how to make android java sub class object using AndroidJavaClass or AndroidJavaObject

in my case i wont to make class object it is part of android WifiManager like WifiManager.LocalOnlyHotspotCallback but i can't access it i can try this

 AndroidJavaObject activity = new AndroidJavaClass("com.unity3d.player.UnityPlayer").GetStatic<AndroidJavaObject>("currentActivity");
                 AndroidJavaObject WifiManager = activity.Call<AndroidJavaObject>("getSystemService", "wifi");
                 AndroidJavaObject startLocalOnlyHotspot = WifiManager.Call<AndroidJavaObject>("startLocalOnlyHotspot");

but its not work