Android uses zxing to generate two-dimensional code with images

As follows:

The production process is very simple is to add a logn icon in the original two-dimensional code image, the code of the comments written in detail, it will not give you a long-winded

Package Com.example.day44_02_qrcodewithlogin;import Java.util.hashmap;import Java.util.map;import Android.app.activity;import Android.graphics.bitmap;import Android.graphics.bitmap.config;import Android.graphics.bitmapfactory;import Android.graphics.canvas;import Android.os.bundle;import Android.view.Menu; Import Android.widget.imageview;import Com.google.zxing.barcodeformat;import Com.google.zxing.EncodeHintType; Import Com.google.zxing.writerexception;import Com.google.zxing.common.bitmatrix;import Com.google.zxing.qrcode.qrcodewriter;public class Mainactivity extends Activity {private ImageView imageview_main; @Ov errideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview ( R.layout.activity_main); Initview ();} private void Initview () {Imageview_main = (ImageView) Findviewbyid (R.id.imageview_main);    String content = "We are graduating"; Createqrcode (content,500,500);} /** * Used to create a QR code * @param content * @param width * @param height */private void crEateqrcode (String content, int width, int height) {try {//1, creating instantiated object Qrcodewriter writer = new Qrcodewriter ();//2, setting character set map& Lt Encodehinttype, string> map = new Hashmap<encodehinttype, string> (); Map.put (Encodehinttype.character_set, "    UTF-8 ");//3, the content is written to the matrix object by encode method Bitmatrix matrix = writer.encode (content, Barcodeformat.qr_code, width, height,map);    4, define an array of pixel points of a two-dimensional code, fill the color of each pixel int[] pixels = new Int[width*height]; 5, fill in the color of each pixel (pixel no data is filled with black, no color fill, but generally with white) for (int i = 0; i < height; i++) {for (int j = 0; J < width; j + +) {if ( Matrix.get (J, i)) {pixels[i*width+j] = 0xff000000;} else {pixels[i*width+j] = 0xFFFFFFFF;}}}    6, create a blank Bitmap object that specifies the height and width Bitmap bm_qr = bitmap.createbitmap (width, height, config.argb_8888); 7, fill the color of each pixel into the bitmap object bm_qr.setpixels (pixels, 0, width, 0, 0, width, height);//8, create a bitmap object to use as its icon bitmap bm_login = Bitmapfactory.decoderesource (Getresources (), r.drawable.img_kf_qq);//9, create a method to add a picture to the QR code if (Addlogin (bm_qr,bm_ LOGIN) = null) {Imageview_maIn.setimagebitmap (Addlogin (Bm_qr,bm_login));}} catch (Writerexception e) {//TODO auto-generated catch Blocke.printstacktrace ();}} /** * Used to add a logn to the created QR code * @param BM_QR * @param bm_login * @return */private Bitmap addlogin (Bitmap bm_qr, Bitmap Bm_logi N) {if (BM_QR = = null) {return null;} if (Bm_login = = null) {return BM_QR;} Gets the height of the picture int bm_qr_width = Bm_qr.getwidth (); int bm_qr_height = Bm_qr.getheight (); int bm_login_width = Bm_login.getwidth (); int bm_login_height = Bm_login.getheight ();//Set Logn the size of the QR code for the overall size of 1/5float Scale_login = Bm_qr_width*1.0f/5/bm_login _width;     Bitmap Bitmap = Bitmap.createbitmap (Bm_qr_width, Bm_qr_height, Bitmap.Config.ARGB_8888);            try {Canvas canvas = new canvas (bitmap);            Canvas.drawbitmap (BM_QR, 0, 0, NULL);            Canvas.scale (Scale_login, Scale_login, BM_QR_WIDTH/2, BM_QR_HEIGHT/2);             Canvas.drawbitmap (Bm_login, (bm_qr_width-bm_login_width)/2, (Bm_qr_height-bm_login_height)/2, NULL); Canvas.save (CaNvas.            All_save_flag);        Canvas.restore ();            } catch (Exception e) {bitmap = null;        E.getstacktrace ();  } return bitmap; @Overridepublic boolean Oncreateoptionsmenu (Menu menu) {getmenuinflater (). Inflate (R.menu.main, menu); return true;}}

　　

Android uses zxing to generate two-dimensional code with images