I am trying to access what level that has been choosen when starting the Unity application. Unity is started from my (Android java) UnityPlay class. I want to know what button that was pressed to launch Unity to know what scene to load.

The UnityPlay class:

package com.company.project;
    ...
    public class UnityPlay extends UnityPlayerActivity{

    public String selectedItem;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }
    public String getSelectedItem() {
        selectedItem = "levelname";
       return selectedItem;
       }
}

In Unity a script is created and added to a object:

function Start() {
    yield WaitForSeconds(3.0);
    var jo = new AndroidJavaObject("com.company.project.UnityPlay");
    var level = jo.Call.<String>("getSelectedItem");

    Application.LoadLevel(level);
}

As far as I can see the return value of the request is null or a blank String "".