Future getData() async {
    var response = await http.get(
        Uri.encodeFull('https://jsonplaceholder.typicode.com/posts'),
        headers: {});

    print(response.body);

    listOfNames = JSON.jsonDecode(response.body);
    setState(() {
      coinItems.addAll(_incrementCounter());
    });

    return data;
  }

  @override
  void initState() {
    getData();
  }
List<CoinItem> _incrementCounter() {
    List<CoinItem> coinItems = new List<CoinItem>();

    for (int i = 0; i < 5; i++) {
      print(listOfNames[i]["title"]);

      coinItems.add(
        new CoinItem(
          coinName: listOfNames[i]['title'],
        ),
      );
    }

    return coinItems;
  }

.
.
.
..
.
TabBarView(
            children: [
              ListView(
                children: coinItems,
              ),
              Icon(Icons.directions_transit),
              Icon(Icons.directions_bike),
            ],
          )