根据字符串生成指定二维码

来源：互联网发布：犀牛软件反应迟钝编辑：程序博客网时间：2024/04/30 12:00

//二维码生成类
public class QRGen {
//链接地址
public static String Uri;
//二维码图片
public static Bitmap qrCodeBitmap;
//根据字符串生成二维码图片并显示在界面上，第二个参数为图片的大小
public static Bitmap creatQRGen(String str, int l){
QRGen.Uri = str;
if(!Uri.equals("")){
try {
qrCodeBitmap = EncodingHandler.createQRCode(Uri, l);
} catch (WriterException e) {
e.printStackTrace();
}
return qrCodeBitmap;
}else {
return null;
}
}

}

EncodingHandler.java

public final class EncodingHandler {
private static final int BLACK = 0xff000000;
public static Bitmap createQRCode(String str,int widthAndHeight) throws WriterException {
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix matrix = new MultiFormatWriter().encode(str,
BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight);
int width = matrix.getWidth();
int height = matrix.getHeight();
int[] pixels = new int[width * height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (matrix.get(x, y)) {
pixels[y * width + x] = BLACK;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
}

还需要引用zxing.jar

http://download.csdn.net/detail/u014157740/8931807

效果图：

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