null safety added to the project

lib/dashboard.dart

@@ -12,7 +12,7 @@ class Dashboard extends StatefulWidget {
 }
 
 class _DashboardState extends State<Dashboard> {
-  PageController _pageController;
+  PageController _pageController = PageController();
   int _currentIndex = 0;
 
   @override

lib/helpers/slide_route.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
 class SlideRightRoute extends PageRouteBuilder<SlideRightRoute> {
-  SlideRightRoute({this.page})
+  SlideRightRoute({required this.page})
       : super(
           pageBuilder: (
             BuildContext context,
@@ -26,8 +26,8 @@ class SlideRightRoute extends PageRouteBuilder<SlideRightRoute> {
   final Widget page;
 }
 
-class SlideLeftRoute extends PageRouteBuilder<SlideLeftRoute> {
-  SlideLeftRoute({this.page})
+class SlideLeftRoute extends PageRouteBuilder<Widget> {
+  SlideLeftRoute({required this.page})
       : super(
           pageBuilder: (
             BuildContext context,
@@ -52,8 +52,8 @@ class SlideLeftRoute extends PageRouteBuilder<SlideLeftRoute> {
   final Widget page;
 }
 
-class SlideTopRoute extends PageRouteBuilder<SlideTopRoute> {
-  SlideTopRoute({this.page})
+class SlideTopRoute extends PageRouteBuilder<Widget> {
+  SlideTopRoute({required this.page})
       : super(
           pageBuilder: (
             BuildContext context,
@@ -78,8 +78,8 @@ class SlideTopRoute extends PageRouteBuilder<SlideTopRoute> {
   final Widget page;
 }
 
-class SlideBottomRoute extends PageRouteBuilder<SlideBottomRoute> {
-  SlideBottomRoute({this.page})
+class SlideBottomRoute extends PageRouteBuilder<Widget> {
+  SlideBottomRoute({required this.page})
       : super(
           pageBuilder: (
             BuildContext context,

lib/views/cart.dart

@@ -6,7 +6,7 @@ import 'package:retro_shopping/widgets/retro_button.dart';
 
 class Cart extends StatefulWidget {
   const Cart({
-    Key key,
+    Key? key,
   }) : super(key: key);
 
   @override

lib/views/home.dart

@@ -7,7 +7,7 @@ class Home extends StatelessWidget {
   final GlobalKey<ScaffoldState> _drawerKey = GlobalKey();
 
   void _openDrawer() {
-    _drawerKey.currentState.openDrawer();
+    _drawerKey.currentState!.openDrawer();
   }
 
   @override
@@ -38,22 +38,22 @@ class Home extends StatelessWidget {
                           onTap: () {
                             _openDrawer();
                           },
-                          child: RetroButton(
+                          child: const RetroButton(
                             upperColor: Colors.white,
                             lowerColor: Colors.black,
                             width: 35,
                             height: 35,
                             borderColor: Colors.white,
-                            child: const Icon(Icons.menu),
+                            child: Icon(Icons.menu),
                           ),
                         ),
-                        RetroButton(
+                        const RetroButton(
                           upperColor: Colors.white,
                           lowerColor: Colors.black,
                           width: 35,
                           height: 35,
                           borderColor: Colors.white,
-                          child: const Padding(
+                          child: Padding(
                             padding: EdgeInsets.only(top: 7, left: 6),
                             child: Icon(
                               RelicIcons.cart,
@@ -213,7 +213,7 @@ class Home extends StatelessWidget {
 
 class DrawerWidget extends StatelessWidget {
   const DrawerWidget({
-    Key key,
+    Key? key,
   }) : super(key: key);
 
   @override
@@ -250,7 +250,7 @@ class DrawerWidget extends StatelessWidget {
 }
 
 Widget _createDrawerItem(
-    {IconData icon, String title, GestureTapCallback onTap}) {
+    {required String title, IconData? icon, GestureTapCallback? onTap}) {
   return ListTile(
     title: Row(
       children: <Widget>[

lib/views/profile.dart

@@ -37,7 +37,7 @@ class ProfilePage extends StatelessWidget {
 
 class WishlistSection extends StatelessWidget {
   const WishlistSection({
-    Key key,
+    Key? key,
   }) : super(key: key);
 
   @override
@@ -105,7 +105,7 @@ class WishlistSection extends StatelessWidget {
 
 class OrdersSection extends StatelessWidget {
   const OrdersSection({
-    Key key,
+    Key? key,
   }) : super(key: key);
 
   @override
@@ -198,7 +198,7 @@ class OrdersSection extends StatelessWidget {
 
 class TopSection extends StatelessWidget {
   const TopSection({
-    Key key,
+    Key? key,
   }) : super(key: key);
 
   @override

lib/widgets/bottom_nav_bar.dart

@@ -13,7 +13,7 @@ class FloatingNavBar extends StatefulWidget {
 }
 
 class _FloatingNavBarState extends State<FloatingNavBar> {
-  PageController controller;
+  late PageController controller;
 
   @override
   void initState() {

lib/widgets/payment/cart_item.dart

@@ -6,7 +6,7 @@ class CartItem extends StatefulWidget {
 }
 
 class _CartItemState extends State<CartItem> {
-  TextEditingController controller;
+  TextEditingController controller = TextEditingController();
 
   @override
   void initState() {

lib/widgets/payment/order_item.dart

@@ -3,10 +3,10 @@ import 'package:retro_shopping/helpers/constants.dart';
 
 class OrderItem extends StatelessWidget {
   const OrderItem(
-      {this.title,
-      this.image,
-      this.ordered,
-      this.status,
+      {required this.title,
+      required this.image,
+      required this.ordered,
+      required this.status,
       this.delivered = false});
   final String title;
   final String image;

lib/widgets/payment/payment_successful.dart

@@ -4,7 +4,7 @@ import 'package:retro_shopping/helpers/constants.dart';
 
 class PaymentSuccessful extends StatelessWidget {
   const PaymentSuccessful({
-    Key key,
+    Key? key,
   }) : super(key: key);
   @override
   Widget build(BuildContext context) {

lib/widgets/payment/payment_window.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:retro_shopping/helpers/constants.dart';
 import 'package:retro_shopping/widgets/payment/payment_successful.dart';
 import 'package:retro_shopping/widgets/retro_button.dart';
+// ignore: import_of_legacy_library_into_null_safe
 import 'package:razorpay_flutter/razorpay_flutter.dart';
 import 'package:fluttertoast/fluttertoast.dart';
 
@@ -11,7 +12,7 @@ class PaymentWindow extends StatefulWidget {
 }
 
 class _PaymentWindowState extends State<PaymentWindow> {
-  int cnt1, cnt2;
+  int? cnt1, cnt2;
   final Razorpay _razorpay = Razorpay();
   @override
   void initState() {
@@ -42,7 +43,8 @@ class _PaymentWindowState extends State<PaymentWindow> {
     try {
       _razorpay.open(options);
     } catch (e) {
-      debugPrint(e.toString());
+      // ignore: avoid_print
+      print(e);
     }
   }
 
@@ -122,7 +124,7 @@ class _PaymentWindowState extends State<PaymentWindow> {
                         GestureDetector(
                           onTap: () {
                             setState(() {
-                              cnt2 = cnt2 + 1;
+                              cnt2 = cnt2! + 1;
                               cnt1 = 0;
                             });
                             if (cnt2 == 2) {
@@ -199,7 +201,7 @@ class _PaymentWindowState extends State<PaymentWindow> {
                         GestureDetector(
                           onTap: () {
                             setState(() {
-                              cnt1 = cnt1 + 1;
+                              cnt1 = cnt1! + 1;
                               cnt2 = 0;
                             });
                             if (cnt1 == 2) {

lib/widgets/product/product_card.dart

@@ -5,14 +5,12 @@ import 'package:retro_shopping/widgets/product/product_page.dart';
 
 class ProductCard extends StatelessWidget {
   const ProductCard(
-      {Key key,
-      this.text,
-      this.owner,
-      this.amount,
-      this.image,
-      this.seller,
-      this.height})
-      : super(key: key);
+      {required this.text,
+      required this.owner,
+      required this.amount,
+      required this.image,
+      required this.seller,
+      required this.height});
   final String text;
   final String owner;
   final String amount;

lib/widgets/product/product_page.dart

@@ -7,12 +7,12 @@ import '../retro_button.dart';
 // ignore: must_be_immutable
 class ProductPage extends StatefulWidget {
   ProductPage(
-      {this.text,
-      this.prodHeight,
-      this.seller,
-      this.owner,
-      this.amount,
-      this.image});
+      {required this.text,
+      required this.prodHeight,
+      required this.seller,
+      required this.owner,
+      required this.amount,
+      required this.image});
   String text;
   String image;
   String owner;
@@ -63,13 +63,13 @@ class _ProductPageState extends State<ProductPage> {
                             child: const Icon(Icons.arrow_back),
                           ),
                         ),
-                        RetroButton(
+                        const RetroButton(
                           upperColor: Colors.white,
                           lowerColor: Colors.black,
                           width: 35,
                           height: 35,
                           borderColor: Colors.white,
-                          child: const Padding(
+                          child: Padding(
                             padding: EdgeInsets.only(top: 7, left: 6),
                             child: Icon(
                               RelicIcons.cart,

lib/widgets/retro_button.dart

@@ -1,20 +1,20 @@
 import 'package:flutter/material.dart';
 
-// ignore: must_be_immutable
 class RetroButton extends StatefulWidget {
-  RetroButton(
-      {this.child,
-      this.upperColor,
-      this.lowerColor,
-      this.width,
-      this.height,
-      this.borderColor});
-  Widget child;
-  Color upperColor;
-  Color lowerColor;
-  double width;
-  double height;
-  Color borderColor;
+  const RetroButton(
+      {required this.child,
+      required this.upperColor,
+      required this.lowerColor,
+      required this.width,
+      required this.height,
+      required this.borderColor});
+  final Widget child;
+  final Color upperColor;
+  final Color lowerColor;
+  final double width;
+  final double height;
+  final Color borderColor;
+
   @override
   _RetroButtonState createState() => _RetroButtonState();
 }

pubspec.yaml

@@ -18,23 +18,25 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  adobe_xd: ^1.1.0+1
-  cupertino_icons: ^0.1.3
-  fluttertoast: ^7.1.8
+  google_fonts: ^2.0.0
+  fluttertoast: ^8.0.1-nullsafety.0
+  cupertino_icons: ^1.0.2
   firebase_core: ^1.0.0
-  google_fonts: ^1.1.0
-  razorpay_flutter: 1.1.0
 
+  adobe_xd: ^1.1.0+1
+
 
-dependency_overrides: 
+  razorpay_flutter: ^1.1.0
+
+dependency_overrides:
   flutter_svg: ^0.20.0-nullsafety.3
 
 dev_dependencies: