Scroll Controller not firing inside List View builder - flutter

Question

I am using a ScrollController in the ListView.builder widget.
But when I try to print something after reaching end of the screen it doesn't seem to work.
My main goal id to use it for pagination.
class RestaurantList extends StatefulWidget {
#override
_RestaurantListState createState() => _RestaurantListState();
}
class _RestaurantListState extends State<RestaurantList> {
ScrollController _controller;
void _scrollListener() {
if (_controller.offset >= _controller.position.maxScrollExtent &&
!_controller.position.outOfRange) {
print('new rests');
}
}
#override
void initState() {
_controller = ScrollController();
_controller.addListener(_scrollListener);
super.initState();
}
#override
Widget build(BuildContext context) {
// print('restaurant list');
return FutureBuilder<List<Restaurant>>(
future: Provider.of<Restaurants>(context, listen: false)
.fetchAndSetRestaurants(),
builder: (context, snapshot) {
// Items are not available and you need to handle this situation, simple solution is to show a progress indicator
if (!snapshot.hasData) {
//Navigator.of(context).pushNamed('loading');
return Center(child: LoadingList());
}
final List<Restaurant> restaurants = snapshot.data;
print('List: ${restaurants[0].name}');
return ListView.builder(
controller: _controller,
physics: ScrollPhysics(),
scrollDirection: Axis.vertical,
shrinkWrap: true,
itemBuilder: (ctx, i) =>
restaurants[i].isAvailable || restaurants[i].totalQuantity != 0
? Column(
children: [
ChangeNotifierProvider.value(
value: restaurants[i], child: RestaurantInfo()),
Container(
height: 10,
)
],
)
: Container(),
itemCount: restaurants.length,
);
},
);
}
}

Answer 1

Try changing like below when checking reaching end of screen.
void _scrollListener() {
if (_controller.position.atEdge) {
if (_controller.position.pixels == 0) {
// Reaching Top
} else {
// Reaching end of screen
}
}
}