ViewPager에서 Fragment의 함수 호출 방법

private Fragment findFragmentByPosition(int position) {
	return getSupportFragmentManager().findFragmentByTag(
			"android:switcher:" + viewPager.getId() + ":"
					+ pagerAdapter.getItemId(position));
}

private void callFragmentMethod(int position){
	((YourFragment)findFragmentByPosition(position)).yourMethod();
}