// create tile view as the user is going to see it, attach any onClick callbacks etc. 
Widget _createTile(String item, Animation<double> animation) {    
 return SizeTransition(      
    axis: Axis.vertical,      
    sizeFactor: animation,      
    child: const Text(item),    
  ); 
}

// what is going to be shown as the tile is being removed, usually same as above but without any 
// onClick callbacks as, most likely, you don't want the user to interact with a removed view 
Widget _createRemovedTile(String item, Animation<double> animation) {    
 return SizeTransition(      
    axis: Axis.vertical,      
    sizeFactor: animation,      
    child: const Text(item),    
  ); 
}

final Stream<List<String>> list = // get list from some source, like BLOC  
final animatedView = AnimatedStreamList<String>(      
  streamList: list,      
  itemBuilder: (String item, int index, BuildContext context, Animation<double> animation) =>      
    _createTile(item, animation),      
  itemRemovedBuilder: (String item, int index, BuildContext context, Animation<double> animation) =>  
    _createRemovedTile(item, animation), 
  ); 
} 

dependencies:
  animated_stream_list: ^0.0.4

import 'package:animated_stream_list/animated_stream_list.dart';

@required Stream<List<E>> streamList;  

@required AnimatedStreamListItemBuilder<E> itemBuilder; 
@required AnimatedStreamListItemBuilder<E> itemRemovedBuilder; 

typedef Widget AnimatedStreamListItemBuilder<T>(
  T item,
  int index,
  BuildContext context,
  Animation<double> animation,
); 

List<E> initialList;

Equalizer equals; 

typedef bool Equalizer(dynamic item1, dynamic item2); 

Axis scrollDirection; 

bool reverse; 

ScrollController scrollController; 

bool primary; 

ScrollPhysics scrollPhysics; 

bool shrinkWrap; 

EdgeInsetsGeometry padding;