public static Bitmap Create2DCode(String str) throws WriterException {
// 生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
Hashtable<EncodeHintType,String> hints = new Hashtable<EncodeHintType,String>();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix matrix = new MultiFormatWriter().encode(str,BarcodeFormat.QR_CODE, 300, 300,hints);
int width = matrix.getWidth();
int height = matrix.getHeight();
// 二维矩阵转为一维像素数组,也就是一直横着排了
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] = 0xff000000;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
// 通过像素数组生成bitmap,具体参考api
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}