Most bugs are resolved.

lib/core/components/button/normal_button.dart

@@ -8,11 +8,24 @@ class NormalButton extends StatelessWidget {
   const NormalButton({Key key, this.child, this.onPressed}) : super(key: key);
   @override
   Widget build(BuildContext context) {
-    return RaisedButton(
-      padding: EdgeInsets.all(15),
-      elevation: 10,
+    return ElevatedButton(
+      style: ButtonStyle(
+        padding: MaterialStateProperty.all(EdgeInsets.all(15)),
+        elevation: MaterialStateProperty.all(10),
+      ),
       onPressed: onPressed,
       child: child,
     );
   }
 }
+
+
+/*BEFORE: Flutter 2.0
+
+  RaisedButton(
+      padding: EdgeInsets.all(15),
+      elevation: 10,
+      onPressed: onPressed,
+      child: child,
+    );
+ */

lib/core/constants/navigation/navigation_constants.dart

@@ -1,3 +1,3 @@
 class NavigationConstants {
-  static const TEST_VIEW = "/test";
+  static const TEST_VIEW = '/test';
 }

lib/core/init/lang/language_manager.dart

@@ -3,7 +3,7 @@ import 'package:flutter/material.dart';
 class LanguageManager {
   static LanguageManager _instance;
   static LanguageManager get instance {
-    if (_instance == null) _instance = LanguageManager._init();
+    _instance ??= LanguageManager._init();
     return _instance;
   }
 

lib/core/init/navigation/navigation_route.dart

@@ -6,7 +6,7 @@ import '../../components/card/not_found_navigation_widget.dart';
 import '../../constants/navigation/navigation_constants.dart';
 
 class NavigationRoute {
-  static NavigationRoute _instance = NavigationRoute._init();
+  static final NavigationRoute _instance = NavigationRoute._init();
   static NavigationRoute get instance => _instance;
 
   NavigationRoute._init();

lib/core/init/network/network_core/core_operations.dart

@@ -1,4 +1,4 @@
-part of "../core_dio.dart";
+part of '../core_dio.dart';
 
 extension _CoreDioOperations on CoreDio {
   R _responseParser<R, T>(BaseModel model, dynamic data) {

lib/core/init/network/network_manager.dart

@@ -8,15 +8,18 @@ import 'core_dio.dart';
 class NetworkManager {
   static NetworkManager _instance;
   static NetworkManager get instance {
-    if (_instance == null) _instance = NetworkManager._init();
+    _instance ??= NetworkManager._init();
     return _instance;
   }
 
   ICoreDio coreDio;
 
   NetworkManager._init() {
-    final baseOptions =
-        BaseOptions(baseUrl: "https://jsonplaceholder.typicode.com/", headers: {"val": LocaleManager.instance.getStringValue(PreferencesKeys.TOKEN)});
+    final baseOptions = BaseOptions(
+        baseUrl: 'https://jsonplaceholder.typicode.com/',
+        headers: {
+          'val': LocaleManager.instance.getStringValue(PreferencesKeys.TOKEN)
+        });
     // _dio = Dio(baseOptions);
 
     coreDio = CoreDio(baseOptions);

lib/core/init/notifier/provider_list.dart

@@ -7,7 +7,7 @@ import 'theme_notifer.dart';
 class ApplicationProvider {
   static ApplicationProvider _instance;
   static ApplicationProvider get instance {
-    if (_instance == null) _instance = ApplicationProvider._init();
+    _instance ??= ApplicationProvider._init();
     return _instance;
   }
 

lib/core/init/theme/light/color_scheme_light.dart

@@ -3,7 +3,7 @@ import 'package:flutter/material.dart';
 class ColorSchemeLight {
   static ColorSchemeLight _instace;
   static ColorSchemeLight get instance {
-    if (_instace == null) _instace = ColorSchemeLight._init();
+    _instace ??= ColorSchemeLight._init();
     return _instace;
   }
 

lib/core/init/theme/light/text_theme_light.dart

@@ -3,16 +3,22 @@ import 'package:flutter/material.dart';
 class TextThemeLight {
   static TextThemeLight _instace;
   static TextThemeLight get instance {
-    if (_instace == null) _instace = TextThemeLight._init();
+    _instace ??= TextThemeLight._init();
     return _instace;
   }
 
   TextThemeLight._init();
 
-  final TextStyle headline1 = TextStyle(fontSize: 96, fontWeight: FontWeight.w300, letterSpacing: -1.5);
-  final TextStyle headline2 = TextStyle(fontSize: 60, fontWeight: FontWeight.w300, letterSpacing: -0.5);
-  final TextStyle headline3 = TextStyle(fontSize: 48, fontWeight: FontWeight.w400);
-  final TextStyle headline4 = TextStyle(fontSize: 34, fontWeight: FontWeight.w400, letterSpacing: 0.25);
-  final TextStyle headline5 = TextStyle(fontSize: 24, fontWeight: FontWeight.w400);
-  final TextStyle overline = TextStyle(fontSize: 10, fontWeight: FontWeight.w400, letterSpacing: 1.5);
+  final TextStyle headline1 =
+      TextStyle(fontSize: 96, fontWeight: FontWeight.w300, letterSpacing: -1.5);
+  final TextStyle headline2 =
+      TextStyle(fontSize: 60, fontWeight: FontWeight.w300, letterSpacing: -0.5);
+  final TextStyle headline3 =
+      TextStyle(fontSize: 48, fontWeight: FontWeight.w400);
+  final TextStyle headline4 =
+      TextStyle(fontSize: 34, fontWeight: FontWeight.w400, letterSpacing: 0.25);
+  final TextStyle headline5 =
+      TextStyle(fontSize: 24, fontWeight: FontWeight.w400);
+  final TextStyle overline =
+      TextStyle(fontSize: 10, fontWeight: FontWeight.w400, letterSpacing: 1.5);
 }

lib/core/init/theme/panache/red_theme.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 
-const String FONT_FAMILY = "Poppins";
+const String FONT_FAMILY = 'Poppins';
 
 final ThemeData redTheme = ThemeData(
   fontFamily: FONT_FAMILY,
@@ -31,8 +31,11 @@ final ThemeData redTheme = ThemeData(
   textSelectionHandleColor: Color(0xffe57373),
   backgroundColor: Color(0xffef9a9a),
   toggleButtonsTheme: ToggleButtonsThemeData(
-      fillColor: Color(0xffC20003), textStyle: TextStyle(color: Colors.white), selectedColor: Colors.white),
-  floatingActionButtonTheme: FloatingActionButtonThemeData(backgroundColor: Color(0xffC20003)),
+      fillColor: Color(0xffC20003),
+      textStyle: TextStyle(color: Colors.white),
+      selectedColor: Colors.white),
+  floatingActionButtonTheme:
+      FloatingActionButtonThemeData(backgroundColor: Color(0xffC20003)),
 
   dialogBackgroundColor: Color(0xffffffff),
 

lib/product/widget/button/header_button.dart

@@ -8,7 +8,8 @@ class HeaderButton extends StatelessWidget {
   final String titleText;
   final VoidCallback onPressed;
 
-  const HeaderButton({Key key, this.titleText, this.onPressed}) : super(key: key);
+  const HeaderButton({Key key, this.titleText, this.onPressed})
+      : super(key: key);
   @override
   Widget build(BuildContext context) {
     return Padding(
@@ -23,12 +24,35 @@ class HeaderButton extends StatelessWidget {
   Text buildTextTitle(BuildContext context) {
     return Text(
       titleText.tr(),
-      style: context.textTheme.headline6.copyWith(color: context.colorScheme.onError),
+      style: context.textTheme.headline6
+          .copyWith(color: context.colorScheme.onError),
     );
   }
 
-  FlatButton buildFlatButtonRight(BuildContext context) {
-    return FlatButton(
+  TextButton buildFlatButtonRight(BuildContext context) {
+    return TextButton(
+      onPressed: () {
+        onPressed();
+      },
+      child: Wrap(
+        crossAxisAlignment: WrapCrossAlignment.center,
+        children: [
+          Text(LocaleKeys.home_game_viewAll.tr(),
+              style: context.textTheme.subtitle2
+                  .copyWith(color: context.colorScheme.onError)),
+          Icon(Icons.arrow_right, color: context.colorScheme.onError)
+        ],
+      ),
+      style: ButtonStyle(padding: MaterialStateProperty.all(EdgeInsets.zero)),
+    );
+  }
+}
+
+
+/*
+
+BEFORE: Flutter 2.0
+FlatButton(
         padding: EdgeInsets.zero,
         onPressed: () {
           onPressed();
@@ -40,5 +64,4 @@ class HeaderButton extends StatelessWidget {
             Icon(Icons.arrow_right, color: context.colorScheme.onError)
           ],
         ));
-  }
-}
+ */

lib/view/_product/_widgets/button/login_button.dart

@@ -11,7 +11,7 @@ class MVVMLoginButton extends StatelessWidget {
     return IconNormalButton(
       icon: Icons.access_alarm,
       onPressed: () {
-        onComplete("OKEY");
+        onComplete('OKEY');
         //  BUSINESS CALL
       },
     );

lib/view/_product/_widgets/list-tile/friend_card.dart

@@ -17,13 +17,29 @@ class FriendCard extends StatelessWidget {
       title: Text(user.name),
       onTap: onPressed,
       subtitle: Text(user.company),
-      trailing: RaisedButton(
+      trailing: ElevatedButton(
+        onPressed: () {},
+        child: Text(LocaleKeys.home_social_follow).tr(),
+        style: ButtonStyle(
+          padding: MaterialStateProperty.all(EdgeInsets.zero),
+          textStyle: MaterialStateProperty.all(
+              TextStyle(color: context.colorScheme.background)),
+          backgroundColor: MaterialStateProperty.all<Color>(
+              context.appTheme.buttonTheme.colorScheme.onError),
+        ),
+      ),
+    );
+  }
+}
+
+
+/* BEFORE: Flutter 2.0
+RaisedButton (
         child: Text(LocaleKeys.home_social_follow).tr(),
         onPressed: () {},
         padding: EdgeInsets.zero,
         textColor: context.colorScheme.background,
         color: context.appTheme.buttonTheme.colorScheme.onError,
       ),
-    );
-  }
-}
+
+ */