Socket was added in API Level 1
1. Declare a Socket named mySocket.
2. In the MainActivity.java file, in the onCreate method, add the line below. This will initialize the mySocket object to null.
mySocket = null;
3. Compile and run!
Next Recommended Article: How to Create a New Streaming Socket Connected to Target Host
Resources:
http://developer.android.com/reference/java/net/Socket.html
http://android-er.blogspot.com/2011/01/simple-communication-using.html