zxing barcode

If a simple and comprehensive Android project can be analyzed, zxing is a good example.The source code of zxing can be downloaded from Google Code. The entire source code is checked out, which contains the source code of each platform, iOS and Android. Of course, we need Android code. Import the android project to eclipse. After the import is complete, eclipse will display various errors, which are caused b

Android-ZXing QR code scanning problems, androidzxing In recent work, we need to develop software with the QR code scanning function (based on the ZXing open-source project). Record the problems and hope to help you. 1. First, because scanning requires camera activation, you must add permissions. Otherwise, nothing can be done later. 2. Set the scan box size: Search for the com.

Using zxing to realize the embedded image of two-dimensional code generator has certain reference value, as follows: The basic idea is to use the zxing generated two-dimensional code picture, and then read the picture, insert the icon in it, and then the entire output picture. Recent projects need to generate two-dimensional code, looking for a few examples of synthesis, to make the final effect, two-dime

->base64Bytearrayoutputstream outputstream = new Bytearrayoutputstream ();Imageio.write (bimg, "JPG", outputstream);Base64encoder encoder = new Base64encoder ();String base64img = Encoder.encode (Outputstream.tobytearray ()); OutputThis.content = This.content.replace ("@{" + Key + "}","} public void Putimage (String key, image image, int width, int height)Throws IOException {Image->bufferreimageBufferedImage bimg = new BufferedImage (Image.getwidth (NULL),Image.getheight (NULL), BUFFEREDIMAGE.TY

The example of this article for us to analyze the zxing generation of two-dimensional code of the classic case for your reference, the specific contents are as follows 1, first of all, compile compile ' com.google.zxing:core:3.2.1 ' 2. actual combat public class QRCode {private static int image_halfwidth = 50;//width value, affect middle picture size/** * Generate two-dimensional code, the default size is 500*500 * * @return bit Map */public s

Viewfinderview customizes the view and implements a simple scanning interface. This article record my understanding of Android camera in the code process. Since I started to write a technical blog, there are many shortcomings in the first two articles. I wrote them as needed. It is estimated that it is difficult for everyone to have a clear understanding of what I wrote. This article tries to change the style and try to express my understanding, so that everyone can understand it. Before reading

. alertDialog; import android. content. intent; import android. OS. bundle; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. widget. textView; import com. google. zxing. ui. captureActivity; public class TwoCodeActivity extends Activity {public static final int SCAN_CODE = 1; AlertDialog. builder alertDialog = null;/** Called when the activity is first created. * // @ Override pub

public static Bitmap Create2dcode (String str) throws Writerexception {Generate a two-dimensional matrix, specify the size of the encoding, do not generate a picture and then zoom, which will blur leading to recognition failurehashtablehints.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 ();The two-dimensional matrix is converted into a one-dim

, System.Drawing.Imaging.ImageFormat format, string file ) {System.Drawing.Imaging.EncoderParameters EPS = new System.Drawing.Imaging.EncoderParameters (); Eps. Param[0] = new System.Drawing.Imaging.EncoderParameter (System.Drawing.Imaging.Encoder.Quality, 100L); Bitmap bmap = Tobitmap (matrix); Bmap. Save (file, format); } public static Bitmap Tobitmap (Bytematrix matrix) {int width = matrix. Width; int height = matrix. Height;

"), BarcodeFormat.QR_CODE, 800, 800); //将文字转换成二维矩阵，并设置矩阵大小，这里的矩阵大小就是后面生成的图片像素大小 File file = new File(path);//新建矩阵文件 MatrixToImageWriter.writeToFile(byteMatrix, "gif", file);//将矩阵文件转换成图片文件 } catch (Exception e) { e.printStackTrace(); } } /* * 解码： * 1 将图片反解码为二维矩阵 * 2 将该二维矩阵解码为内容 * */ public void decode(String imgPath) { try { Reader reader = new MultiFormatReader(); // String imgPath = "D:/Qr_pics/test7.png";//获取即将被解码图片的路径 File file = new File(imgPath);//获取该图片文件 BufferedImage image; t

Qrcodegenerator {public static byte[] Build (String content) throws IOException, writerexception { int width = 300; int height = +; //??????????? String format = "gif"; Hashtable hints = new Hashtable (); //???????? Ñ??? Hints.put (Encodehinttype.character_set, "Utf-8"); Bitmatrix Bitmatrix = new Multiformatwriter (). Encode (content, barcodeformat.qr_code, width, height, hints); Return Matrixtoimagewriter.wri

/*New private static final int my_permissions_request_call_camera = 1;//request code, self-defined//new Android6.0 permission check @Override protected void OnStart () {Super.onstart (); if (Build.VERSION.SDK_INT >= build.version_codes. M) {if (Contextcompat.checkselfpermission (this, Manifest.permission.CAMERA)! = Packagemanager.permission_grant ED) {//If there is no authorization, request authorization Activitycompat.requestpermissions (this, new String[]{manifest.permissi On.

analyzecallback = new Codeutils.analyzecallback () {@Override public void onanalyzesuccess (Bitmap mbitmap, String result) {Intent resultintent = New Intent (); Bundle bundle = new bundle (); Bundle.putint (Codeutils.result_type, codeutils.result_success); Bundle.putstring (codeutils.result_string, RESULT); Resultintent.putextras (bundle); Camera.this.setResult (RESULT_OK, resultintent); Camera.this.finish (); }

=bitmap.getheight (); int[] pixels =New int[Width *height]; Bitmap.getpixels (Pixels,0, Width, 0, 0, width, height); String Decoded=NewQrcodereader (). Decode (NewBinarybitmap (NewHybridbinarizer (Newrgbluminancesource (width, height, pixels))). GetText (); Decodedtextview.settext (decoded); } Catch(Exception ex) {LOG.E (tag,"Ex:" +ex); } } }); Try{bitmap= Bitmapfactory.decodestream (Getassets (). Open ("Qrcode_qq.png")); Qrcodet

); Hints.put (Encodehinttype.margin,2); Try{Bitmatrix Bitmatrix=NewMultiformatwriter (). Encode (contents, Barcodeformat.qr_code, WIDTH, HEIGHT, hints); Path file=NewFile (FilePath). Topath (); Matrixtoimagewriter.writetopath (Bitmatrix, FORMAT, file); System.out.println ("Create QR Code complete"); } Catch(Exception e) {e.printstacktrace (); } } /*** * @Title: Getqrresult * @Description: Read QR code *@paramFilePath *@return * @authorDoubledumbao * @ Modified: February 26,

Zxing This is Google'sHttp://code.google.com/p/zxing/downloads/listTwo-dimensional code source case Packagecom.utils;ImportJava.awt.image.BufferedImage;ImportJava.awt.image.DataBufferByte;ImportJava.io.File;Importjava.io.IOException;Importjava.util.Date;Importjava.util.Hashtable;ImportJavax.imageio.ImageIO;ImportCom.google.zxing.BarcodeFormat;ImportCom.google.zxing.EncodeHintType;ImportCom.google.zxing.Mult

Program source code and executable file: Http://files.cnblogs.com/rainboy2010/zxingdemo.zipZxing, an extremely powerful bar code parsing class Library, the following explains how to use the Zxing class library to implement sweep sweep function, first put on a:The main code is as follows:1. Get the preview image in the Onpreviewframe method and pass it to Decodehandler to parsepublic void Onpreviewframe (byte[] data, camera camera) {point camerare

First of all, my test scenario is "identify the two-dimensional code printed on paper", look for the QR code in the scan results and identify it, instead of just letting the camera scan the QR code.Zbar and zxing are using their own DLL compiled from GitHub's clone C + + source/interface, which is the default parameterAgain conclusion: measured about thousands of pictures, two of the accuracy of the library is almost (due to the diversity of the pictu