Research on Comprehensive Training Platform for Software Engineering Based on Android

The client uses the countdown display control and input pen to write the required Chinese characters, complete the writing and modify the Chinese characters, submit the result, and then wait for the server to judge. as shown in Figure 2.

Figure 2.

Record the team and team members information, access client input Chinese characters and display on the big screen, server controls the time of competition, show the correct answer after the client completed the submission. The judges give the points and calculate the result of the competition. The structure is shown in Figure 3.

Figure 3.

Network communication concept and skillset is a weakness for many software engineering students. Understand and master the network architecture and communication model is the key to address this problem. This is the core part of the training platform. The end system in Figure 4 is the PC, mobile phones and other entities in the communication application process. The relay system is a router with routing and packet forwarding function. The development of network communication process based on Android system needs to have a bridge-like abstract unit connected to the application process. In the Android system, we can use the existing Socket class to complete, and the interface Socket in the TCP / IP architecture is located in the Application Layer and Transport Layer, as shown in Figure 5. From the figure if there is no interface, the entire communication will not be able to proceed; it is like we cannot send mail without postman. To understand the network structure specifically, students need to start from the horizontal peer-to-peer communication and the vertical direction of the actual data transfer. Understanding both the horizontal and the vertical levels of communication is difficult. The system training platform uses the TCP connection and socket interface to complete the underlying communication, achieving the correct timing and answer transmission with the send and receive functions. Students through the Android based training platform can experience a specific communication process.

Figure 4.

Figure 5.

A particular communication process: The Server first starts the service, the establishment of SOCKET and begins to listen to the state and waits to connect, and start the service. The Client press the start button, set the client writing time and other display information. The Client enters into the connection state, the Client answers. After entering the answer and establish a connection with the Server, the answer is sent to the Server-side.

The comprehensive training platform design and development uses the currently popular object-oriented approach. The design of the class and the various types of functional methods are: The boot interface Start, write interface class HztxView, write control class Hztx, and internal class (answer list class DatiListener, end of the answer list class JieshuListener, timing class MyCount), writing action classes MyAction and subclasses (writing class MyPath and erase class MyEraser), etc. …

When the PC server sends a start entering command, the Android client counts down based on the received time and displays the correct answer at the end of the time for the judges and the audience to end the competition. The server can view all teams and player scores and rankings, and to send the required information to the client.