Android 设备到 PC 的套接字连接

I have written some code for this purpose but the code is giving me an exception as:

TCP Error:java.net.ConnectException:/127.0.0.1:8080-connection refused

我的代码如下:

private static TextView txtSendStatus;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        initControls();


        String sentence = "TCP Test #1n";
        String modifiedSentence;

        try {

            Socket clientSocket = new Socket("192.168.18.116", 8080);
            DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
            BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
            printScr("TCP Connected.");

            outToServer.writeBytes(sentence + 'n');
            modifiedSentence = inFromServer.readLine();
            printScr(modifiedSentence);
            printScr("TCP Success !!!");

            clientSocket.close();

        } catch (Exception e) {
           printScr("TCP Error: " + e.toString());
        }
    } 
    private void initControls()
    {
          txtSendStatus = (TextView)findViewById(R.id.txtSendStatus);
    }

    public static void printScr(String message)
    {
           txtSendStatus.append( "n" + message );
    }

有谁能告诉我答案吗?我正在等待正确的答案.