我正在为我的安卓手机客户端服务器应用程序。

I am making a Client Server application for my Android phone.

我在的Python 它位于和侦听连接创建一个 UDP 服务器。

I have created a UDP Server in Python which sits and listens for connections.

我可以把任一服务器 IP 直接解决诸如 192.169.0.100 ，并将其发送数据的罚款。我也可以把 192.168.0.255 并找到服务器 192.169.0.100 。

I can put either the server IP address in directly like 192.169.0.100 and it sends data fine. I can also put in 192.168.0.255 and it find the server on 192.169.0.100.

是否有可能让我的Andr​​oid手机连接到网络的广播地址？我只是以往任何时候都使用此应用程序我的无线网​​络或其他无线网​​络上。

Is it possible to get the broadcast address of the network my Android phone is connected to? I am only ever going to use this application on my Wifi network or other Wifi networks.

干杯

推荐答案

随着广播IP地址是当前的IP地址，但随着255完成，你可以做这样的事情：

As the broadcast IP address is the current IP address but finishing with 255, you can do something like this:

public String getLocalIpAddress() {
    try {
        for (Enumeration<NetworkInterface> en = NetworkInterface
                .getNetworkInterfaces(); en.hasMoreElements();) {
            NetworkInterface intf = en.nextElement();
            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                InetAddress inetAddress = enumIpAddr.nextElement();
                if (!inetAddress.isLoopbackAddress()) {
                    return inetAddress.getHostAddress().toString();
                }
            }
        }
    } catch (SocketException ex) {}
    return null;
}

public static String getBroadcast() throws SocketException {
    System.setProperty("java.net.preferIPv4Stack", "true");
    for (Enumeration<NetworkInterface> niEnum = NetworkInterface.getNetworkInterfaces(); niEnum.hasMoreElements();) {
        NetworkInterface ni = niEnum.nextElement();
        if (!ni.isLoopback()) {
            for (InterfaceAddress interfaceAddress : ni.getInterfaceAddresses()) {
                return interfaceAddress.getBroadcast().toString().substring(1);
            }
        }
    }
    return null;
}