Android QR code generation

To download a class library core. jar, click the open link in my resource file.

Import java. io. File;
Import java. io. FileNotFoundException;
Import java. io. FileOutputStream;
Import java. io. IOException;
Import java. io. UnsupportedEncodingException;

Import android. app. Activity;
Import android. graphics. Bitmap;
Import android. OS. Bundle;
Import android. OS. Environment;
Import android. view. SurfaceHolder;
Import android. view. SurfaceView;
Import android. view. View;
Import android. view. View. OnClickListener;
Import android. widget. Button;
Import android. widget. ImageView;
Import android. widget. TextView;

Import com. google. zxing. BarcodeFormat;
Import com. google. zxing. MultiFormatWriter;
Import com. google. zxing. WriterException;
Import com. Google. zxing. Common. bitmatrix;

Public class erweimashezhiactivity extends activity implements surfaceholder. Callback {
Button zuotiananniu, youbiananniu, fenxiangwodemingpian, jinruwodevzu;
Textview zhongjianzifu;
Private surfaceview msurfaceview01;
Private surfaceholder msurfaceholder01;
Final string imagefilename = "2dcode.png ";
Fileoutputstream Fos = NULL;
@ Override
Protected void oncreate (bundle savedinstancestate ){
// Todo auto-generated method stub
Super. oncreate (savedinstancestate );
Setcontentview (R. layout. activity_erweimashezhi );



String Xinxi = "mobile phone number:" + "123456789" + "\ n mailbox:" + "a@a.com" + "\ n company:" + "MFO"
+ "\ N address:" + "xxxxxxx12345" + "\ n fixed address:" + "123456" + "\ n zip code:" + "123456 ";
System. Out. println (Xinxi );
Try {
Bitmap bitmap = create2dcode (Xinxi );
If (null! = Bitmap) {// Save the QR code image to a file
File file = new File (Environment. getExternalStorageDirectory (), imageFileName );
Fos = new FileOutputStream (file );
Bitmap. compress (Bitmap. CompressFormat. PNG, 0, fos );
}
ImageView imagview = (ImageView) findViewById (R. id. erweimatupian );
Imagview. setImageBitmap (bitmap );
// Canvas canvas = new Canvas (bitmap );
} Catch (WriterException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
} Catch (UnsupportedEncodingException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
} Catch (FileNotFoundException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
} Finally {
Try {
Fos. close ();
} Catch (IOException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
}
}
}
Public Bitmap Create2DCode (String str) throws WriterException, UnsupportedEncodingException {
// Generate a two-dimensional matrix with the specified size during encoding. Do not scale the image after it is generated. This will result in Fuzzy Identification failure.
Str = new String (str. getBytes ("UTF-8"), "ISO-8859-1 ");//
BitMatrix matrix = new MultiFormatWriter (). encode (str, BarcodeFormat. QR_CODE, 300,300 );
Int width = matrix. getWidth ();
Int height = matrix. getHeight ();
// Convert the two-dimensional matrix into a one-dimensional pixel array, that is, it is always horizontally arranged
Int [] pixels = new int [width * height];
For (int y = 0; 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 );
// Generate bitmap Using pixel arrays. For details, refer to the api
Bitmap. setpixels (pixels, 0, width, 0, 0, width, height );
Return bitmap;
}
Public void surfacechanged (surfaceholder holder, int format, int width,
Int height ){
// Todo auto-generated method stub

}
Public void surfacecreated (surfaceholder holder ){
// Todo auto-generated method stub

}
Public void surfaceDestroyed (SurfaceHolder holder ){
// TODO Auto-generated method stub

}
}