Fragment Transaction not working when using AppCompatActivity or FragmentActivity

Question

I have a typical application. An activity which has a FrameLayout and in this layout I want to switch between fragments. This is typically and easily done with:

getFragmentManager().beginTransaction()
                .replace(R.id.ac_container, new FrOverview())
                .addToBackStack(null)
                .commit();

The problem is, that even if I use .addToBackStack(null) (And I know it's been added 'cause the stack count increases) when I press back I exit the application. I have been trying a lot of different code stuff and checked most threads here on Stackoverflow but I can't get it to work with code (method calls etc.).

But! I can get it to work, by changing the extended class of my activity class. If my class extends Activity, it works fine. But if I use AppCompatActivity (which in turn extends FragmentActivity) then it has the bad behaviour as explained earlier.

Feels like this has to be an error on Androids part, I am not doing anything wrong to my knowledge.

Does anyone have any suggestions on how to solve this? i.e. get the back functionality and keep the ActionBar!

Answer 1

AppCompatActivity uses the SupportFragmentManager, you need to switch to SupportFragment and SupportFragmentManager