android tabs - starting a new activity

Question

There are 4 Tabs in a TabHost, let them be A, B, C, and D. Now each one is just an index page and clicking on any of them shows a different activity.

The problem is

Answer 1

Can't you change the contentView of your tab instead of starting a new Activity ?

Maybe I'm wrong but I think also that starting an activity in a tab isn't possible because the TabView is hosted in a activity and not the opposite (Tabview don't host an activity per Tab).