App Functionality

lib/app.dart

@@ -20,6 +20,7 @@ import 'features/dashboard/screens/dashboard_screen.dart';
 import 'features/auth/screens/mpin_screen.dart';
 import 'package:local_auth/local_auth.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'dart:async';
 
 class KMobile extends StatefulWidget {
   const KMobile({super.key});
@@ -34,13 +35,15 @@ class KMobile extends StatefulWidget {
   }
 }
 
-class _KMobileState extends State<KMobile> {
+class _KMobileState extends State<KMobile> with WidgetsBindingObserver {
+  Timer? _backgroundTimer;
   bool showSplash = true;
   Locale? _locale;
 
   @override
   void initState() {
     super.initState();
+    WidgetsBinding.instance.addObserver(this); 
     loadPreferences();
     Future.delayed(const Duration(seconds: 3), () {
       setState(() {
@@ -49,10 +52,32 @@ class _KMobileState extends State<KMobile> {
     });
   }
 
+ @override
+ void dispose() {
+   WidgetsBinding.instance.removeObserver(this);
+   _backgroundTimer?.cancel(); 
+   super.dispose();
+ }
+
+@override
+void didChangeAppLifecycleState(AppLifecycleState state) {
+  super.didChangeAppLifecycleState(state);
+  switch (state) {
+    case AppLifecycleState.resumed:
+      _backgroundTimer?.cancel();
+      break;
+    case AppLifecycleState.paused:
+      _backgroundTimer = Timer(const Duration(minutes: 2), () {
+        SystemNavigator.pop();
+      });
+      break;
+    default:
+      break;
+  }
+}
+
   Future<void> loadPreferences() async {
     final prefs = await SharedPreferences.getInstance();
-
-    // Load Locale
     final String? langCode = prefs.getString('locale');
     if (langCode != null) {
       setState(() {
@@ -117,7 +142,6 @@ class _KMobileState extends State<KMobile> {
 
 class AuthGate extends StatefulWidget {
   const AuthGate({super.key});
-
   @override
   State<AuthGate> createState() => _AuthGateState();
 }
@@ -180,7 +204,6 @@ class _AuthGateState extends State<AuthGate> {
     if (_checking) {
       return const SplashScreen();
     }
-
     if (_isLoggedIn) {
       if (_hasMPin) {
         if (_biometricEnabled) {
@@ -190,11 +213,9 @@ class _AuthGateState extends State<AuthGate> {
               if (snapshot.connectionState == ConnectionState.waiting) {
                 return const SplashScreen();
               }
-
               if (snapshot.data == true) {
-                return const NavigationScaffold(); // Authenticated
+                return const NavigationScaffold(); 
               }
-
               return MPinScreen(
                 mode: MPinMode.enter,
                 onCompleted: (_) {
@@ -225,7 +246,6 @@ class _AuthGateState extends State<AuthGate> {
           onCompleted: (_) async {
             final storage = getIt<SecureStorage>();
             final localAuth = LocalAuthentication();
-
             final optIn = await showDialog<bool>(
               context: context,
               barrierDismissible: false,
@@ -246,7 +266,6 @@ class _AuthGateState extends State<AuthGate> {
                 ],
               ),
             );
-
             if (optIn == true) {
               final canCheck = await localAuth.canCheckBiometrics;
               bool didAuth = false;
@@ -254,7 +273,6 @@ class _AuthGateState extends State<AuthGate> {
               if (context.mounted) {
                 authEnable = AppLocalizations.of(context).authenticateToEnable;
               }
-
               if (canCheck) {
                 didAuth = await localAuth.authenticate(
                   localizedReason: authEnable,
@@ -269,7 +287,6 @@ class _AuthGateState extends State<AuthGate> {
                 await storage.write('biometric_enabled', 'false');
               }
             }
-
             if (context.mounted) {
               Navigator.of(context).pushReplacement(
                 MaterialPageRoute(
@@ -287,7 +304,6 @@ class _AuthGateState extends State<AuthGate> {
 
 class NavigationScaffold extends StatefulWidget {
   const NavigationScaffold({super.key});
-
   @override
   State<NavigationScaffold> createState() => _NavigationScaffoldState();
 }
@@ -295,7 +311,6 @@ class NavigationScaffold extends StatefulWidget {
 class _NavigationScaffoldState extends State<NavigationScaffold> {
   final PageController _pageController = PageController();
   int _selectedIndex = 0;
-
   final List<Widget> _pages = [
     const DashboardScreen(),
     const CardManagementScreen(),
@@ -372,11 +387,9 @@ class _NavigationScaffoldState extends State<NavigationScaffold> {
   }
 }
 
-// Add this widget at the end of the file
 class BiometricPromptScreen extends StatelessWidget {
   final VoidCallback onCompleted;
   const BiometricPromptScreen({super.key, required this.onCompleted});
-
   Future<void> _handleBiometric(BuildContext context) async {
     final localAuth = LocalAuthentication();
     final canCheck = await localAuth.canCheckBiometrics;
@@ -444,4 +457,4 @@ class BiometricPromptScreen extends StatelessWidget {
       onCompleted();
     }
   }
-}
+}