flutter ListView KeepAlive after some scroll

Question

I want to keepAlive my widgets which are already rendered in ListView. I was tried with addAutomaticKeepAlives:true properties which p

Answer 1

As stated by AutomaticKeepAliveClientMixin and Remi's answer,

Subclasses must implement wantKeepAlive, and their build methods must call super.build (the return value will always return null, and should be ignored).

Therefore, change your build method to:

class Foo extends StatefulWidget {
  @override
  FooState createState() {
    return new FooState();
  }
}

class FooState extends State with AutomaticKeepAliveClientMixin {
  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Container(

    );
  }

  @override
  bool get wantKeepAlive => true;
}