1

simply my task is to give a shared data to the variable "type" , please help me out

*this sample code is main.dart and i used shared preferences for data transfer and the key for type is "typeOfUser" , I saw so many blogs and even stackoverflow, Questions but none of them suited for me *

code follows :

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:nativestore/database/datatrans.dart';
import 'package:nativestore/homepage.dart';
import 'package:nativestore/loginout/loginpage.dart';
import 'package:nativestore/shophomepage.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'loginout/auth.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: routePage(),
    );
  }
}

class routePage extends StatefulWidget {
  @override
  routePageState createState() => routePageState();
}

class routePageState extends State<routePage> {
  final AuthService _auth = AuthService();
  int type;
  bool isLoggedin = false;
  getIntValuesSF() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    int val = prefs.getInt('typeOfUser');
    return val;
  }

  @override
  void initState() {
    super.initState();
    print("type-->${getIntValuesSF()}");
    print("Init state");
    _auth.autoLogin().then((value) {
      if (value == 'null') {
        print(isLoggedin);
        setState(() {
          isLoggedin = false;
        });
      } else if (value != null) {
        setState(() {
          isLoggedin = true;
        });
      } else {
        setState(() {
          isLoggedin = false;
        });
      }
    });
  }

  // var Utype = GetUserType(type:"ko")
  @override
  Widget build(BuildContext context) {
    return isLoggedin == true
        ? (type == 2)
            ? homePage()
            : ShopHomePage()
        : loginPage();
  }
}

output :

Performing hot restart...
Syncing files to device Redmi Note 8...
Restarted application in 2,645ms.
I/flutter (14262): type-->Instance of 'Future<dynamic>'
I/flutter (14262): Init state

so please help me. Thanks in Advance...

krish cyber
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  • You have marked `getIntValuesSF` as `async` which means it must return a `Future`. – julemand101 Apr 23 '21 at 10:38
  • Does this answer your question? [Is there a way to load async data on InitState method?](https://stackoverflow.com/questions/51901002/is-there-a-way-to-load-async-data-on-initstate-method) – Patrick O'Hara Apr 23 '21 at 10:39
  • yeah , but idk how to print that `getIntValuesSf` , can you please help with code. and my main intention is to store the shared data in `int type`. so if your answer is to store means it will help me a lot. – krish cyber Apr 23 '21 at 10:43

2 Answers2

4

The reason why your code prints Instance of 'Future<dynamic>' is because the instance of getIntValuesSF() is being printed and not the value it returns. What you can do here is to run the async function and using then to fetch its return value when the future completes.

void initState() {
    super.initState();
    getIntValuesSF().then((value) {
        debugPrint('type-->$value');
        // do functions requiring value parameter
    });
}
Omatt
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  • 144
0

change it:

print("type-->${getIntValuesSF()}");

to:

var value = await getIntValuesSF();
print("type-->${value.toString()}");
Qasim
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  • 7