code: public static void clean() {
          try {
              if (singleServer != null) {
                  singleServer.shutdown();
              }
          } catch (Exception e) {
              // do nothing
          }
          singleServer = null;
          httpClient = null;
          try {
              getHttpCollector().clean0();
          } catch (Exception e) {
              e.printStackTrace();
          }
          httpCollector = null;
      }
docs: 清理操作。
  若需更改 isRecord、isUpload 的值，请在此方法调用前修改。