Flutter how to create package with function

Question

I'm trying to make a package. I need to use async function, but I can't use it while building package.

Package Code:

class Sozluk {
  wiki(ceviri) async {
    var res = await http.Client()
          .get(Uri.parse('https://sozluk.gov.tr/gts?ara=$ceviri'));
      var body = res.body;
      var decoded = jsonDecode(body);
      var json = decoded[0];
      var sozlukanlam = json["anlamlarListe"][0]["anlam"];
      print(sozlukanlam);
      return sozlukanlam;
  }
}

Test Code:

void main() {
  test('köpek', () {
    final sozluk = Sozluk();
    var cevap = sozluk.wiki('köpek');
    print(cevap);
  });
}

The print I got:

Instance of 'Future<dynamic>'

score 0 · Answer 1 · answered Feb 18 '22 at 10:34

Yout question is unclear.

If you need to print

sozlukanlam

var in test function you need to await your wiki function becaus it is async.

So you could do somthing like that:

void main() {
  test('köpek', () async {
    final sozluk = Sozluk();
    var cevap = await sozluk.wiki('köpek');
    print(cevap);
  });
}

OR, if test function couldn't bee async

void main() {
  test('köpek', () {
    final sozluk = Sozluk();
    sozluk.wiki('köpek').then((sozlukanlam)=>print(cevap));
  });
}

score 0 · Accepted Answer · edited Mar 09 '23 at 14:57

You code is missing a lot of pieces. Dart is strongly typed, that is an advantage, please use it.

Problems:

ceviri has no explicit type.
wiki has no explicit return type.
wiki is not awaited
Your anonymous method is not async.

More information about Futures, async and await: What is a Future and how do I use it?

Fixing your code as good as possible:

class Sozluk {
  Future<TYPE_X> wiki(TYPE_Y ceviri) async {
    var res = await http.Client()
          .get(Uri.parse('https://sozluk.gov.tr/gts?ara=$ceviri'));
      var body = res.body;
      var decoded = jsonDecode(body);
      var json = decoded[0];
      var sozlukanlam = json["anlamlarListe"][0]["anlam"];
      print(sozlukanlam);
      return sozlukanlam;
  }
}

Test Code:

void main() {
  test('köpek', () async {
    final sozluk = Sozluk();
    var cevap = await sozluk.wiki('köpek');
    print(cevap);
  });
}

Please note that you need to fill in TYPE_X and TYPE_Y, I have no idea which datatypes best represent your data. Is it a number? A text? You decide.

Flutter how to create package with function

2 Answers2