如何从设备获取默认IP地址？

Question

我需要知道，因为当我发送广播包时，我无法检查它是否来自我自己。我的代码问题是Android，它在桌面上工作正常。对于Android它一直给我一个IPV6但它给我的广播地址是正常的......

Answer 1

此函数将返回主机的IP地址。

private String getHostIpAddress() throws SocketException {
    Enumeration<NetworkInterface> interfaces;
    interfaces = NetworkInterface.getNetworkInterfaces();
    while (interfaces.hasMoreElements()) {
        NetworkInterface current = interfaces.nextElement();
        if (!current.isUp() || current.isLoopback() || current.isVirtual())
            continue;
        Enumeration<InetAddress> addresses = current.getInetAddresses();
        while (addresses.hasMoreElements()) {
            InetAddress currentAddr = addresses.nextElement();
            if (currentAddr.isSiteLocalAddress()) 
                return currentAddr.getHostAddress();                
        }
    }
    return null;
}

Answer 2

您可以使用以下代码获取设备的IP地址：

WifiManager wm = (WifiManager) getSystemService(WIFI_SERVICE);
String ip = Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress());