I’m pretty new to using the REST API to get data and display it in a listview in Flutter.

API initializing 

 var productapi = new ProductAPI();
  @override
  void initState() {
    super.initState();
    productapi.gettripbooks().then((usersFromServer) {
      setState(() {
        users = usersFromServer;
        print(users);
        print('this is filter gettripbooks data');
           print(widget.data);
        var myfilteroperator =
            users.where((c) => c.customer_email == widget.data).toList();
        filteredUsers = myfilteroperator;
          print(filteredUsers);
      });
    });
  }

I created a list, filled that with dynamic data. Now I want all the data existing in listview

      child: Container(
        height: displayHeight(context) * 0.22,
        padding: const EdgeInsets.all(0),
        child: Column(
          children: [
            Expanded(
              child: ListView.builder(
                itemCount:
                filteredUsers.length > 95 ? 95 : filteredUsers.length,
                itemBuilder: (BuildContext context, int index) {
                  print('start date ');
                  print(filteredUsers[index].operator_emailid);
                  return filteredUsers[index].operator_emailid != null
                      ? InkWell(
                          child: Card(
                            child: Padding(
                              padding: const EdgeInsets.all(0.0),
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                children: <Widget>[
                                  ClipRRect(
                                    borderRadius: BorderRadius.circular(20),
                                    child: SingleChildScrollView(
                                      child: Image(
                                        image: NetworkImage(
                                          filteredUsers[index].poster != null
                                              ?    'https://www.holidaylandmark.com/storage/' +
                                                  filteredUsers[index].poster
                                              : "Not Found",
                                        ),
                                      ),
                                    ),
                                  ),
                                  Text(
                                    filteredUsers[index].TripHeading,
                                    textAlign: TextAlign.left,
                                    style: TextStyle(
                                      fontSize: displayWidth(context) * 0.042,
                                      fontFamily: "Roboto",
                                      fontWeight: FontWeight.w500,
                                    ),
                                  ),
                                 
                                  Text(
                                    'Customer-Email:' +
                                        filteredUsers[index].customer_email,
                                    textAlign: TextAlign.left,
                                    style: TextStyle(
                                        fontSize: displayWidth(context) * 0.036,
                                        fontFamily: "Roboto",
                                        fontWeight: FontWeight.w500),
                                  ),

                                ],
                              ),
                            ),
                          ),

                        )
                      : Center();
                },
              ),
            ),
          ],
        ),
      ),

Output: