Android multiplayer using WiFi

Hello everyone, I want to develop an android game which go multiplayer over the wifi (something like "Doodle Army 2: Mini Militia"). I have tried everything which is available on the internet but nothing helped me. I made a game which can go multiplayer on the same system(computer) but when I try it on android devices(making one android device as hotspot and other to connect to it via wifi), it doesn't works. I don't know what is the problem. I am using the following script to handle all of the networking related tasks. Please help! Thank you.

using UnityEngine; using UnityEngine.Networking; using gui = UnityEngine.GUILayout;

public class Network : MonoBehaviour { public GameObject PlayerPrefab; string ip = "127.0.0.1"; private const string typeName = "typename"; private const string gameName = "gamename"; private HostData[] hostList;

 public void CreatePlayer()
 {
     connected = true;
     GameObject g = Network.Instantiate(PlayerPrefab, transform.position, Quaternion.identity, 1) as GameObject;
     GameObject.Find("PlayerCamera").GetComponent<Camera>().enabled = true;
     Destroy(GameObject.Find("MenuCamera"));
 }
 void OnDisconnectedFromServer()
 {
     connected = false;
 }
 void OnPlayerDisconnected(NetworkPlayer pl)
 {
     Network.DestroyPlayerObjects(pl);
 }
 void OnConnectedToServer()
 {
     Debug.Log("Connected to Server");
     CreatePlayer();
 }
 void OnServerInitialized()
 {
     Debug.Log("Server Initializied");
     CreatePlayer();
 }
 private void RefreshHostList()
 {
     MasterServer.RequestHostList(typeName);
 }
 void OnMasterServerEvent(MasterServerEvent msEvent)
 {
     if (msEvent == MasterServerEvent.HostListReceived)
         hostList = MasterServer.PollHostList();
 }
 bool connected;
 void OnGUI()
 {
     if (!connected)
     {
         ip = GUI.TextField(new Rect(5, 5, 150, 50), ip, 25);
         if (GUI.Button(new Rect(5, 70, 150, 70), "connect"))
         {
             Network.Connect(hostList[0]);      //Both ways are tried but
             Network.Connect("127.0.0.1", 25000, "");     //nothing works.
         }
         GUI.enabled = true;
         if (GUI.Button(new Rect(5, 150, 150, 70), "host"))
         {
             Network.InitializeServer(32, 25000, false);
             MasterServer.RegisterHost(typeName, gameName);
             Network.sendRate = 15;
         }
     }
 }

}