如何通过他的手机/平板电脑在我的Android应用程序上获得用户IP地址上网[重复]

这将在屏幕上加载ip地址

 webview.loadUrl("http://www.whatismyip.com")

public static String getipAddress() { 
            try {
                for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
                    NetworkInterface intf = en.nextElement();
                    for (Enumeration enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                        InetAddress inetAddress = enumIpAddr.nextElement();
                        if (!inetAddress.isLoopbackAddress()) {
                            String ipaddress=inetAddress.getHostAddress().toString();
                            Log.e("ip address",""+ipaddress);
                            return ipaddress;
                        }
                    }
                }
            } catch (SocketException ex) {
                Log.e("Socket exception in GetIP Address of Utilities", ex.toString());
            }
            return null; 
    }

还添加了mainfest

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