/**
  * register http and https scheme, and got ThreadSafeClientConnManager
  *
  * @return ThreadSafeClientConnManager
  */
 private ThreadSafeClientConnManager createClientConnManager(BasicHttpParams httpParams) {
   SchemeRegistry schemeRegistry = new SchemeRegistry();
   SSLSocketFactory socketFactory = MySSLSocketFactory.getFixedSocketFactory();
   schemeRegistry.register(
       new Scheme(
           Consts.SCHEME_HTTP,
           PlainSocketFactory.getSocketFactory(),
           HttpConfig.DEFAULT_HTTP_PORT));
   schemeRegistry.register(
       new Scheme(Consts.SCHEME_HTTPS, socketFactory, HttpConfig.DEFAULT_HTTPS_PORT));
   return new ThreadSafeClientConnManager(httpParams, schemeRegistry);
 }