How to Map Flutter JSON Strings from List?

Question

I\'m successfully printing my response as String from my YouTube JSON url, but when I try to serialize through the \"items\" I get the following error Unhandled exception:

Answer 1

I would Love to share this and some expert can also please improve this codes, After alot of hours have battle with it.

Model Class

class Testimony{
    String fullname;
   String testimony;

   Testimony({this.fullname,
     this.testimony}); 

    factory Testimony.fromJson(Map json) => new Testimony(
      fullname: json['fullname'] as String,
       testimony: json['testimony'] as String,  
         );

         }

API CLASS

List ToListandMap (String responseBody) {
 Map data = json.decode(responseBody);
    var videos = data['testimonies']; //returns a List of Maps
  final casting =  videos.cast>();
   return casting.map((json) => Testimony.fromJson(json)).toList();
    }

Future> fetchTestimonies(http.Client client) async {
       final response = await client.get('https://tryjambcbt.com/api/testimonies');

         return ToList(response.body);
         }

MainWidget for UI

FutureBuilder>(
    future: fetchTestimonies(http.Client()),
    builder: (context, snapshot) {
      if (snapshot.hasError) print(snapshot.error);
      return snapshot.hasData
          ? TestimonyList(testimony: snapshot.data)
          : Center(child: CircularProgressIndicator());
    },
  ),

Widget

class TestimonyList extends StatelessWidget {
final List testimony;

TestimonyList({Key key, this.testimony}) : super(key: key);

  @override
 Widget build(BuildContext context) {
  return ListView.builder(
    physics: BouncingScrollPhysics(),
    padding: EdgeInsets.only(bottom: 10),
    shrinkWrap: true,
    scrollDirection: Axis.vertical,
    itemCount: testimony.length,
    itemBuilder: (context, index) {
    return Padding(
      padding: EdgeInsets.only(right: 10),
      child: Text(testimony[index].testimony)
       );
      },
    );
   }
  }