Android获取用户ip地址

public class NetManager {

    /**
     * 获取用户IP地址

     * 注意：需要在androidManifest.xml中声明下面三个权限才能正常使用该方法，否则会空指针异常
     * 
     * 
     * 
     */
    public static String getIpAddress(Context context) {
        if (context == null) {
            return "";
        }

        ConnectivityManager conMann = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mobileNetworkInfo = conMann.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        NetworkInfo wifiNetworkInfo = conMann.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

        if (mobileNetworkInfo.isConnected()) {
            return getLocalIpAddress();
        } else if (wifiNetworkInfo.isConnected()) {
            return getWifiAddress(context);
        }
        return "";
    }

    private static String getLocalIpAddress() {
        try {
            ArrayList<NetworkInterface> nilist = Collections.list(NetworkInterface.getNetworkInterfaces());
            for (NetworkInterface ni : nilist) {
                ArrayList<InetAddress> ialist = Collections.list(ni.getInetAddresses());
                for (InetAddress address : ialist) {
                    if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
                        return address.getHostAddress();
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
        return "";
    }

    private static String getWifiAddress(Context context) {
        if (context == null) {
            return "";
        }
        WifiManager wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        WifiInfo wifiInfo = wifiManager.getConnectionInfo();
        int ipAddress = wifiInfo.getIpAddress();
        return intToIp(ipAddress);
    }

    private static String intToIp(int ipInt) {
        String s = (ipInt & 0xFF) + "." +
                ((ipInt >> 8) & 0xFF) + "." +
                ((ipInt >> 16) & 0xFF) + "." +
                ((ipInt >> 24) & 0xFF);
        return s;
    }
}

经过实测，并不能真的获取到网络上实际的外网IP地址，只能拿到他下面的内网IP地址，凑合着用吧

参考来源：https://blog.csdn.net/sinat_16458039/article/details/50260589