Android : How to add a drop-down menu on any given actionbar icon

I have been trying to create a simple drop down menu when I click my action bar icon and have certain selections link to particular activities.

Something like this:

I've tried to follow this but no luck.

Android ActionBar ActionProvider submenu

How to add submenu items to ActionBar action in code?

Currently I have this as my Java code, but the drop down menu appears under my appname instead of the overflow icon:

    public boolean onCreateOptionsMenu(Menu menu){
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);
        return true;
    }



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        super.onCreate(savedInstanceState);

        SpinnerAdapter adapter =
                ArrayAdapter.createFromResource(this, R.array.actions,
                        android.R.layout.simple_spinner_dropdown_item);

// Callback
        OnNavigationListener callback = new OnNavigationListener() {

            String[] items = getResources().getStringArray(R.array.actions); // List items from res

            @Override
            public boolean onNavigationItemSelected(int position, long id) {

                // Do stuff when navigation item is selected

                Log.d("NavigationItemSelected", items[position]); // Debug

                return true;

            }

        };