I am getting this error after using JSON data into text wigdet.
My json is stored locally in

> 
> assets/json/data.json
> 
> 
> 

I am building a Listview using ListView.builder

My code

```
 Widget build(BuildContext context) {
  return Scaffold(
    backgroundColor: Color(0xff655ee6),
    appBar: AppBar(
      backgroundColor: Color(0xff655ee6),
      title: Text("Apply Online"),
    ),
    body: SingleChildScrollView(
      child: SizedBox(
        height: MediaQuery.of(context).size.height,
        child: FutureBuilder(
          future: DefaultAssetBundle.of(context).loadString("assets/json/example.json"),
          builder: (context,snapshot){
            var mydata = json.decode(snapshot.data.toString());
            if(mydata == null){
              return Center(
                child: CircularProgressIndicator(
                ),
              );
            }
            else {return ListView.builder(
              itemCount: 30,
              itemBuilder: (context, index){
                return Card(
                  child: ListTile(
                    title: Text(mydata["saarthiService"]['applyOnline']["0"]),
                    leading: Icon(Icons.import_contacts),

                  ),
                );
              },
            );}
          },
        ),
      ),
    ),
    );
 }
} 

```

Please Help Me and I am new to flutter
Thanks