flutterEmpty/lib/screens/splash_screen.dart

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter_svg/svg.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../components/background.dart';
import '../constants.dart';


class SplashScreen extends StatefulWidget {
  @override
  _SplashScreenState createState() => _SplashScreenState();
}

class _SplashScreenState extends State<SplashScreen> {

  Future<Timer> checkLoad() async {

    final SharedPreferences prefs = await SharedPreferences.getInstance();

    kEmptySocial = (prefs.getString('emptySocial') ?? null );

    if( kEmptySocial != null ){

      kEmptySocial = (prefs.getString('emptySocial') ?? null );
      kEmptyAccessToken = (prefs.getString('emptyAccessToken') ?? null );
      kEmptyId = (prefs.getString('emptyId') ?? null );
      kEmptyName = (prefs.getString('emptyName') ?? null );
      kEmptyEmail = (prefs.getString('emptyEmail') ?? null );
      kEmptyImage = (prefs.getString('emptyImage') ?? null );
    }

    Navigator.pushNamedAndRemoveUntil(context, '/main', ModalRoute.withName('/main'));
    // Navigator.pushNamedAndRemoveUntil(context, '/login', ModalRoute.withName('/login'));
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    new Future.delayed(const Duration(seconds: 1), () {
      checkLoad();
    });

  }

  @override
  Widget build(BuildContext context) {

    Size size = MediaQuery.of(context).size;

    return Background(
      image: Container(
        height: size.height,
        width: size.width,
        decoration: BoxDecoration(
            image: DecorationImage(
                image: AssetImage('assets/images/splash_bg.png'),
                fit: BoxFit.cover
            )
        ),
      ),
      child: Scaffold(
        backgroundColor: Colors.transparent,
        body: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            SvgPicture.asset(
              "assets/images/logo.svg",
              height: size.height * 0.4,
            ),
            SizedBox(height: size.height * 0.1),
            Center(child: CircularProgressIndicator()),
            SizedBox(height: size.height * 0.03),
            Text('Loading...',style: Theme.of(context).textTheme.bodyText1,),
          ],
        ),
      ),
    );
  }
}