Answers for "how to get item count from a listview in flutter"

flutter listview builder

List<String> litems = ["1","2","Third","4"];
body: new ListView.builder
  (
    itemCount: litems.length,
    itemBuilder: (BuildContext ctxt, int index) {
     return new Text(litems[index]);
    }
  )

flutter count list

var comments = <Comment>[...];
var count = comments.where((c) => c.product_id == someProductId).toList().length;