Android : how to use setOnItemSelectedEvenIfUnchangedListener

I saw this post Spinner : onItemSelected not called when selected item remains the same that may able to solve my problem. but i have problem to use it in my code. may i know how does it works?

I created a class for the spinner and changed the xml file .. it doesn't crash but it still doens't function the way i want. what i want it to function is the onitemselected function even when i select the same item

Part of my code for Main class and others

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    gestureDetector = new GestureDetector(this,new SwipeGestureDetector());
    MySpinner toList = (MySpinner) findViewById(R.id.toList);
    dataAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, new ArrayList<String>());
    dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    toList.setAdapter(dataAdapter);
    toList.setOnItemSelectedListener(listener);

........

public class CustomOnItemSelectedListener implements OnItemSelectedListener  //Function when the dropdown menu item is choosen
{

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int pos,long id) 
    {