问如何以编程方式查找设备的公有IP地址？

EN

 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

public String GetDeviceipMobileData(){
    try {
        for (java.util.Enumeration<java.net.NetworkInterface> en = java.net.NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
            java.net.NetworkInterface networkinterface = en.nextElement();
            for (java.util.Enumeration<java.net.InetAddress> enumIpAddr = networkinterface.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                java.net.InetAddress inetAddress = enumIpAddr.nextElement();
                if (!inetAddress.isLoopbackAddress()) {
                    return inetAddress.getHostAddress().toString();
                }
            }
        }
    } catch (Exception ex) {
        Log.e("Current IP", ex.toString());
    }
    return null;
}


public String GetDeviceipWiFiData(){
    android.net.wifi.WifiManager wm = (android.net.wifi.WifiManager) getSystemService(WIFI_SERVICE);
    @SuppressWarnings("deprecation")
    String ip = android.text.format.Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress());
    return ip;             
}