Created
January 22, 2015 15:02
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生成二维码
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| //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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