package com.nobeg.util;import java.util.Random;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Bitmap.Config;public class Code {private static final char[] CHARS = {‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, ‘9’,’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 static Code bmpCode;public static Code getInstance() {if(bmpCode == null)bmpCode = new Code();return bmpCode;}//default settingsprivate static final int DEFAULT_CODE_LENGTH = 3;private static final int DEFAULT_FONT_SIZE = 25;private static final int DEFAULT_LINE_NUMBER = 2;private static final int BASE_PADDING_LEFT = 5, RANGE_PADDING_LEFT = 15, BASE_PADDING_TOP = 15, RANGE_PADDING_TOP = 20;private static final int DEFAULT_WIDTH = 60, DEFAULT_HEIGHT = 40;//settings decided by the layout xml//canvas width and heightprivate int width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT;//random word space and pading_topprivate int base_padding_left = BASE_PADDING_LEFT, range_padding_left = RANGE_PADDING_LEFT,base_padding_top = BASE_PADDING_TOP, range_padding_top = RANGE_PADDING_TOP;//number of chars, lines; font sizeprivate int codeLength = DEFAULT_CODE_LENGTH, line_number = DEFAULT_LINE_NUMBER, font_size = DEFAULT_FONT_SIZE;//variablesprivate String code;private int padding_left, padding_top;private Random random = new Random();//验证码图片public Bitmap createBitmap() {padding_left = 0;Bitmap bp = Bitmap.createBitmap(width, height, Config.ARGB_8888); Canvas c = new Canvas(bp);code = createCode();c.drawColor(Color.WHITE);Paint paint = new Paint();paint.setTextSize(font_size);for (int i = 0; i < code.length(); i++) {randomTextStyle(paint);randomPadding();c.drawText(code.charAt(i) + "", padding_left, padding_top, paint);}for (int i = 0; i < line_number; i++) {drawLine(c, paint);}c.save( Canvas.ALL_SAVE_FLAG );//保存c.restore();//return bp;}public String getCode() {return code;}//验证码private String createCode() {StringBuilder buffer = new StringBuilder();for (int i = 0; i < codeLength; i++) {buffer.append(CHARS[random.nextInt(CHARS.length)]);}return buffer.toString();}private void drawLine(Canvas canvas, Paint paint) {int color = randomColor();int startX = random.nextInt(width);int startY = random.nextInt(height);int stopX = random.nextInt(width);int stopY = random.nextInt(height);paint.setStrokeWidth(1);paint.setColor(color);canvas.drawLine(startX, startY, stopX, stopY, paint);}private int randomColor() {return randomColor(1);}private int randomColor(int rate) {int red = random.nextInt(256) / rate;int green = random.nextInt(256) / rate;int blue = random.nextInt(256) / rate;return Color.rgb(red, green, blue);}private void randomTextStyle(Paint paint) {int color = randomColor();paint.setColor(color);paint.setFakeBoldText(random.nextBoolean()); //true为粗体，false为非粗体float skewX = random.nextInt(11) / 10;skewX = random.nextBoolean() ? skewX : -skewX;paint.setTextSkewX(skewX); //float类型参数，负数表示右斜，整数左斜//paint.setUnderlineText(true); //true为下划线，false为非下划线//paint.setStrikeThruText(true); //true为删除线，，false为非删除线}private void randomPadding() {padding_left += base_padding_left + random.nextInt(range_padding_left);padding_top = base_padding_top + random.nextInt(range_padding_top);}}
yanzhengma_img = (ImageView) findViewById(R.id.yanzhengma_img);yanzhengma_huan = (Button) findViewById(R.id.yanzhengma_huan);yanzhengma_val = (EditText) findViewById(R.id.yanzhengma_val);yanzhengma_img.setImageBitmap(code.getInstance().createBitmap());System.out.println("验证码："+code.getInstance().getCode());yanzhengma_huan.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {yanzhengma_img.setImageBitmap(code.getInstance().createBitmap()); System.out.println("验证码："+code.getInstance().getCode()); }});
一定要成为你工作最大的资产。
