为什么我用httpurlconnection获取不到数据？求大神

12-29 15:35:23.930: WARN/System.err(32106): java.net.SocketTimeoutException: Connection timed out
12-29 15:35:23.930: WARN/System.err(32106):     at org.apache.harmony.luni.platform.OSNetworkSystem.connect(Native Method)
12-29 15:35:23.930: WARN/System.err(32106):     at dalvik.system.BlockGuard$WrappedNetworkSystem.connect(BlockGuard.java:357)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:204)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:437)
12-29 15:35:23.960: WARN/System.err(32106):     at java.net.Socket.connect(Socket.java:1002)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:75)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:48)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection$Address.connect(HttpConnection.java:322)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:89)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getHttpConnection(HttpURLConnectionImpl.java:285)
12-29 15:35:23.960: WARN/System.err(32106):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.makeConnection(HttpURLConnectionImpl.java:267)
httpurlconnectionandroid