public class serverTest {
 public static void main(String[] args) {
  try {
    ServerSocket serverSocket=new ServerSocket(7777);
    System.out.println("服务器已经在7777端口上启动了");
    while (true) {
      //有阻塞的功能,拿不到socket下面的方法也不会执行
      Socket socket=serverSocket.accept();
      System.out.println("有客户端发出请求了");
      new ServerThread(socket).start();
    }
  } catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
  }
 }
}

public class ServerThread extends Thread{
  private Socket socket;
  OutputStream outputStream;
  public ServerThread(Socket socket) {
    this.socket=socket;
  }
  @Override
  public void run() {
    // TODO Auto-generated method stub
    try {
      outputStream=socket.getOutputStream();
      outputStream.write(("服务器端的时间"+new Date()).getBytes("UTF-8"));
      outputStream.flush();
      outputStream.close();
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    super.run();
  }
}

public void click(View view){
  new Thread(){
    public void run() {
      try {
        //客户端从服务端获取数据
        Socket client=new Socket("169.254.244.141", 7777);
        BufferedReader bufferedReader=
            new BufferedReader
            (new InputStreamReader
                (client.getInputStream()));
        String text=bufferedReader.readLine();
        //tv.setText(text);
        //线程复用
        Message msg= Message.obtain();
        msg.what=0x123;
        msg.obj=text;
        handler.sendMessage(msg);
      } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    };
  }.start();
}