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@easternHong
Created January 22, 2015 15:02
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生成二维码
//Edited by mythou
//http://www.cnblogs.com/mythou/
  //要转换的地址或字符串,可以是中文
public void createQRImage(String url)
{
try
{
//判断URL合法性
if (url == null || "".equals(url) || url.length() < 1)
{
return;
}
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
//图像数据转换,使用了矩阵转换
BitMatrix bitMatrix = new QRCodeWriter().encode(url, BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
//下面这里按照二维码的算法,逐个生成二维码的图片,
//两个for循环是图片横列扫描的结果
for (int y = 0; y < QR_HEIGHT; y++)
{
for (int x = 0; x < QR_WIDTH; x++)
{
if (bitMatrix.get(x, y))
{
pixels[y * QR_WIDTH + x] = 0xff000000;
}
else
{
pixels[y * QR_WIDTH + x] = 0xffffffff;
}
}
}
//生成二维码图片的格式,使用ARGB_8888
Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
//显示到一个ImageView上面
sweepIV.setImageBitmap(bitmap);
}
catch (WriterException e)
{
e.printStackTrace();
}
}
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