支持代理

[caofangkun]

https://github.com/xingePush/xinge-api-java/blob/master/src/main/java/com/tencent/xinge/XingeApp.java#L42

String hostname = "localhost"/*127.0.0.1*/;
int port = 1080;
Proxy proxy = new Proxy(Proxy.Type.SOCKS,
        new InetSocketAddress(hostname, port));

  OkHttpClient.Builder builder = new OkHttpClient.Builder().proxy(proxy);
  OkHttpClient client = builder.build();