Actionbar tabs with multi-pane view in android

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http://stackoverflow.com – I am newbie with fragments and actionbar in android. I want to develop application for tablets which has multiple tabs, each tab has Listview in the leftside and the details of the item on the right side Here is an example of what i want to do. I don't know which of this is activity and which is a fragment and how to navigate using this tabs and change the content of the listview and the details. I want examples to navigate using tabs with multipane layout because I searched about that and I found tabs are using fragments and multipane is composed of two fragments and nested fragments not a (HowTos)