title: How to avoid data reload on android device back button
body: <p>I am using android tab based application with TabGroupActivity, the application have a ListActivity "A" which drills down to a detail activity "D", on detail activity when i click device back button it navigate back to ListActivtiy "A" and relaods the data (ProgressBar shows progress on back button).<br>
  How can i avoid reloading of data on back buttuon ?<br>
  Any help would be appreciated.</p>