How to set actionbar title to a fragment?

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http://stackoverflow.com – I made this ActionBar with navigation tabs. I used this tutorial of android http://developer.android.com/guide/topics/ui/actionbar.html#Tabs but whenever I use the tabs there is no name at the top of my actionbar. When I am creating an activity I simply set a label for it. android:label="@string/title" But I can't edit fragments inside the manifest file. How can I set unique labels for them? Edit: I am developing for api level lower than 11 (HowTos)