new project SwipeTabs
add FragmentA,B,C & fragment_a,b,c
deal with ActionBar and TabListener
add ViewPager
deal with ViewPager and FragmentPagerAdapter

Notice that ViewPager is not associated with ActionBar(Tab) in this step
viewPager.setOnPageChangeListener
marked log
modify onPageSelected , onTabSelected

onPageSelected => actionBar.setSelectedNavigationItem(arg0);
onTabSelected => viewPager.setCurrentItem(tab.getPosition());