Initial Upload.
Updated TcpSender.java.
Make TcpSender class close Sockets after sending messages and reopen Sockets before sending message. Also updates TcpSenderTest accordingly.
Updated TcpReceiverTest.java.
Try to resolve the timeout failure by removing setDaemon(true) method.
Updated TcpSender.java.
Added more comments.
Updated TcpReceiverWorker.java.
Correct the comments.
Updated TcpReceiver.java.
Added more comments and renamed variable to be more clear.
Updated package name for merging
Changed from messengerapp to com.example.myfirstapp.
Merge branch 'merge'
Updated MainActivity.java.
Include codes to start TcpSender and TcpReceiver when the App is
started.
Updated fragment_main.xml.
Added a TextView with id 'display_text' to display incoming messages.
Merge pull request #1 from shunghsiyu/master

Added TcpSender and TcpReceiver.