java - IP address for Android webservice -

now have been through tutorial login/register web service on android app & stopped here in android activity once requested me put localhost link via ip address of computer, problem ip address should type in there & how find it?

appconfig.java

package info.androidhive.loginandregistration.app;  public class appconfig {     // server user login url     public static string url_login = "http://192.168.0.101/android_login_api/";      // server user register url     public static string url_register = "http://192.168.0.101/android_login_api/"; }