call a main Activity method from a Fragment button

Question

I am using a standard android Activity, the "Navigation Drawer Activity", and There is a button in the navigation bar

public boolean onOptionsItemSelected(MenuItem item) {
    if (mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }

    if (item.getItemId() == R.id.action_example) {
        Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT)
                .show();
        //getActivity().drawGraph();
        return true;
    }

And I would like to call the drawGraphic() method from my main Activity only when pressing the boot

It is worth mentioning that this navigation bar is a Fragment

Answer 1

Try:

((Nome da Sua Activity)getActivity()).drawGraph();