Android : spinner setOnItemSelectedListener not working

I have open a spinner on button click. Now when I select an item of spinner, my setOnItemSelectedListener is not fired. Only the spinner gets closed on selecting an item.

The code is below:-

holder.button.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            final Spinner spinner = new Spinner(activity);
            spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

                @Override
                public void onItemSelected(AdapterView<?> parent, View view,
                        int position, long id) {
                    Toast.makeText(activity,"Selected",Toast.LENGTH_LONG).show();
                }

                @Override
                public void onNothingSelected(AdapterView<?> parent) {
                    // TODO Auto-generated method stub

                }
            });
            final CustomSpinnerAdapter adapter = new CustomSpinnerAdapter(
                    activity);
            spinner.setAdapter(adapter);
            spinner.performClick();
        }
    });