Remember last used app

This also disables Home functionality on Android.

android/app/src/main/kotlin/com/yubico/authenticator/MainViewModel.kt

@@ -23,7 +23,7 @@ import com.yubico.authenticator.device.Info
 import com.yubico.yubikit.android.transport.usb.UsbYubiKeyDevice
 
 enum class OperationContext(val value: Int) {
-    Oath(0), Yubikey(1), Invalid(-1);
+    Home(0), Oath(1), Yubikey(2), Invalid(-1);
 
     companion object {
         fun getByValue(value: Int) = values().firstOrNull { it.value == value } ?: Invalid

lib/android/init.dart

@@ -64,8 +64,8 @@ Future<Widget> initialize() async {
       oathStateProvider.overrideWithProvider(androidOathStateProvider.call),
       credentialListProvider
           .overrideWithProvider(androidCredentialListProvider.call),
-      currentAppProvider.overrideWith(
+      currentAppProvider.overrideWith((ref) => AndroidSubPageNotifier(
-          (ref) => AndroidSubPageNotifier(ref.watch(supportedAppsProvider))),
+          ref.watch(supportedAppsProvider), ref.watch(prefProvider))),
       managementStateProvider.overrideWithProvider(androidManagementState.call),
       currentDeviceProvider.overrideWith(
         () => AndroidCurrentDeviceNotifier(),
@@ -95,6 +95,7 @@ Future<Widget> initialize() async {
               ..setFeature(features.fido, false)
               ..setFeature(features.piv, false)
               ..setFeature(features.otp, false)
+              ..setFeature(features.home, false)
               ..setFeature(features.management, false);
           });
 

lib/android/state.dart

@@ -91,7 +91,7 @@ final androidSupportedThemesProvider = StateProvider<List<ThemeMode>>((ref) {
 });
 
 class AndroidSubPageNotifier extends CurrentAppNotifier {
-  AndroidSubPageNotifier(super.supportedApps) {
+  AndroidSubPageNotifier(super.supportedApps, super.prefs) {
     _handleSubPage(state);
   }
 

lib/app/state.dart

@@ -203,7 +203,8 @@ abstract class CurrentDeviceNotifier extends Notifier<DeviceNode?> {
 
 final currentAppProvider =
     StateNotifierProvider<CurrentAppNotifier, Application>((ref) {
-  final notifier = CurrentAppNotifier(ref.watch(supportedAppsProvider));
+  final notifier = CurrentAppNotifier(
+      ref.watch(supportedAppsProvider), ref.watch(prefProvider));
   ref.listen<AsyncValue<YubiKeyData>>(currentDeviceDataProvider, (_, data) {
     notifier._notifyDeviceChanged(data.whenOrNull(data: ((data) => data)));
   }, fireImmediately: true);
@@ -212,16 +213,29 @@ final currentAppProvider =
 
 class CurrentAppNotifier extends StateNotifier<Application> {
   final List<Application> _supportedApps;
+  static const String _key = 'APP_STATE_LAST_APP';
+  final SharedPreferences _prefs;
 
-  CurrentAppNotifier(this._supportedApps) : super(_supportedApps.first);
+  CurrentAppNotifier(this._supportedApps, this._prefs)
+      : super(_fromName(_prefs.getString(_key), _supportedApps));
 
   void setCurrentApp(Application app) {
     state = app;
+    _prefs.setString(_key, app.name);
   }
 
   void _notifyDeviceChanged(YubiKeyData? data) {
-    if (data == null ||
+    if (data == null) {
-        state.getAvailability(data) != Availability.unsupported) {
+      state = _supportedApps.first;
+      return;
+    }
+
+    String? lastAppName = _prefs.getString(_key);
+    if (lastAppName != null && lastAppName != state.name) {
+      // Try switching to saved app
+      state = Application.values.firstWhere((app) => app.name == lastAppName);
+    }
+    if (state.getAvailability(data) != Availability.unsupported) {
       // Keep current app
       return;
     }
@@ -231,6 +245,10 @@ class CurrentAppNotifier extends StateNotifier<Application> {
       orElse: () => _supportedApps.first,
     );
   }
+
+  static Application _fromName(String? name, List<Application> supportedApps) =>
+      supportedApps.firstWhere((element) => element.name == name,
+          orElse: () => supportedApps.first);
 }
 
 abstract class QrScanner {

lib/app/views/navigation.dart

@@ -19,6 +19,7 @@ import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:material_symbols_icons/symbols.dart';
 
+import '../../core/state.dart';
 import '../models.dart';
 import '../state.dart';
 import 'device_picker.dart';
@@ -126,7 +127,9 @@ class NavigationContent extends ConsumerWidget {
             .where(
                 (app) => app.getAvailability(data) != Availability.unsupported)
             .toList()
-        : [Application.home];
+        : !isAndroid // TODO: Remove check when Home is implemented on Android
+            ? [Application.home]
+            : <Application>[];
     availableApps.remove(Application.management);
     final currentApp = ref.watch(currentAppProvider);
 
@@ -138,9 +141,7 @@ class NavigationContent extends ConsumerWidget {
             duration: const Duration(milliseconds: 150),
             child: DevicePickerContent(extended: extended),
           ),
-
           const SizedBox(height: 32),
-
           AnimatedSize(
             duration: const Duration(milliseconds: 150),
             child: Column(
@@ -153,7 +154,7 @@ class NavigationContent extends ConsumerWidget {
                           Icon(app._icon, fill: app == currentApp ? 1.0 : 0.0),
                       collapsed: !extended,
                       selected: app == currentApp,
-                      onTap: currentApp == Application.home ||
+                      onTap: data == null && currentApp == Application.home ||
                               data != null &&
                                   app.getAvailability(data) ==
                                       Availability.enabled
@@ -171,32 +172,6 @@ class NavigationContent extends ConsumerWidget {
               ],
             ),
           ),
-
-          // // Non-YubiKey pages
-          // NavigationItem(
-          //   leading: const Icon(Icons.settings_outlined),
-          //   key: settingDrawerIcon,
-          //   title: l10n.s_settings,
-          //   collapsed: !extended,
-          //   onTap: () {
-          //     if (shouldPop) {
-          //       Navigator.of(context).pop();
-          //     }
-          //     Actions.maybeInvoke(context, const SettingsIntent());
-          //   },
-          // ),
-          // NavigationItem(
-          //   leading: const Icon(Icons.help_outline),
-          //   key: helpDrawerIcon,
-          //   title: l10n.s_help_and_about,
-          //   collapsed: !extended,
-          //   onTap: () {
-          //     if (shouldPop) {
-          //       Navigator.of(context).pop();
-          //     }
-          //     Actions.maybeInvoke(context, const AboutIntent());
-          //   },
-          // ),
         ],
       ),
     );

lib/home/views/home_message_page.dart

@@ -21,6 +21,7 @@ import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../app/views/message_page.dart';
+import '../../core/state.dart';
 import '../../management/models.dart';
 import 'key_actions.dart';
 
@@ -59,13 +60,15 @@ class HomeMessagePage extends ConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final l10n = AppLocalizations.of(context)!;
 
+    // TODO: Remove Android check when Home is implemented on Android
     return MessagePage(
-      title: l10n.s_home,
+      title: !isAndroid ? l10n.s_home : null,
       graphic: graphic,
       header: header,
       message: message,
       footnote: footnote,
-      keyActionsBuilder: (context) => homeBuildActions(context, null, ref),
+      keyActionsBuilder:
+          !isAndroid ? (context) => homeBuildActions(context, null, ref) : null,
       actionButtonBuilder: actionButtonBuilder,
       actionsBuilder: actionsBuilder,
       fileDropOverlay: fileDropOverlay,