quot;image&quot; style=&quot;margin:auto&quot;&gt;Image will show here&lt;/div&gt;
   &lt;div id=&quot;link&quot; style=&quot;margin-top:10px; text-align:center&quot;&gt;&lt;/div&gt;
  &lt;/div&gt;
  
  &lt;div id=&quot;code&quot; style=&quot;float:left; width:100%; height:20px; text-align:center; margin-top:10px&quot;&gt;&lt;/div&gt;
&lt;script&gt;
function myFunction() {
     document.getElementById(&quot;alert&quot;).innerHTML = &quot;&quot;;
	}
$(&quot;#generate&quot;).on(&quot;click&quot;, function () {
var data = $(&quot;#codeData&quot;).val();
var size = $(&quot;#codeSize&quot;).val();
if(data == &quot;&quot;) {
    $(&quot;#alert&quot;).append(&quot;&lt;p style='color:#fff;font-size:20px'&gt;Please Enter A Url Or Text&lt;/p&gt;&quot;); // If Input Is Blank
    return false;
} else {
    if( $(&quot;#image&quot;).is(':empty')) {
		
	  //QR Code Image
      $(&quot;#image&quot;).append(&quot;&lt;img src='http://chart.apis.google.com/chart?cht=qr&amp;chl=&quot; + data + &quot;&amp;chs=&quot; + size + &quot;' alt='qr' /&gt;&quot;);
	  
	  //This Provide An Image Download Link
      $(&quot;#link&quot;).append(&quot;&lt;a style='color:#fff;' href='http://chart.apis.google.com/chart?cht=qr&amp;chl=&quot; + data + &quot;&amp;chs=&quot; + size + &quot;'&gt;Download QR Code&lt;/a&gt;&quot;);
	  
	  //This Provide the Image Link Path In Text
      $(&quot;#code&quot;).append(&quot;&lt;p style='color:#fff;'&gt;&lt;strong&gt;Image Link:&lt;/strong&gt; http://chart.apis.google.com/chart?cht=qr&amp;chl=&quot; + data + &quot;&amp;chs=&quot; + size + &quot;&lt;/p&gt;&quot;);
      return false;
} else {
      $(&quot;#image&quot;).html(&quot;&quot;);
      $(&quot;#link&quot;).html(&quot;&quot;);
      $(&quot;#code&quot;).html(&quot;&quot;);
	  
      //QR Code Image
      $(&quot;#image&quot;).append(&quot;&lt;img src='http://chart.apis.google.com/chart?cht=qr&amp;chl=&quot; + data + &quot;&amp;chs=&quot; + size + &quot;' alt='qr' /&gt;&quot;);
	  
	  //This Provide An Image Download Link
      $(&quot;#link&quot;).append(&quot;&lt;a style='color:#fff;' href='http://chart.apis.google.com/chart?cht=qr&amp;chl=&quot; + data + &quot;&amp;chs=&quot; + size + &quot;'&gt;Download QR Code&lt;/a&gt;&quot;);
	  
	  //This Provide the Image Link Path In Text
      $(&quot;#code&quot;).append(&quot;&lt;p style='color:#fff;'&gt;&lt;strong&gt;Image Link:&lt;/strong&gt; http://chart.apis.google.com/chart?cht=qr&amp;chl=&quot; + data + &quot;&amp;chs=&quot; + size + &quot;&lt;/p&gt;&quot;);
      return false;
    }
  }
});
&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;

Thank you! 3

4 (3 Votes)

Nigel Holt 130 points

                                    QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(textBoxQRCode.Text, QRCodeGenerator.ECCLevel.Q);
pictureBoxQRCode.BackgroundImage = qrCode.GetGraphic(20);

Thank you! 2

4 (2 Votes)

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