Android栗子の图片验证码生成

import java.util.Random;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint; public class Autjcode {    private static Autjcode bmpCode;    private int width = 100, height = 60;    private int base_padding_left = 15, range_padding_left = 5,            base_padding_top = 25, range_padding_top = 30;    private int codeLength = 4, line_number = 2, font_size = 25;    private String code;    private int padding_left, padding_top;    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' };     /**     * 获得实例     *      * @return     */    public static Autjcode getInstance() {        if (bmpCode == null)            bmpCode = new Autjcode();        return bmpCode;    }     private Random random = new Random();     /**     * 创建位图     *      * @return     */    public Bitmap createBitmap() {        padding_left = 0;        // ARGB_8888表示为32位的ARGB位图        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);        paint.setFakeBoldText(true);         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();    }     /**     * 划线     *      * @param canvas     * @param paint     */    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());        float skewX = random.nextInt(11) / 10;        skewX = random.nextBoolean() ? skewX : -skewX;        paint.setTextSkewX(skewX);    }     private void randomPadding() {        padding_left += base_padding_left + random.nextInt(range_padding_left);        padding_top = base_padding_top + random.nextInt(range_padding_top);    }}

使用方法：
初始化：

registerAuthimg = (ImageView) findViewById(R.id.registerAuthimg);registerAuthimg.setImageBitmap(Autjcode.getInstance().createBitmap());

验证码刷新：

registerAuthimg.setImageBitmap(Autjcode.getInstance().createBitmap());

获取当前显示的文字验证码：

String Autecodeimg = Autjcode.getInstance().getCode().toUpperCase();

来源与个人博客：http://www.coocj.top/post-41.html

更多相关文章

随机推荐