title: Keep items in list when changing activity android
body: <p>I am developing a sort of calendar app for Android. In my event-list activity i have an <code>ActionBar</code> which shows a drop down list with different date intervals. When i choose a date interval from the dropdown list the list fragment reloads the events from an internet server. Fine so far.</p>
  
  <p>The problem i am having is that when i select an event i go inte the detail activity, and when i return from this detail activity to the list, the list is refreshing itself again. How can i prevent the list fragment from getting the events from the internet again? </p>