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生成QR图 <br>private
void createImage() { try
{ // 需要引入core包 QRCodeWriter writer = new
QRCodeWriter(); String text = qr_text.getText().toString(); Log.i(TAG, "生成的文本："
+ text); if
(text == null
|| "".equals(text) || text.length() < 1) { return; } // 把输入的文本转为二维码 BitMatrix martix = writer.encode(text, BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT); System.out.println("w:"
+ martix.getWidth() + "h:" + martix.getHeight()); Hashtable<EncodeHintType, String> hints = new
Hashtable<EncodeHintType, String>(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); BitMatrix bitMatrix = new
QRCodeWriter().encode(text, BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints); int[] pixels = new
int[QR_WIDTH * QR_HEIGHT]; 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; } } } Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT, Bitmap.Config.ARGB_8888); bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT); qr_image.setImageBitmap(bitmap); } catch
(WriterException e) { e.printStackTrace(); } } |
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解析QR图片private
void scanningImage() { Map<DecodeHintType, String> hints = new
HashMap<DecodeHintType, String>(); hints.put(DecodeHintType.CHARACTER_SET, "utf-8"); // 获得待解析的图片 Bitmap bitmap = ((BitmapDrawable) qr_image.getDrawable()).getBitmap(); RGBLuminanceSource source = new
RGBLuminanceSource(bitmap); BinaryBitmap bitmap1 = new
BinaryBitmap(new
HybridBinarizer(source)); QRCodeReader reader = new
QRCodeReader(); Result result; try
{ result = reader.decode(bitmap1, hints); // 得到解析后的文字 qr_result.setText(result.getText()); } catch
(NotFoundException e) { e.printStackTrace(); } catch
(ChecksumException e) { e.printStackTrace(); } catch
(FormatException e) { e.printStackTrace(); }} |
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/** * 用字符串生成二维码 * @param str * @author zhouzhe@lenovo-cw.com * zxing是google的一个开源二维码项目,目前基本上和二维码打交道的东西,都会用到它. 最近项 * 目中用到了android手机需要根据提供的字符串生成二维码图片,之前用zxing做过二维码解码, * 编码还没做过,看了一些demo都是用到了zxing的j2se包的内容,这个在android或者其他平台 * 上显然无法实现,所以我们要利用zxing生成二维矩阵,然后根据android平台的提供的api来 * 生成图片. * 这一切,需要zxing的core包,在zxing 1.6下测试通过. * @return * @throws WriterException */ public
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 BitMatrix matrix = new
MultiFormatWriter().encode(str,BarcodeFormat.QR_CODE, 300, 300); 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; } |
原文：http://www.cnblogs.com/xiaosw/p/3584232.html