captcha = (Captcha) findViewById(R.id.captCha);
   captcha.setBitmap(url);
   captcha.setCaptchaListener(new Captcha.CaptchaListener() {
            @Override
            public String onAccess(long time) {
                Toast.makeText(MainActivity.this,"验证成功",Toast.LENGTH_SHORT).show();
                return "验证通过,耗时"+time+"毫秒";
            }

            @Override
            public String onFailed(int failedCount) {
                Toast.makeText(MainActivity.this,"验证失败",Toast.LENGTH_SHORT).show();
                return "验证失败,已失败"+failedCount+"次";
            }
            
            @Override
            public String onMaxFailed() {
                Toast.makeText(MainActivity.this,"验证超过次数，你的帐号被封锁",Toast.LENGTH_SHORT).show();
                  return "验证失败,帐号已封锁";
            }
        });

public abstract class CaptchaStrategy {

  protected Context mContext;

  public CaptchaStrategy(Context ctx) {
      this.mContext = ctx;
  }

  protected Context getContext() {
      return mContext;
  }

  /**
   * 定义拼图缺块的形状
   *
   * @param blockSize 单位dp，注意转化为px,缺块的大小，注意Path的边界不要超出此大小
   * @return path of the shape
   */
  public abstract Path getBlockShape(int blockSize);

  /**
   * 根据整张拼图的宽高和拼图缺块大小定义拼图缺块的位置
   *
   * @param width  picture width
   * @param height picture height
   * @return position info of the block
   */
  public abstract PositionInfo getBlockPostionInfo(int width, int height, int blockSize);

  /**
    * 定义滑块图片的位置信息(只有设置为无滑动条模式有用并建议重写)
    *
   * @param width  picture width
   * @param height picture height
   * @return position info of the block
   */
  public PositionInfo getPositionInfoForSwipeBlock(int width, int height, int blockSize){
      return getBlockPostionInfo(width,height,blockSize);
  }

  /**
   * 定义拼图缺失部分阴影的Paint
   */
  public abstract Paint getBlockShadowPaint();

  /**
   * 获得拼图缺块图片的Paint
   */
  public abstract Paint getBlockBitmapPaint();

  /**
   * 装饰滑块图片，在绘制图片后执行，即绘制滑块前景
   * @params canvas
   * @params shape   缺块的形状
   */
  public void decoreateSwipeBlockBitmap(Canvas canvas, Path shape) {

  }
}

captCha.setCaptchaStrategy(new XXXCaptchaStrategy(context));

captcha.setSeekBarStyle(R.drawable.po_seekbar,R.drawable.thumb);