title: long press event on listview items in xamarin forms
body: <p>I need to implemnet long press event on listview item and need to open a custom popup with listview item details. I tried long press with Behaviour on Listview, But in this case I am not able to get the item on which user is implementing the long press. I guess because I am calling it from listview not from the listview cell. So I tried to implement it  with listview cells also, but in that case long press command is not executing. If I do it on any control outside the listview, then this long press command exuctes but from listview cell it is not executing the long press command.</p>
  <p>Is there any way to excute long press command from listview cells?</p>