Android: NonConfigurationInstances cannot be added

I am trying to store the Radio array (a class I created) in the onRetainCustomNonConfigurationInstance method, but then when I try to cast it back with a cast for getLastNonConfigurationInstance I get this error:

java.lang.ClassCastException: android.support.v4.app.FragmentActivity $ NonConfigurationInstances cannot be passed to me .android .... lib.Radio []

Here is my code:

    public void loadFeed() {

    @SuppressWarnings("deprecation")
    final Object data = getLastNonConfigurationInstance();

    // the activity is starting for the first time
    // read the json response and populate the radio stream list
    if(data == null) {

        //test
        Toast.makeText(getApplicationContext(), "1", Toast.LENGTH_SHORT).show();

        populateListFromJson();
    } else {

        //test
        Toast.makeText(getApplicationContext(), "2", Toast.LENGTH_SHORT).show();

        // The activity was destroyed/created automatically, populate the radio stream
        // list with the info load by the previous activity
        final Radio[] radios = (Radio[]) data;
        for(Radio radio : radios) {
            radiosList.add(radio);
        }

        adapter.notifyDataSetChanged();
    }

}

@Override
public Object onRetainCustomNonConfigurationInstance() {
    // TODO Auto-generated method stub
    return radios;
}

      

        
        
        
      

    

Can anyone help me?