title: Reload activity each time the TabActivity is visited
body: <p>In android <code>TabActivity</code>. I want to reload a tab each time it is visited. for example, if there is a tab that get data from the database, I want to fetch data each time the tab activity is appeared .</p>
  
  <p>Where I need to put the operations that get data from database, on <code>onCreate</code> function, <code>onResume</code> .. ??</p>