title: How to prevent activity to reload on back action
body: <p>I have app that connects to internet to get data. I can access data multi-level. </p>
  
  <p>So let say I start at level 3 and on level 4 I decide to go back, whenever I press back the previous activity reloads the data from the internet.</p>
  
  <p>Is there any possibility to prevent that?</p>
  
  <p>I have tried to run the activity in single-top mode.</p>