mPager.setOnPageChangeListener(new SimpleOnPageChangeListener() {
    @Override
    public void onPageSelected(int position) {
        final MyFragment fragment = mAdapter.getFragment(position);
        fragment.myMethod();
    }
}

ActionBar.TabListener tabListener = new ActionBar.TabListener() {

                @Override
                public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
                }

                @Override
                public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
                    viewPager.setCurrentItem(tab.getPosition());
                    mContent.setUserVisibleHint(false);
                    mContent.onPause();
                    mContent = mAdapter.getItem(tab.getPosition());
                    mContent.setUserVisibleHint(true);
                    mContent.onResume();
                }

                @Override
                public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
                }
            };

@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if(isVisibleToUser) {
    refresh();
} else {

    }
}