Android development: Native Tomcat build server, client socket network connection not problem and D-Link port forwarding settings

I use my own computer to build a server, the first problem is that we need port mapping on the router, the outside network to access their own computers, how to port mapping can look at this article:

http://blog.csdn.net/zhoubin1992/article/details/45917775

One, D-Link port forwarding settings

Mine is D-Link.

Name write the name of your client.

IP address: The IP address assigned by the router to the native, typically starting with 192.168. Query method: cmd under ipconfig

Fill in the private port is the router needs to open the port, you can also set a range

The public port is the port to be accessed by the external network.

The traffic type is optional.

Second, the socket Communication program error

Execute to socket socket=new socket ("xx.xx.xxx.xxx", 8888); throw exception. Report timeout error.

The reason is that the client is not connected to the socket.

Workaround:

1, first determine another thread to complete the network connection.

New Thread () {public void run () {try{//connects the network and opens        the stream s = new Socket ("110.83.75.12", 8888);        Dout = new DataOutputStream (S.getoutputstream ());        DIN = new DataInputStream (S.getinputstream ());} catch (Exception e) {//catch exception e.printstacktrace ();//Print Exception}

2, this still does not, finally inStackOverflow found the answer,also needOpen Strictmode in OnCreate

     Strictmode.setthreadpolicy (New StrictMode.ThreadPolicy.Builder ()                 . Detectdiskreads ()                 . Detectdiskwrites ()                 . Detectnetwork ().              penaltylog ()                 . Build ());          Strictmode.setvmpolicy (New StrictMode.VmPolicy.Builder ()                 . Detectleakedsqlliteobjects ()              . Penaltylog ()                 . Penaltydeath ()                 . Build ());     }

I also do not know why to add strict mode, some people know the message to tell me.

It's time to communicate, but when I use my own 3G traffic, there's a problem. The problem of socket native IP was found after lookup.

This machine also has an external network IP, obtain method: In Baidu fill in the native IP , the real IP of this machine is present.

Then the Socket ("xx.xx.xxx.xxx", 8888), the IP replacement is good ~

Android development: Native Tomcat build server, client socket network connection not problem and D-Link port forwarding settings