title: Tabs in Android UI: Are tabs just to toggle display of different contents, or can we perform long operations on the click of tab header?
body: <p>The idea I have of tabs is that they are used semantically to display different contents on the same part of the screen.</p>
  
  <p>Now I think it implies that all the data that needs to be displayed should be there, and only a  display of that tab's contents should take place when the user clicks a tab-header.</p>
  
  <p>From <a href="http://developer.android.com/design/building-blocks/tabs.html" rel="nofollow">Android Design guide</a>, </p>
  
  <blockquote>
    <p>Fixed tabs display all items concurrently.</p>
  </blockquote>
  
  <p>If I am understanding this correctly (I am assuming concurrently means sharing the same itme), all items should be there, and the user clicking the tab headers should just toggle the display.</p>
  
  <p><strong>But does it make sense to do an internet search, and make a web service call etc., on the click of a tab-header, so that the response from the web-service etc. is displayed in the tab?</strong></p>