ListView is not showing the result if empty list - flutter

Question

I am loading data from a remote api:
This is the dart file that provides the connection and download:
clinica-api.dart
import 'package:flutter_capenergy/modelos/clinica.dart';
import 'package:http/http.dart' as http;
Future<List<Clinica>> fetchClinicas(String idUsuario) async {
String url ="https://..flutter_api/get_clinicas.php";
final response = await http.get(url);
if (response.body == "[]"){
}
return clinicaFromJson(response.body);
}
And this is the piece of code from misclinicas.dart where I am showing the list:
Expanded(
child: Container(
child: FutureBuilder(
future: fetchClinicas(miId),
builder: (context, snapshot) {
if (snapshot.hasData) {
return ListView.builder(
itemCount: snapshot.data.length,
shrinkWrap: true,
itemBuilder: (BuildContext context, index) {
print(index.toString());
Clinica clinica = snapshot.data[index];
return new GestureDetector(
onTap: () {
clinicaProvider.setClinica(clinica.nombreClinica);
clinicaProvider.setClinicaId(clinica.idClinica);
} ,
child: new Card(
elevation: 6,
child: new Column(
children: [
new Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment
.start,
children: [
Row(
crossAxisAlignment: CrossAxisAlignment
.center,
mainAxisAlignment: MainAxisAlignment
.center,
children: <Widget>[
Image.network(
'https://.../${clinica
.logoClinica}',
height: 180,
alignment: Alignment.center,),
],
),
Text(
'${clinica.nombreClinica}',
style: TextStyle(fontSize: 16,
fontWeight: FontWeight.bold,
color: Colors.blue),
),
Text(
'${clinica.direccionClinica}',
style: TextStyle(fontSize: 14,
color: Colors.grey,
fontStyle: FontStyle.italic),
),
],
),
),
],
),
),
);
},
);
}
else {
Text ("NO HAY CLINICAS");
}
return Text("Cargando clínicas");
},
),
),
),
If there are items on the list, they are shown, but if the list is empty I would like to show a text with a message reporting that the list is empty.
I am trying to do it putting this text widget if snapshot.hasdata is false:
Text ("NO HAY CLINICAS");
but it is not shown, I am only getting a blank listView.

Answer 1

In the empty list case, snapshot.hasData will be true and snapshot.data.length will be 0.
snapshot.hasData == false means it's either loading or an error has happened.

Answer 2

in the api call return empty list if response.body ="[]"
if (response.body == "[]"){
List<Clinica> emptyClinica = [];
return emptyClinica;
}
in misclinicas.dart
snapshot.data.lenth > 0 ? your list work : Text('No Data Found')