architectural dilemma - nested Fragments or Activities in tabhost

Question

I need to implement such a construction - I have TabHost which contains nested FragmentActivities. I tried to use ActivtityGroup for embedded FragmentActivities, but got an android.view.WindowManager$BadTokenException: Unable to add window -- token android.app.LocalActivityManager$LocalActivityRecord@405ceb00 is not valid; is your activity running?

I'm going to release my application at Gingerbread android version. But I want to implement good version maintaince for application - do not remake whole application for newer versions. But I've built whole application with FragmentActivities. So I've got a dilemma to solve: 1) to save solution with FragmentActivities and make it nested with TabHost; 2) rewrite application and implement Fragments instead of Activities and use only one FragmentActivity; 3) implement ActionBar solution;

I want make it easy with good maintaince. Help please with it

Answer 1

Later, I refactored my application. ActivityGroup is really bad solution. I use FragmentActivities in Tabs and nested Fragments in it. Everything work fine and more more faster than with ActivityGroups.