Can't programmatically expand the spinner

[calhouncole]

I'm looking to expand the spinner without needing to physically touch it. I've tried the following and nothing seems to work:

        toolbar = (Toolbar) findViewById(R.id.toolbar);
        spinner = (MaterialToolbarSpinner)
                toolbar.findViewById(R.id.mt_spinner);
        spinnerAdapter = new ToolbarSpinnerAdapter(this);
        spinnerAdapter.setUserAgencyList(agencies);
        spinner.setAdapter(spinnerAdapter);
        spinner.setOnItemSelectedListener(this);
        spinner.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                
            }
        });

//                    spinner.performClick();
//                    spinner.callOnClick();
//                    spinner.animate();
//                    spinner.notify();
//                    spinner.post(new Runnable() {
//                        @Override
//                        public void run() {
//                            spinner.performClick();
//                        }
//                    });
//                    spinnerAdapter.getDropDownView(0, null, toolbar);
//                    spinnerAdapter.getDownView(0, null, toolbar);
//                    spinner.requestFocus();
//                    toolbar.getFocusedChild().performClick();
//                    toolbar.performClick();

It seems that the spinner's onClick() method is never called when physically tapping the component.