20130927 Modify networkfragment layout, change icon size.
Modify userHelper, use application context.
20130927 define server type public const.
20130927 Add ServerInfo debug message
20130927 clean code, JoinNetworkActivity.
20130927 clean code.
20130927 fix error of JoinNetworkActivity.
20130927 modify ConnectHelper, add release listener menthod.
20130928 Modify joinNetwork.
Merge branch 'master' of github.com:liangxiaofei1100/AndroidCommunication