Android Tabs Layout

I have an Tab Activity with 4 tabs. Each of tab is showing me the list view. Suppose i m on 4th tab and dragged the list view to the last position and after that i click on 3rd tab and again when i go to 4th tab it is not开发者_StackOverflow社区 refreshing and showing me the last visible screen. Actually i want to show the list view again from 1st element.

is tabs refresh automatically or we need to do it programmatic??

pls help me..

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adapter.notifyDataSetChanged()