How to open the options menu programmatically?

Question

I would like to open the optionsMenu programmatically without a click on the menu key from the user. How would I do that?

Answer 1

For me, declaring toolbar.showOverflowMenu() in onClick is not worked. openOptionsMenu() also not worked for me. Instead of that the following way is worked for me,

new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                toolbar.showOverflowMenu();
            }
        }, 500);