普通二维码和自定义二维码的生成

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1，本次使用的是ZXing二维码。

1、//生成普通二维码
Bitmap bitmap = generateBitmap("http://blog.csdn.net/yanzhenjie1003/article/details/52503533", 400, 400);
iv.setImageBitmap(bitmap);

2、 //生成自定义的二维码
//先生成二维码
Bitmap bitmap = generateBitmap("http://blog.csdn.net/yanzhenjie1003/article/details/52503533", 400, 400);
//添加logo
//先得到一个logo图标
Bitmap logoBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.a);
//把logo添加到二维码上
Bitmap customBitmap = addLogo(bitmap, logoBitmap);
iv.setImageBitmap(customBitmap);

//生成二维码
private Bitmap generateBitmap(String content, int width, int height) {
QRCodeWriter qrCodeWriter = new QRCodeWriter();
Map<EncodeHintType, String> hints = new HashMap<>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
try {
BitMatrix encode = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, width, height);
int[] pixels = new int[width * height];
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
if (encode.get(j, i)) {
pixels[i * width + j] = 0x00000000;
} else {
pixels[i * width + j] = 0xffffffff;
}
}
}
return Bitmap.createBitmap(pixels, 0, width, width, height, Bitmap.Config.RGB_565);
} catch (WriterException e) {
e.printStackTrace();
}
return null;
}

/**
* 添加图标
*
* @param qrBitmap
* @param logoBitmap
* @return
*/
private Bitmap addLogo(Bitmap qrBitmap, Bitmap logoBitmap) {
int qrBitmapWidth = qrBitmap.getWidth();
int qrBitmapHeight = qrBitmap.getHeight();
int logoBitmapWidth = logoBitmap.getWidth();
int logoBitmapHeight = logoBitmap.getHeight();
Bitmap blankBitmap = Bitmap.createBitmap(qrBitmapWidth, qrBitmapHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(blankBitmap);
canvas.drawBitmap(qrBitmap, 0, 0, null);
canvas.save(Canvas.ALL_SAVE_FLAG);
float scaleSize = 1.0f;
while ((logoBitmapWidth / scaleSize) > (qrBitmapWidth / 5) || (logoBitmapHeight / scaleSize) > (qrBitmapHeight / 5)) {
scaleSize *= 2;
}
float sx = 1.0f / scaleSize;
canvas.scale(sx, sx, qrBitmapWidth / 2, qrBitmapHeight / 2);
canvas.drawBitmap(logoBitmap, (qrBitmapWidth - logoBitmapWidth) / 2, (qrBitmapHeight - logoBitmapHeight) / 2, null);
canvas.restore();
return blankBitmap;
}

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