Android栗子の图片验证码生成实例代码

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);  }}

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

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

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