android AsyncHttpClient 经常性超时，连接时ios没有问题

android AsyncHttpClient 经常性超时，连接时ios没有问题，连接wifi，有谁知道原因吗？
12-08 13:39:40.085: W/System.err(9001): org.apache.http.conn.ConnectTimeoutException: Connect to /222.73.40.236:80 timed out
12-08 13:39:40.085: W/System.err(9001):  at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:121)
12-08 13:39:40.085: W/System.err(9001):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
12-08 13:39:40.085: W/System.err(9001):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
12-08 13:39:40.085: W/System.err(9001):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
12-08 13:39:40.085: W/System.err(9001):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
12-08 13:39:40.085: W/System.err(9001):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
12-08 13:39:40.085: W/System.err(9001):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
12-08 13:39:40.085: W/System.err(9001):  at com.netfinworks.ofa.httpclient.AsyncHttpRequest.makeRequest(AsyncHttpRequest.java:79)
12-08 13:39:40.085: W/System.err(9001):  at com.netfinworks.ofa.httpclient.AsyncHttpRequest.makeRequestWithRetries(AsyncHttpRequest.java:96)
12-08 13:39:40.095: W/System.err(9001):  at com.netfinworks.ofa.httpclient.AsyncHttpRequest.run(AsyncHttpRequest.java:57)
12-08 13:39:40.095: W/System.err(9001):  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
12-08 13:39:40.095: W/System.err(9001):  at java.util.concurrent.FutureTask.run(FutureTask.java:237)
12-08 13:39:40.095: W/System.err(9001):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
12-08 13:39:40.095: W/System.err(9001):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
12-08 13:39:40.095: W/System.err(9001):  at java.lang.Thread.run(Thread.java:841)