ShanmugavelGK

List<CameraDescription> cameras;

Future<Null> main() async {
  cameras = await availableCameras();
  runApp(new MaterialApp(
    debugShowCheckedModeBanner: false,
    theme: new ThemeData(
      brightness: Brightness.light,
      primaryColor: Colors.green,
      secondaryHeaderColor: Colors.green,

ShanmugavelGK

import 'package:shared_preferences/shared_preferences.dart';

class SharedPreference {
  SharedPreferences prefs;

  init() async {
    prefs = await SharedPreferences.getInstance();
  }

  void setStringValue(String key, String value) {