Android how to get Network/Wi-Fi IP

I have a question I want get my mobile IP

whether is Network or Wi-Fi

And I try some way , but I don't know why I can't get it

 public class MainActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getLocalIpAddress();
    }
    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()){
                                    Log.e("IP", inetAddress.getHostAddress().toString());
                                    return inetAddress.getHostAddress().toString();
                                }
                    }
            }
        } catch (SocketException ex) {
            Log.e( "Error:" , ex.toString());
          }
        return null ;
        }
}

And this is my Log

fe80::a3c8:4c03:154:8e1d%rmnet_usb0

And this is my AndroidManifest

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

Use this for getting device ip address:

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