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();