从android客户端连接到python服务器相同的局域网

Question

我正在尝试从android应用程序（在同一LAN上）连接到python服务器，它在以下行失败：

android（客户端）：

try {
        Socket s = new Socket("192.168.1.9", 5402);//<--- time out error
    } catch (Exception e) {
        e.printStackTrace();
    }

服务器（在我的计算机上）：

import socket  # Import socket module
soc = socket.socket()         # Create a socket object
host = "127.0.0.1" # Get local machine name
port = 5402                # Reserve a port for your service.
soc.bind((host, port))       # Bind to the port
soc.listen(1)                 # Now wait for client connection.
while True:
  conn, addr = soc.accept()     # Establish connection with client.
  print ("Got connection from",addr)
  msg = conn.recv(1024)
  print (msg)

我收到超时错误。我成功连接到用Java编写的Java。有任何想法吗？