Android Generate CAPTCHA Image

(Transferred from: http://blog.csdn.net/onlyonecoder/article/details/8231373)

1  PackageCom.nobeg.util;2 3 ImportJava.util.Random;4 5 ImportAndroid.graphics.Bitmap;6 ImportAndroid.graphics.Canvas;7 ImportAndroid.graphics.Color;8 ImportAndroid.graphics.Paint;9 ImportAndroid.graphics.Bitmap.Config;Ten  One  Public classCode { A      -     Private Static Final Char[] CHARS = { -' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', the' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' g ', ' H ', ' J ', ' K ', ' l ', ' m ',  -' n ', ' P ', ' Q ', ' R ', ' s ', ' t ', ' u ', ' V ', ' w ', ' x ', ' y ', ' z ', -' A ', ' B ', ' C ', ' D ', ' E ', ' F ', ' G ', ' H ', ' I ', ' J ', ' K ', ' L ', ' M ',  -' N ', ' P ', ' Q ', ' R ', ' S ', ' T ', ' U ', ' V ', ' W ', ' X ', ' Y ', ' Z ' +     }; -      +     Private StaticCode Bmpcode; A      at      Public StaticCode getinstance () { -         if(Bmpcode = =NULL) -Bmpcode =NewCode (); -         returnBmpcode; -     } -      in     //Default Settings -     Private Static Final intDefault_code_length = 3; to     Private Static Final intDefault_font_size = 40; +     Private Static Final intDefault_line_number = 2; -     Private Static Final intBase_padding_left = Range_padding_left = 20, Base_padding_top = Range_padding_top; the     Private Static Final intDefault_width = Default_height = 80; *      $     //settings decided by the layout XMLPanax Notoginseng     //Canvas width and height -     Private intwidth = default_width, height =Default_height; the      +     //random word space and pading_top A     Private intBase_padding_left = base_padding_left, Range_padding_left =Range_padding_left, theBase_padding_top = base_padding_top, Range_padding_top =Range_padding_top; +      -     //Number of chars, lines; font size $     Private intCodelength = default_code_length, Line_number = default_line_number, font_size =default_font_size; $      -     //variables -     PrivateString Code; the     Private intPadding_left, Padding_top; -     PrivateRandom random =NewRandom ();Wuyi     //Verification Code Picture the      PublicBitmap CreateBitmap () { -Padding_left = 0; Wu          -Bitmap BP =bitmap.createbitmap (width, height, config.argb_8888); AboutCanvas C =NewCanvas (BP); $  -Code =Createcode (); -          - C.drawcolor (color.white); APaint paint =NewPaint (); + paint.settextsize (font_size); the          -          for(inti = 0; I < code.length (); i++) { $ Randomtextstyle (paint); the randompadding (); theC.drawtext (Code.charat (i) + "", Padding_left, padding_top, paint); the         } the  -          for(inti = 0; i < Line_number; i++) { in DrawLine (c, paint); the         } the          AboutC.save (Canvas.all_save_flag);//Save theC.restore ();// the         returnBP; the     } +      -      PublicString GetCode () { the         returnCode;Bayi     } the      the     //Verification Code -     PrivateString Createcode () { -StringBuilder buffer =NewStringBuilder (); the          for(inti = 0; i < codelength; i++) { the buffer.append (Chars[random.nextint (chars.length)); the         } the         returnbuffer.tostring (); -     } the      the     Private voiddrawLine (canvas canvas, paint paint) { the         intcolor =Randomcolor ();94         intStartX =random.nextint (width); the         intStarty =random.nextint (height); the         intSTOPX =random.nextint (width); the         intStopy =random.nextint (height);98Paint.setstrokewidth (1); About paint.setcolor (color); - canvas.drawline (StartX, Starty, stopx, stopy, paint);101     }102     103     Private intRandomcolor () {104         returnRandomcolor (1); the     }106 107     Private intRandomcolor (intRate ) {108         intRed = Random.nextint (256)/Rate ;109         intGreen = Random.nextint (256)/Rate ; the         intBlue = Random.nextint (256)/Rate ;111         returnColor.rgb (red, green, blue); the     }113      the     Private voidRandomtextstyle (Paint paint) { the         intcolor =Randomcolor (); the paint.setcolor (color);117Paint.setfakeboldtext (Random.nextboolean ());//true is bold, false is not bold118         floatSkewx = Random.nextint (11)/10;119Skewx = Random.nextboolean ()? SKEWX:-skewx; -Paint.settextskewx (SKEWX);//float type parameter, negative number for right oblique, integer left oblique121 //Paint.setunderlinetext (true);//true is underlined, false is non-underlined122 //Paint.setstrikethrutext (true);//true is strikethrough, false is non-strikethrough123     }124      the     Private voidrandompadding () {126Padding_left + = Base_padding_left +Random.nextint (range_padding_left);127Padding_top = Base_padding_top +Random.nextint (range_padding_top); -     }129}

Call:

    /**      * Generate Verification Code      *     /privatevoid  Createconfirmcode () {        Mimageview.setimagebitmap (Confirmcode.getinstance ()                . CreateBitmap ());         = confirmcode.getinstance (). GetCode ();            }

Android Generate CAPTCHA Image