Android ActionBar pattern - multiple activities or fragments

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http://stackoverflow.com – There are few similar questions on stackoverlow, but I haven't find clear explanation at any of the answers how to implement Action Bar pattern for more complex/multiple activities apps. As I understand, there are two options to do this: 1.) implement multiple activities and in each of them implement/include action bar --> problem with this is that when ever you lunch new activity, although it has the same looking action bar, it has that transition, and jumps through the screen, so it's obvious it's a new "window",new separate screen, and it kills that feeling of single app navigation frame (HowTos)