I am very new to Flutter, and stuck at the following problem:

My function to get a list of books using googleapis:

    Future cercaLibri(String ricerca) async {
        final String dominio = 'www.googleapis.com';
        final String percorso = '/books/v1/volumes';
        Map<String, dynamic> parametri = {'q': ricerca};
    
        final Uri url = Uri.https(dominio, percorso, parametri);
        print('hello');
        http.get(url).then((res) {
          final resJson = json.decode(res.body);
          final libriMap = resJson['items'];
    
          libri = libriMap.map<Libro>((value) => Libro.fromMap(value)).toList();
    
          setState(() {
            libri = libri;
    
            risultato = res.body;
          });
        });
        setState(() {
          risultato = "Caricamento in corso";
        });
      }

for all files see stackblitz

In pubspec.yaml I have

http: ^0.13.4

It seems to me that the get method is not being called, or maybe the call is pending

Sorry the code isn't in English

CodePudding user response：

try adding "http" or "https" to dominio, like:

final String dominio = "http://www.googleapis.com"

or

final String dominio = "https://www.googleapis.com"

CodePudding user response：

I solved the problem call effect it works but it fails 'immagineCopertina' which sometimes returns null I added a control in Image.newtork by putting a dummy url if 'immagineCopertina' is null