Up button vs. Back button and fate of CrimeListFragment


Using LogCat, I was surprised to find that CrimeListFragment is destroyed and recreated on navigating up from CrimeFragment but resumed (as expected) when navigating back. Why then is the use of the up button so desirable? Why do we not mimic the back button functionality instead, merely reloading the list in onResume() as in listing 10.8?