code: private Path getNoneCornerPath(int width, int height) {
          int halfW = width / 2, halfH = height / 2;
          int c = cornerSize;
          Path p = new Path();
          // 左上角
          p.moveTo(c > halfW ? halfH : c, c > halfH ? halfH : c);
          // 右上角
          p.lineTo(width - (c > halfW ? halfW : c), c > halfH ? halfH : c);
          // 右下角
          p.lineTo(width - (c > halfW ? halfW : c), height - (c > halfH ? halfH : c));
          // 左下角
          p.lineTo(c > halfW ? halfH : c, height - (c > halfH ? halfH : c));
          // 关闭
          p.close();
          return p;
      }
docs: 获取去除所有边角之后的实体框