title: ListView pass data to another ListView
body: <p>I have two activities with List View's:</p>
  
  <p>Activity A --> ListView person</p>
  
  <p>Activity B --> ListView favouritePerson</p>
  
  <p>In person ListView there is a button i every item of the list</p>
  
  <p>person --> Button likeButton</p>
  
  <p>I would like to add person to favouritePerson list when the like button is clicked. I was trying to achieve this by adding data to singleton and then trying to get it from there, but without success. I have also tried to use SharedPreferences, but could not get it right either. What would be the best approach for this workflow?</p>
  
  <p>I also forget to mention, that I'm populating the first listView by querying the Realm database.</p>