diff --git a/flutter/lib/common.dart b/flutter/lib/common.dart
index ec83e1123..93fe0fee5 100644
--- a/flutter/lib/common.dart
+++ b/flutter/lib/common.dart
@@ -15,7 +15,6 @@ import 'package:flutter_hbb/main.dart';
 import 'package:flutter_hbb/models/peer_model.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
 import 'package:get/get.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:uni_links/uni_links.dart';
 import 'package:uni_links_desktop/uni_links_desktop.dart';
 import 'package:window_manager/window_manager.dart';
@@ -205,18 +204,17 @@ class MyTheme {
   );
 
   static ThemeMode getThemeModePreference() {
-    return themeModeFromString(
-        Get.find<SharedPreferences>().getString("themeMode") ?? "");
+    return themeModeFromString(bind.mainGetLocalOption(key: kCommConfKeyTheme));
   }
 
   static void changeDarkMode(ThemeMode mode) {
     final preference = getThemeModePreference();
     if (preference != mode) {
       if (mode == ThemeMode.system) {
-        Get.find<SharedPreferences>().setString("themeMode", "");
+        bind.mainSetLocalOption(key: kCommConfKeyTheme, value: '');
       } else {
-        Get.find<SharedPreferences>()
-            .setString("themeMode", mode.toShortString());
+        bind.mainSetLocalOption(
+            key: kCommConfKeyTheme, value: mode.toShortString());
       }
       Get.changeThemeMode(mode);
       if (desktopType == DesktopType.main) {
@@ -1026,8 +1024,8 @@ Future<void> saveWindowPosition(WindowType type, {int? windowId}) async {
       final isMaximized = await windowManager.isMaximized();
       final pos = LastWindowPosition(
           sz.width, sz.height, position.dx, position.dy, isMaximized);
-      await Get.find<SharedPreferences>()
-          .setString(kWindowPrefix + type.name, pos.toString());
+      await bind.setLocalFlutterConfig(
+          k: kWindowPrefix + type.name, v: pos.toString());
       break;
     default:
       final wc = WindowController.fromWindowId(windowId!);
@@ -1037,9 +1035,10 @@ Future<void> saveWindowPosition(WindowType type, {int? windowId}) async {
       final isMaximized = await wc.isMaximized();
       final pos = LastWindowPosition(
           sz.width, sz.height, position.dx, position.dy, isMaximized);
-      debugPrint("saving frame: ${windowId}: ${pos.width}/${pos.height}, offset:${pos.offsetWidth}/${pos.offsetHeight}");
-      await Get.find<SharedPreferences>()
-          .setString(kWindowPrefix + type.name, pos.toString());
+      debugPrint(
+          "saving frame: $windowId: ${pos.width}/${pos.height}, offset:${pos.offsetWidth}/${pos.offsetHeight}");
+      await bind.setLocalFlutterConfig(
+          k: kWindowPrefix + type.name, v: pos.toString());
       break;
   }
 }
@@ -1109,7 +1108,7 @@ Future<Offset?> _adjustRestoreMainWindowOffset(
         .toDouble();
 
     if (isDesktop || isWebDesktop) {
-      for(final screen in await window_size.getScreenList()) {
+      for (final screen in await window_size.getScreenList()) {
         frameLeft = min(screen.visibleFrame.left, frameLeft);
         frameTop = min(screen.visibleFrame.top, frameTop);
         frameRight = max(screen.visibleFrame.right, frameRight);
@@ -1136,13 +1135,7 @@ Future<bool> restoreWindowPosition(WindowType type, {int? windowId}) async {
     debugPrint(
         "Error: windowId cannot be null when saving positions for sub window");
   }
-  final pos =
-      Get.find<SharedPreferences>().getString(kWindowPrefix + type.name);
-
-  if (pos == null) {
-    debugPrint("no window position saved, ignore restore");
-    return false;
-  }
+  final pos = bind.getLocalFlutterConfig(k: kWindowPrefix + type.name);
   var lpos = LastWindowPosition.loadFromString(pos);
   if (lpos == null) {
     debugPrint("window position saved, but cannot be parsed");
@@ -1175,7 +1168,8 @@ Future<bool> restoreWindowPosition(WindowType type, {int? windowId}) async {
             await _adjustRestoreMainWindowSize(lpos.width, lpos.height);
         final offset = await _adjustRestoreMainWindowOffset(
             lpos.offsetWidth, lpos.offsetHeight);
-        debugPrint("restore lpos: ${size.width}/${size.height}, offset:${offset?.dx}/${offset?.dy}");
+        debugPrint(
+            "restore lpos: ${size.width}/${size.height}, offset:${offset?.dx}/${offset?.dy}");
         if (offset == null) {
           await wc.center();
         } else {
@@ -1327,8 +1321,7 @@ void connect(BuildContext context, String id,
 
 Future<Map<String, String>> getHttpHeaders() async {
   return {
-    'Authorization':
-        'Bearer ${await bind.mainGetLocalOption(key: 'access_token')}'
+    'Authorization': 'Bearer ${bind.mainGetLocalOption(key: 'access_token')}'
   };
 }
 
diff --git a/flutter/lib/common/widgets/peer_tab_page.dart b/flutter/lib/common/widgets/peer_tab_page.dart
index 81559a3d3..9129e4711 100644
--- a/flutter/lib/common/widgets/peer_tab_page.dart
+++ b/flutter/lib/common/widgets/peer_tab_page.dart
@@ -22,27 +22,26 @@ class _PeerTabPageState extends State<PeerTabPage>
 
   @override
   void initState() {
-    () async {
-      await bind.mainGetLocalOption(key: 'peer-tab-index').then((value) {
-        if (value == '') return;
-        final tab = int.parse(value);
-        _tabIndex.value = tab;
-      });
-      await bind.mainGetLocalOption(key: 'peer-card-ui-type').then((value) {
-        if (value == '') return;
-        final tab = int.parse(value);
-        peerCardUiType.value =
-            tab == PeerUiType.list.index ? PeerUiType.list : PeerUiType.grid;
-      });
-    }();
+    setPeer();
     super.initState();
   }
 
+  setPeer() {
+    final index = bind.getLocalFlutterConfig(k: 'peer-tab-index');
+    if (index == '') return;
+    _tabIndex.value = int.parse(index);
+
+    final uiType = bind.getLocalFlutterConfig(k: 'peer-card-ui-type');
+    if (uiType == '') return;
+    peerCardUiType.value = int.parse(uiType) == PeerUiType.list.index
+        ? PeerUiType.list
+        : PeerUiType.grid;
+  }
+
   // hard code for now
   Future<void> _handleTabSelection(int index) async {
     _tabIndex.value = index;
-    await bind.mainSetLocalOption(
-        key: 'peer-tab-index', value: index.toString());
+    await bind.setLocalFlutterConfig(k: 'peer-tab-index', v: index.toString());
     switch (index) {
       case 0:
         bind.mainLoadRecentPeers();
@@ -148,9 +147,8 @@ class _PeerTabPageState extends State<PeerTabPage>
                   decoration: peerCardUiType.value == type ? activeDeco : null,
                   child: InkWell(
                       onTap: () async {
-                        await bind.mainSetLocalOption(
-                            key: 'peer-card-ui-type',
-                            value: type.index.toString());
+                        await bind.setLocalFlutterConfig(
+                            k: 'peer-card-ui-type', v: type.index.toString());
                         peerCardUiType.value = type;
                       },
                       child: Icon(
diff --git a/flutter/lib/consts.dart b/flutter/lib/consts.dart
index 48e99943f..acba32780 100644
--- a/flutter/lib/consts.dart
+++ b/flutter/lib/consts.dart
@@ -56,7 +56,11 @@ var kWindowEdgeSize = Platform.isWindows ? 1.0 : 5.0;
 const kWindowBorderWidth = 1.0;
 const kDesktopMenuPadding = EdgeInsets.only(left: 12.0, right: 3.0);
 
-const kInvalidValueStr = "InvalidValueStr";
+const kInvalidValueStr = 'InvalidValueStr';
+
+// Config key shared by flutter and other ui.
+const kCommConfKeyTheme = 'theme';
+const kCommConfKeyLang = 'lang';
 
 const kMobilePageConstraints = BoxConstraints(maxWidth: 600);
 
diff --git a/flutter/lib/desktop/pages/desktop_setting_page.dart b/flutter/lib/desktop/pages/desktop_setting_page.dart
index 12bb935e9..ab8f76ca5 100644
--- a/flutter/lib/desktop/pages/desktop_setting_page.dart
+++ b/flutter/lib/desktop/pages/desktop_setting_page.dart
@@ -5,6 +5,7 @@ import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_hbb/common.dart';
+import 'package:flutter_hbb/consts.dart';
 import 'package:flutter_hbb/desktop/pages/desktop_home_page.dart';
 import 'package:flutter_hbb/desktop/pages/desktop_tab_page.dart';
 import 'package:flutter_hbb/desktop/widgets/login.dart';
@@ -30,8 +31,8 @@ const double _kListViewBottomMargin = 15;
 const double _kTitleFontSize = 20;
 const double _kContentFontSize = 15;
 const Color _accentColor = MyTheme.accent;
-const String _kSettingPageControllerTag = "settingPageController";
-const String _kSettingPageIndexTag = "settingPageIndex";
+const String _kSettingPageControllerTag = 'settingPageController';
+const String _kSettingPageIndexTag = 'settingPageIndex';
 
 class _TabInfo {
   late final String label;
@@ -250,19 +251,19 @@ class _GeneralState extends State<_General> {
 
     return _Card(title: 'Theme', children: [
       _Radio<String>(context,
-          value: "light",
+          value: 'light',
           groupValue: current,
-          label: "Light",
+          label: 'Light',
           onChanged: onChanged),
       _Radio<String>(context,
-          value: "dark",
+          value: 'dark',
           groupValue: current,
-          label: "Dark",
+          label: 'Dark',
           onChanged: onChanged),
       _Radio<String>(context,
-          value: "system",
+          value: 'system',
           groupValue: current,
-          label: "Follow System",
+          label: 'Follow System',
           onChanged: onChanged),
     ]);
   }
@@ -286,8 +287,8 @@ class _GeneralState extends State<_General> {
 
   Widget audio(BuildContext context) {
     String getDefault() {
-      if (Platform.isWindows) return "System Sound";
-      return "";
+      if (Platform.isWindows) return 'System Sound';
+      return '';
     }
 
     Future<String> getValue() async {
@@ -300,7 +301,7 @@ class _GeneralState extends State<_General> {
     }
 
     setDevice(String device) {
-      if (device == getDefault()) device = "";
+      if (device == getDefault()) device = '';
       bind.mainSetOption(key: 'audio-input', value: device);
     }
 
@@ -353,7 +354,7 @@ class _GeneralState extends State<_General> {
             'allow-auto-record-incoming'),
         Row(
           children: [
-            Text('${translate('Directory')}:'),
+            Text('${translate("Directory")}:'),
             Expanded(
               child: GestureDetector(
                   onTap: canlaunch ? () => launchUrl(Uri.file(dir)) : null,
@@ -386,26 +387,26 @@ class _GeneralState extends State<_General> {
   Widget language() {
     return _futureBuilder(future: () async {
       String langs = await bind.mainGetLangs();
-      String lang = await bind.mainGetLocalOption(key: "lang");
-      return {"langs": langs, "lang": lang};
+      String lang = bind.mainGetLocalOption(key: kCommConfKeyLang);
+      return {'langs': langs, 'lang': lang};
     }(), hasData: (res) {
       Map<String, String> data = res as Map<String, String>;
-      List<dynamic> langsList = jsonDecode(data["langs"]!);
+      List<dynamic> langsList = jsonDecode(data['langs']!);
       Map<String, String> langsMap = {for (var v in langsList) v[0]: v[1]};
       List<String> keys = langsMap.keys.toList();
       List<String> values = langsMap.values.toList();
-      keys.insert(0, "");
-      values.insert(0, "Default");
-      String currentKey = data["lang"]!;
+      keys.insert(0, '');
+      values.insert(0, 'Default');
+      String currentKey = data['lang']!;
       if (!keys.contains(currentKey)) {
-        currentKey = "";
+        currentKey = '';
       }
       return _ComboBox(
         keys: keys,
         values: values,
         initialKey: currentKey,
         onChanged: (key) async {
-          await bind.mainSetLocalOption(key: "lang", value: key);
+          await bind.mainSetLocalOption(key: kCommConfKeyLang, value: key);
           reloadAllWindows();
           bind.mainChangeLanguage(lang: key);
         },
@@ -585,9 +586,9 @@ class _SafetyState extends State<_Safety> with AutomaticKeepAliveClientMixin {
             kUseBothPasswords,
           ];
           List<String> values = [
-            translate("Use temporary password"),
-            translate("Use permanent password"),
-            translate("Use both passwords"),
+            translate('Use temporary password'),
+            translate('Use permanent password'),
+            translate('Use both passwords'),
           ];
           bool tmpEnabled = model.verificationMethod != kUsePermanentPassword;
           bool permEnabled = model.verificationMethod != kUseTemporaryPassword;
@@ -830,12 +831,12 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
       // Setting page is not modal, oldOptions should only be used when getting options, never when setting.
       Map<String, dynamic> oldOptions = jsonDecode(data! as String);
       old(String key) {
-        return (oldOptions[key] ?? "").trim();
+        return (oldOptions[key] ?? '').trim();
       }
 
-      RxString idErrMsg = "".obs;
-      RxString relayErrMsg = "".obs;
-      RxString apiErrMsg = "".obs;
+      RxString idErrMsg = ''.obs;
+      RxString relayErrMsg = ''.obs;
+      RxString apiErrMsg = ''.obs;
       var idController =
           TextEditingController(text: old('custom-rendezvous-server'));
       var relayController = TextEditingController(text: old('relay-server'));
@@ -864,9 +865,9 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
         }
         if (apiServer.isNotEmpty) {
           if (!apiServer.startsWith('http://') ||
-              !apiServer.startsWith("https://")) {
+              !apiServer.startsWith('https://')) {
             apiErrMsg.value =
-                "${translate("API Server")}: ${translate("invalid_http")}";
+                '${translate("API Server")}: ${translate("invalid_http")}';
             return false;
           }
         }
@@ -893,7 +894,7 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
       import() {
         Clipboard.getData(Clipboard.kTextPlain).then((value) {
           TextEditingController mytext = TextEditingController();
-          String? aNullableString = "";
+          String? aNullableString = '';
           aNullableString = value?.text;
           mytext.text = aNullableString.toString();
           if (mytext.text.isNotEmpty) {
@@ -918,13 +919,13 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
                   }
                 });
               } else {
-                showToast(translate("Invalid server configuration"));
+                showToast(translate('Invalid server configuration'));
               }
             } catch (e) {
-              showToast(translate("Invalid server configuration"));
+              showToast(translate('Invalid server configuration'));
             }
           } else {
-            showToast(translate("Clipboard is empty"));
+            showToast(translate('Clipboard is empty'));
           }
         });
       }
@@ -936,7 +937,7 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
         config['ApiServer'] = apiController.text.trim();
         config['Key'] = keyController.text.trim();
         Clipboard.setData(ClipboardData(text: jsonEncode(config)));
-        showToast(translate("Export server configuration successfully"));
+        showToast(translate('Export server configuration successfully'));
       }
 
       bool secure = !enabled;
@@ -962,7 +963,7 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
             Obx(() => _LabeledTextField(context, 'API Server', apiController,
                 apiErrMsg.value, enabled, secure)),
             _LabeledTextField(
-                context, 'Key', keyController, "", enabled, secure),
+                context, 'Key', keyController, '', enabled, secure),
             Row(
               mainAxisAlignment: MainAxisAlignment.end,
               children: [_Button('Apply', submit, enabled: enabled)],
@@ -1039,28 +1040,28 @@ class _AboutState extends State<_About> {
           child: SingleChildScrollView(
             controller: scrollController,
             physics: NeverScrollableScrollPhysics(),
-            child: _Card(title: "About RustDesk", children: [
+            child: _Card(title: 'About RustDesk', children: [
               Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   const SizedBox(
                     height: 8.0,
                   ),
-                  Text("Version: $version").marginSymmetric(vertical: 4.0),
+                  Text('Version: $version').marginSymmetric(vertical: 4.0),
                   InkWell(
                       onTap: () {
-                        launchUrlString("https://rustdesk.com/privacy");
+                        launchUrlString('https://rustdesk.com/privacy');
                       },
                       child: const Text(
-                        "Privacy Statement",
+                        'Privacy Statement',
                         style: linkStyle,
                       ).marginSymmetric(vertical: 4.0)),
                   InkWell(
                       onTap: () {
-                        launchUrlString("https://rustdesk.com");
+                        launchUrlString('https://rustdesk.com');
                       },
                       child: const Text(
-                        "Website",
+                        'Website',
                         style: linkStyle,
                       ).marginSymmetric(vertical: 4.0)),
                   Container(
@@ -1074,11 +1075,11 @@ class _AboutState extends State<_About> {
                             crossAxisAlignment: CrossAxisAlignment.start,
                             children: [
                               Text(
-                                "Copyright &copy; 2022 Purslane Ltd.\n$license",
+                                'Copyright &copy; 2022 Purslane Ltd.\n$license',
                                 style: const TextStyle(color: Colors.white),
                               ),
                               const Text(
-                                "Made with heart in this chaotic world!",
+                                'Made with heart in this chaotic world!',
                                 style: TextStyle(
                                     fontWeight: FontWeight.w800,
                                     color: Colors.white),
@@ -1472,10 +1473,10 @@ class _ComboBox extends StatelessWidget {
 void changeSocks5Proxy() async {
   var socks = await bind.mainGetSocks();
 
-  String proxy = "";
-  String proxyMsg = "";
-  String username = "";
-  String password = "";
+  String proxy = '';
+  String proxyMsg = '';
+  String username = '';
+  String password = '';
   if (socks.length == 3) {
     proxy = socks[0];
     username = socks[1];
@@ -1489,7 +1490,7 @@ void changeSocks5Proxy() async {
   gFFI.dialogManager.show((setState, close) {
     submit() async {
       setState(() {
-        proxyMsg = "";
+        proxyMsg = '';
         isInProgress = true;
       });
       cancel() {
@@ -1517,7 +1518,7 @@ void changeSocks5Proxy() async {
     }
 
     return CustomAlertDialog(
-      title: Text(translate("Socks5 Proxy")),
+      title: Text(translate('Socks5 Proxy')),
       content: ConstrainedBox(
         constraints: const BoxConstraints(minWidth: 500),
         child: Column(
@@ -1530,7 +1531,7 @@ void changeSocks5Proxy() async {
               children: [
                 ConstrainedBox(
                     constraints: const BoxConstraints(minWidth: 100),
-                    child: Text("${translate('Hostname')}:")
+                    child: Text('${translate("Hostname")}:')
                         .marginOnly(bottom: 16.0)),
                 const SizedBox(
                   width: 24.0,
@@ -1553,7 +1554,7 @@ void changeSocks5Proxy() async {
               children: [
                 ConstrainedBox(
                     constraints: const BoxConstraints(minWidth: 100),
-                    child: Text("${translate('Username')}:")
+                    child: Text('${translate("Username")}:')
                         .marginOnly(bottom: 16.0)),
                 const SizedBox(
                   width: 24.0,
@@ -1575,7 +1576,7 @@ void changeSocks5Proxy() async {
               children: [
                 ConstrainedBox(
                     constraints: const BoxConstraints(minWidth: 100),
-                    child: Text("${translate('Password')}:")
+                    child: Text('${translate("Password")}:')
                         .marginOnly(bottom: 16.0)),
                 const SizedBox(
                   width: 24.0,
@@ -1599,8 +1600,8 @@ void changeSocks5Proxy() async {
         ),
       ),
       actions: [
-        TextButton(onPressed: close, child: Text(translate("Cancel"))),
-        TextButton(onPressed: submit, child: Text(translate("OK"))),
+        TextButton(onPressed: close, child: Text(translate('Cancel'))),
+        TextButton(onPressed: submit, child: Text(translate('OK'))),
       ],
       onSubmit: submit,
       onCancel: close,
diff --git a/flutter/lib/desktop/widgets/remote_menubar.dart b/flutter/lib/desktop/widgets/remote_menubar.dart
index be04cb2ba..75311c4c5 100644
--- a/flutter/lib/desktop/widgets/remote_menubar.dart
+++ b/flutter/lib/desktop/widgets/remote_menubar.dart
@@ -7,7 +7,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_hbb/models/chat_model.dart';
 import 'package:flutter_hbb/models/state_model.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
 import 'package:rxdart/rxdart.dart' as rxdart;
@@ -28,12 +27,14 @@ class MenubarState {
   late RxBool _pin;
 
   MenubarState() {
-    final s = Get.find<SharedPreferences>().getString(kStoreKey);
-    if (s == null) {
+    final s = bind.getLocalFlutterConfig(k: kStoreKey);
+    if (s.isEmpty) {
       _initSet(false, false);
+      return;
     }
+
     try {
-      final m = jsonDecode(s!);
+      final m = jsonDecode(s);
       if (m == null) {
         _initSet(false, false);
       } else {
@@ -77,11 +78,8 @@ class MenubarState {
   }
 
   save() async {
-    final success = await Get.find<SharedPreferences>()
-        .setString(kStoreKey, jsonEncode({'pin': _pin.value}.toString()));
-    if (!success) {
-      debugPrint('Failed to save remote menu bar state');
-    }
+    bind.setLocalFlutterConfig(
+        k: kStoreKey, v: jsonEncode({'pin': _pin.value}));
   }
 }
 
diff --git a/flutter/lib/main.dart b/flutter/lib/main.dart
index ae15b5cf6..989ba12f5 100644
--- a/flutter/lib/main.dart
+++ b/flutter/lib/main.dart
@@ -15,7 +15,6 @@ import 'package:flutter_hbb/utils/multi_window_manager.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:window_manager/window_manager.dart';
 import 'package:bot_toast/bot_toast.dart';
 
@@ -97,7 +96,6 @@ Future<void> main(List<String> args) async {
 
 Future<void> initEnv(String appType) async {
   // global shared preference
-  await Get.putAsync(() => SharedPreferences.getInstance());
   await platformFFI.init(appType);
   // global FFI, use this **ONLY** for global configuration
   // for convenience, use global FFI on mobile platform
diff --git a/flutter/lib/models/model.dart b/flutter/lib/models/model.dart
index be97b41ff..616a1c985 100644
--- a/flutter/lib/models/model.dart
+++ b/flutter/lib/models/model.dart
@@ -16,7 +16,6 @@ import 'package:flutter_hbb/models/server_model.dart';
 import 'package:flutter_hbb/models/user_model.dart';
 import 'package:flutter_hbb/models/state_model.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:tuple/tuple.dart';
 import 'package:image/image.dart' as img2;
 import 'package:flutter_custom_cursor/flutter_custom_cursor.dart';
@@ -1219,7 +1218,7 @@ class FFI {
   Future<void> close() async {
     chatModel.close();
     if (imageModel.image != null && !isWebDesktop) {
-      await savePreference(id, cursorModel.x, cursorModel.y, canvasModel.x,
+      await setCanvasConfig(id, cursorModel.x, cursorModel.y, canvasModel.x,
           canvasModel.y, canvasModel.scale, ffiModel.pi.currentDisplay);
     }
     bind.sessionClose(id: id);
@@ -1267,9 +1266,10 @@ class PeerInfo {
   List<Display> displays = [];
 }
 
-Future<void> savePreference(String id, double xCursor, double yCursor,
+const canvasKey = 'canvas';
+
+Future<void> setCanvasConfig(String id, double xCursor, double yCursor,
     double xCanvas, double yCanvas, double scale, int currentDisplay) async {
-  SharedPreferences prefs = await SharedPreferences.getInstance();
   final p = <String, dynamic>{};
   p['xCursor'] = xCursor;
   p['yCursor'] = yCursor;
@@ -1277,25 +1277,27 @@ Future<void> savePreference(String id, double xCursor, double yCursor,
   p['yCanvas'] = yCanvas;
   p['scale'] = scale;
   p['currentDisplay'] = currentDisplay;
-  prefs.setString('peer$id', json.encode(p));
+  await bind.sessionSetFlutterConfig(id: id, k: canvasKey, v: jsonEncode(p));
 }
 
-Future<Map<String, dynamic>?> getPreference(String id) async {
+Future<Map<String, dynamic>?> getCanvasConfig(String id) async {
   if (!isWebDesktop) return null;
-  SharedPreferences prefs = await SharedPreferences.getInstance();
-  var p = prefs.getString('peer$id');
-  if (p == null) return null;
-  Map<String, dynamic> m = json.decode(p);
-  return m;
+  var p = await bind.sessionGetFlutterConfig(id: id, k: canvasKey);
+  if (p == null || p.isEmpty) return null;
+  try {
+    Map<String, dynamic> m = json.decode(p);
+    return m;
+  } catch (e) {
+    return null;
+  }
 }
 
 void removePreference(String id) async {
-  SharedPreferences prefs = await SharedPreferences.getInstance();
-  prefs.remove('peer$id');
+  await bind.sessionSetFlutterConfig(id: id, k: canvasKey, v: '');
 }
 
 Future<void> initializeCursorAndCanvas(FFI ffi) async {
-  var p = await getPreference(ffi.id);
+  var p = await getCanvasConfig(ffi.id);
   int currentDisplay = 0;
   if (p != null) {
     currentDisplay = p['currentDisplay'];
diff --git a/flutter/lib/models/user_model.dart b/flutter/lib/models/user_model.dart
index d2e83990b..e6065743c 100644
--- a/flutter/lib/models/user_model.dart
+++ b/flutter/lib/models/user_model.dart
@@ -19,7 +19,7 @@ class UserModel {
 
   void refreshCurrentUser() async {
     await getUserName();
-    final token = await bind.mainGetLocalOption(key: 'access_token');
+    final token = bind.mainGetLocalOption(key: 'access_token');
     if (token == '') return;
     final url = await bind.mainGetApiServer();
     final body = {
@@ -73,7 +73,7 @@ class UserModel {
     if (userName.isNotEmpty) {
       return userName.value;
     }
-    final userInfo = await bind.mainGetLocalOption(key: 'user_info');
+    final userInfo = bind.mainGetLocalOption(key: 'user_info');
     if (userInfo.trim().isEmpty) {
       return '';
     }
diff --git a/flutter/pubspec.yaml b/flutter/pubspec.yaml
index 4cb4b40a7..b7ffeec0a 100644
--- a/flutter/pubspec.yaml
+++ b/flutter/pubspec.yaml
@@ -40,7 +40,6 @@ dependencies:
     #firebase_analytics: ^9.1.5
     package_info_plus: ^1.4.2
     url_launcher: ^6.0.9
-    shared_preferences: ^2.0.6
     toggle_switch: ^1.4.0
     dash_chat_2: ^0.0.14
     draggable_float_widget: ^0.0.2
diff --git a/libs/hbb_common/src/config.rs b/libs/hbb_common/src/config.rs
index 9eb9cd369..cc9da6420 100644
--- a/libs/hbb_common/src/config.rs
+++ b/libs/hbb_common/src/config.rs
@@ -167,9 +167,12 @@ pub struct PeerConfig {
     #[serde(default)]
     pub show_quality_monitor: bool,
 
-    // the other scalar value must before this
+    // The other scalar value must before this
     #[serde(default)]
     pub options: HashMap<String, String>,
+    // Various data for flutter ui
+    #[serde(default)]
+    pub ui_flutter: HashMap<String, String>,
     #[serde(default)]
     pub info: PeerInfoSerde,
     #[serde(default)]
@@ -897,6 +900,9 @@ pub struct LocalConfig {
     pub fav: Vec<String>,
     #[serde(default)]
     options: HashMap<String, String>,
+    // Various data for flutter ui
+    #[serde(default)]
+    ui_flutter: HashMap<String, String>,
 }
 
 impl LocalConfig {
@@ -968,6 +974,27 @@ impl LocalConfig {
             config.store();
         }
     }
+
+    pub fn get_flutter_config(k: &str) -> String {
+        if let Some(v) = LOCAL_CONFIG.read().unwrap().ui_flutter.get(k) {
+            v.clone()
+        } else {
+            "".to_owned()
+        }
+    }
+
+    pub fn set_flutter_config(k: String, v: String) {
+        let mut config = LOCAL_CONFIG.write().unwrap();
+        let v2 = if v.is_empty() { None } else { Some(&v) };
+        if v2 != config.ui_flutter.get(&k) {
+            if v2.is_none() {
+                config.ui_flutter.remove(&k);
+            } else {
+                config.ui_flutter.insert(k, v);
+            }
+            config.store();
+        }
+    }
 }
 
 #[derive(Debug, Default, Serialize, Deserialize, Clone)]
diff --git a/src/client.rs b/src/client.rs
index d00df1c48..a938702b3 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -6,6 +6,7 @@ use cpal::{
 };
 use magnum_opus::{Channels::*, Decoder as AudioDecoder};
 use sha2::{Digest, Sha256};
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 use std::sync::atomic::Ordering;
 use std::{
     collections::HashMap,
@@ -984,6 +985,32 @@ impl LoginConfigHandler {
         self.save_config(config);
     }
 
+    /// Set a ui config of flutter for handler's [`PeerConfig`].
+    ///
+    /// # Arguments
+    ///
+    /// * `k` - key of option
+    /// * `v` - value of option
+    pub fn set_ui_flutter(&mut self, k: String, v: String) {
+        let mut config = self.load_config();
+        config.ui_flutter.insert(k, v);
+        self.save_config(config);
+    }
+
+    /// Get a ui config of flutter for handler's [`PeerConfig`].
+    /// Return String if the option is found, otherwise return "".
+    ///
+    /// # Arguments
+    ///
+    /// * `k` - key of option
+    pub fn get_ui_flutter(&self, k: &str) -> String {
+        if let Some(v) = self.config.ui_flutter.get(k) {
+            v.clone()
+        } else {
+            "".to_owned()
+        }
+    }
+
     /// Toggle an option in the handler.
     ///
     /// # Arguments
@@ -1947,6 +1974,7 @@ fn decode_id_pk(signed: &[u8], key: &sign::PublicKey) -> ResultType<(String, [u8
     }
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 pub fn disable_keyboard_listening() {
     crate::ui_session_interface::KEYBOARD_HOOKED.store(true, Ordering::SeqCst);
 }
diff --git a/src/core_main.rs b/src/core_main.rs
index 86f77946f..2298aaad6 100644
--- a/src/core_main.rs
+++ b/src/core_main.rs
@@ -122,7 +122,7 @@ pub fn core_main() -> Option<Vec<String>> {
                 hbb_common::allow_err!(crate::rc::extract_resources(&args[1]));
                 return None;
             } else if args[0] == "--tray" {
-                crate::tray::start_tray(crate::ui_interface::OPTIONS.clone());
+                crate::tray::start_tray();
                 return None;
             }
         }
diff --git a/src/flutter.rs b/src/flutter.rs
index 18425476d..a79a32533 100644
--- a/src/flutter.rs
+++ b/src/flutter.rs
@@ -227,6 +227,7 @@ impl InvokeUiSession for FlutterHandler {
         id: i32,
         entries: &Vec<FileEntry>,
         path: String,
+        #[allow(unused_variables)]
         is_local: bool,
         only_count: bool,
     ) {
diff --git a/src/flutter_ffi.rs b/src/flutter_ffi.rs
index 9552bd36e..aba8f7e1b 100644
--- a/src/flutter_ffi.rs
+++ b/src/flutter_ffi.rs
@@ -19,12 +19,12 @@ use crate::flutter::{self, SESSIONS};
 #[cfg(target_os = "android")]
 use crate::start_server;
 use crate::ui_interface::{self, *};
+#[cfg(not(any(target_os = "android", target_os = "ios")))]
+use crate::ui_session_interface::CUR_SESSION;
 use crate::{
     client::file_trait::FileManager,
     flutter::{make_fd_to_json, session_add, session_start_},
 };
-#[cfg(not(any(target_os = "android", target_os = "ios")))]
-use crate::ui_session_interface::CUR_SESSION;
 fn initialize(app_dir: &str) {
     *config::APP_DIR.write().unwrap() = app_dir.to_owned();
     #[cfg(target_os = "android")]
@@ -162,6 +162,28 @@ pub fn session_toggle_option(id: String, value: String) {
     }
 }
 
+pub fn session_get_flutter_config(id: String, k: String) -> Option<String> {
+    if let Some(session) = SESSIONS.read().unwrap().get(&id) {
+        Some(session.get_flutter_config(k))
+    } else {
+        None
+    }
+}
+
+pub fn session_set_flutter_config(id: String, k: String, v: String) {
+    if let Some(session) = SESSIONS.write().unwrap().get_mut(&id) {
+        session.set_flutter_config(k, v);
+    }
+}
+
+pub fn get_local_flutter_config(k: String) -> SyncReturn<String> {
+    SyncReturn(ui_interface::get_local_flutter_config(k))
+}
+
+pub fn set_local_flutter_config(k: String, v: String) {
+    ui_interface::set_local_flutter_config(k, v);
+}
+
 pub fn session_get_image_quality(id: String) -> Option<String> {
     if let Some(session) = SESSIONS.read().unwrap().get(&id) {
         Some(session.get_image_quality())
@@ -537,8 +559,8 @@ pub fn main_post_request(url: String, body: String, header: String) {
     post_request(url, body, header)
 }
 
-pub fn main_get_local_option(key: String) -> String {
-    get_local_option(key)
+pub fn main_get_local_option(key: String) -> SyncReturn<String> {
+    SyncReturn(get_local_option(key))
 }
 
 pub fn main_set_local_option(key: String, value: String) {
@@ -1021,7 +1043,7 @@ pub fn main_is_installed() -> SyncReturn<bool> {
     SyncReturn(is_installed())
 }
 
-pub fn main_start_grab_keyboard(){
+pub fn main_start_grab_keyboard() {
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
     crate::ui_session_interface::global_grab_keyboard();
 }
diff --git a/src/hbbs_http/account.rs b/src/hbbs_http/account.rs
index cdf724971..de0c82bb9 100644
--- a/src/hbbs_http/account.rs
+++ b/src/hbbs_http/account.rs
@@ -1,7 +1,7 @@
 use super::HbbHttpResponse;
 use hbb_common::{
     config::{Config, LocalConfig},
-    log, sleep, tokio, ResultType,
+    log, ResultType,
 };
 use reqwest::blocking::Client;
 use serde_derive::{Deserialize, Serialize};
diff --git a/src/server/video_qos.rs b/src/server/video_qos.rs
index 7aaf12d92..ba67d3fc4 100644
--- a/src/server/video_qos.rs
+++ b/src/server/video_qos.rs
@@ -225,11 +225,7 @@ impl VideoQoS {
     }
 
     pub fn check_abr_config(&mut self) -> bool {
-        self.enable_abr = if let Some(v) = Config2::get().options.get("enable-abr") {
-            v != "N"
-        } else {
-            true // default is true
-        };
+        self.enable_abr = "N" != Config::get_option("enable-abr");
         self.enable_abr
     }
 
diff --git a/src/tray.rs b/src/tray.rs
index 80647fa17..3fe43197a 100644
--- a/src/tray.rs
+++ b/src/tray.rs
@@ -1,14 +1,13 @@
-use hbb_common::log::debug;
+use super::ui_interface::get_option_opt;
 #[cfg(target_os = "linux")]
-use hbb_common::log::{error, info};
+use hbb_common::log::{debug, error, info};
 #[cfg(target_os = "linux")]
 use libappindicator::AppIndicator;
 #[cfg(target_os = "linux")]
+use std::collections::HashMap;
+#[cfg(target_os = "linux")]
 use std::env::temp_dir;
-use std::{
-    collections::HashMap,
-    sync::{Arc, Mutex},
-};
+use std::sync::{Arc, Mutex};
 #[cfg(target_os = "windows")]
 use trayicon::{MenuBuilder, TrayIconBuilder};
 #[cfg(target_os = "windows")]
@@ -25,7 +24,7 @@ enum Events {
 }
 
 #[cfg(target_os = "windows")]
-pub fn start_tray(options: Arc<Mutex<HashMap<String, String>>>) {
+pub fn start_tray() {
     let event_loop = EventLoop::<Events>::with_user_event();
     let proxy = event_loop.create_proxy();
     let icon = include_bytes!("../res/tray-icon.ico");
@@ -39,13 +38,13 @@ pub fn start_tray(options: Arc<Mutex<HashMap<String, String>>>) {
     let old_state = Arc::new(Mutex::new(0));
     let _sender = crate::ui_interface::SENDER.lock().unwrap();
     event_loop.run(move |event, _, control_flow| {
-        if options.lock().unwrap().get("ipc-closed").is_some() {
+        if get_option_opt("ipc-closed").is_some() {
             *control_flow = ControlFlow::Exit;
             return;
         } else {
             *control_flow = ControlFlow::Wait;
         }
-        let stopped = if let Some(v) = options.lock().unwrap().get("stop-service") {
+        let stopped = if let Some(v) = get_option_opt("stop-service") {
             !v.is_empty()
         } else {
             false
@@ -173,6 +172,7 @@ fn get_default_app_indicator() -> Option<AppIndicator> {
 
 /// Get service status
 /// Return [`true`] if service is running, [`false`] otherwise.
+#[cfg(target_os = "linux")]
 #[inline]
 fn get_service_status(options: Arc<Mutex<HashMap<String, String>>>) -> bool {
     if let Some(v) = options.lock().unwrap().get("stop-service") {
diff --git a/src/ui.rs b/src/ui.rs
index b11e574ba..2d7f8d70a 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -33,7 +33,8 @@ pub mod win_privacy;
 
 type Message = RendezvousMessage;
 
-pub type Childs = Arc<Mutex<(bool, HashMap<(String, String), Child>)>>;
+pub type Children = Arc<Mutex<(bool, HashMap<(String, String), Child>)>>;
+#[allow(dead_code)]
 type Status = (i32, bool, i64, String);
 
 lazy_static::lazy_static! {
@@ -43,6 +44,7 @@ lazy_static::lazy_static! {
 
 struct UIHostHandler;
 
+// to-do: dead code?
 fn check_connect_status(
     reconnect: bool,
 ) -> (
@@ -111,8 +113,8 @@ pub fn start(args: &mut [String]) {
         args[1] = id;
     }
     if args.is_empty() {
-        let child: Childs = Default::default();
-        std::thread::spawn(move || check_zombie(child));
+        let children: Children = Default::default();
+        std::thread::spawn(move || check_zombie(children));
         crate::common::check_software_update();
         frame.event_handler(UI {});
         frame.sciter_handler(UIHostHandler {});
@@ -662,10 +664,10 @@ impl sciter::host::HostHandler for UIHostHandler {
     }
 }
 
-pub fn check_zombie(childs: Childs) {
+pub fn check_zombie(children: Children) {
     let mut deads = Vec::new();
     loop {
-        let mut lock = childs.lock().unwrap();
+        let mut lock = children.lock().unwrap();
         let mut n = 0;
         for (id, c) in lock.1.iter_mut() {
             if let Ok(Some(_)) = c.try_wait() {
diff --git a/src/ui_cm_interface.rs b/src/ui_cm_interface.rs
index 61366594c..09e259fa2 100644
--- a/src/ui_cm_interface.rs
+++ b/src/ui_cm_interface.rs
@@ -2,13 +2,14 @@
 use std::sync::Arc;
 use std::{
     collections::HashMap,
-    iter::FromIterator,
     ops::{Deref, DerefMut},
     sync::{
         atomic::{AtomicI64, Ordering},
         RwLock,
     },
 };
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
+use std::iter::FromIterator;
 
 #[cfg(windows)]
 use clipboard::{cliprdr::CliprdrClientContext, empty_clipboard, set_conn_enabled, ContextSend};
diff --git a/src/ui_interface.rs b/src/ui_interface.rs
index 29b09addc..d7d1b9979 100644
--- a/src/ui_interface.rs
+++ b/src/ui_interface.rs
@@ -9,32 +9,37 @@ use std::{
 use hbb_common::password_security;
 use hbb_common::{
     allow_err,
-    config::{self, Config, LocalConfig, PeerConfig, RENDEZVOUS_PORT, RENDEZVOUS_TIMEOUT},
-    directories_next,
-    futures::future::join_all,
-    log,
-    protobuf::Message as _,
-    rendezvous_proto::*,
+    config::{self, Config, LocalConfig, PeerConfig},
+    directories_next, log,
     sleep,
-    tcp::FramedStream,
     tokio::{self, sync::mpsc, time},
 };
 
-use crate::{common::SOFTWARE_UPDATE_URL, ipc, platform};
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
+use hbb_common::{
+    config::{RENDEZVOUS_PORT, RENDEZVOUS_TIMEOUT},
+    futures::future::join_all,
+    protobuf::Message as _,
+    rendezvous_proto::*,
+    tcp::FramedStream,
+};
+
 #[cfg(feature = "flutter")]
 use crate::hbbs_http::account;
+use crate::{common::SOFTWARE_UPDATE_URL, ipc, platform};
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 type Message = RendezvousMessage;
 
-pub type Childs = Arc<Mutex<(bool, HashMap<(String, String), Child>)>>;
+pub type Children = Arc<Mutex<(bool, HashMap<(String, String), Child>)>>;
 type Status = (i32, bool, i64, String); // (status_num, key_confirmed, mouse_time, id)
 
 lazy_static::lazy_static! {
-    pub static ref CHILDS : Childs = Default::default();
-    pub static ref UI_STATUS : Arc<Mutex<Status>> = Arc::new(Mutex::new((0, false, 0, "".to_owned())));
-    pub static ref OPTIONS : Arc<Mutex<HashMap<String, String>>> = Arc::new(Mutex::new(Config::get_options()));
-    pub static ref ASYNC_JOB_STATUS : Arc<Mutex<String>> = Default::default();
-    pub static ref TEMPORARY_PASSWD : Arc<Mutex<String>> = Arc::new(Mutex::new("".to_owned()));
+    static ref CHILDREN : Children = Default::default();
+    static ref UI_STATUS : Arc<Mutex<Status>> = Arc::new(Mutex::new((0, false, 0, "".to_owned())));
+    static ref OPTIONS : Arc<Mutex<HashMap<String, String>>> = Arc::new(Mutex::new(Config::get_options()));
+    static ref ASYNC_JOB_STATUS : Arc<Mutex<String>> = Default::default();
+    static ref TEMPORARY_PASSWD : Arc<Mutex<String>> = Arc::new(Mutex::new("".to_owned()));
 }
 
 #[cfg(not(any(target_os = "android", target_os = "ios")))]
@@ -44,15 +49,16 @@ lazy_static::lazy_static! {
 
 #[inline]
 pub fn recent_sessions_updated() -> bool {
-    let mut childs = CHILDS.lock().unwrap();
-    if childs.0 {
-        childs.0 = false;
+    let mut children = CHILDREN.lock().unwrap();
+    if children.0 {
+        children.0 = false;
         true
     } else {
         false
     }
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 #[inline]
 pub fn get_id() -> String {
     #[cfg(any(target_os = "android", target_os = "ios"))]
@@ -143,10 +149,9 @@ pub fn get_license() -> String {
     #[cfg(windows)]
     if let Some(lic) = crate::platform::windows::get_license() {
         #[cfg(feature = "flutter")]
-        {
-            return format!("Key: {}\nHost: {}\nApi: {}", lic.key, lic.host, lic.api);
-        }
+        return format!("Key: {}\nHost: {}\nApi: {}", lic.key, lic.host, lic.api);
         // default license format is html formed (sciter)
+        #[cfg(not(feature = "flutter"))]
         return format!(
             "<br /> Key: {} <br /> Host: {} Api: {}",
             lic.key, lic.host, lic.api
@@ -155,6 +160,11 @@ pub fn get_license() -> String {
     Default::default()
 }
 
+#[inline]
+pub fn get_option_opt(key: &str) -> Option<String> {
+    OPTIONS.lock().unwrap().get(key).map(|x| x.clone())
+}
+
 #[inline]
 pub fn get_option(key: String) -> String {
     get_option_(&key)
@@ -180,6 +190,16 @@ pub fn set_local_option(key: String, value: String) {
     LocalConfig::set_option(key, value);
 }
 
+#[inline]
+pub fn get_local_flutter_config(key: String) -> String {
+    LocalConfig::get_flutter_config(&key)
+}
+
+#[inline]
+pub fn set_local_flutter_config(key: String, value: String) {
+    LocalConfig::set_flutter_config(key, value);
+}
+
 #[inline]
 pub fn peer_has_password(id: String) -> bool {
     !PeerConfig::load(&id).password.is_empty()
@@ -230,7 +250,7 @@ pub fn test_if_valid_server(host: String) -> String {
 }
 
 #[inline]
-#[cfg(not(any(target_os = "android", target_os = "ios")))]
+#[cfg(feature = "flutter")]
 pub fn get_sound_inputs() -> Vec<String> {
     let mut a = Vec::new();
     #[cfg(not(target_os = "linux"))]
@@ -345,12 +365,15 @@ pub fn set_socks(proxy: String, username: String, password: String) {
     .ok();
 }
 
+#[cfg(not(any(target_os = "android", target_os = "ios")))]
 #[inline]
 pub fn is_installed() -> bool {
-    #[cfg(not(any(target_os = "android", target_os = "ios")))]
-    {
-        return crate::platform::is_installed();
-    }
+    crate::platform::is_installed()
+}
+
+#[cfg(any(target_os = "android", target_os = "ios"))]
+#[inline]
+pub fn is_installed() -> bool {  
     false
 }
 
@@ -495,7 +518,7 @@ pub fn remove_peer(id: String) {
 
 #[inline]
 pub fn new_remote(id: String, remote_type: String) {
-    let mut lock = CHILDS.lock().unwrap();
+    let mut lock = CHILDREN.lock().unwrap();
     let args = vec![format!("--{}", remote_type), id.clone()];
     let key = (id.clone(), remote_type.clone());
     if let Some(c) = lock.1.get_mut(&key) {
@@ -612,6 +635,7 @@ pub fn get_version() -> String {
     crate::VERSION.to_owned()
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 #[inline]
 pub fn get_app_name() -> String {
     crate::get_app_name()
@@ -650,6 +674,7 @@ pub fn create_shortcut(_id: String) {
     crate::platform::windows::create_shortcut(&_id).ok();
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 #[inline]
 pub fn discover() {
     std::thread::spawn(move || {
@@ -694,6 +719,7 @@ pub fn open_url(url: String) {
     allow_err!(std::process::Command::new(p).arg(url).spawn());
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 #[inline]
 pub fn change_id(id: String) {
     *ASYNC_JOB_STATUS.lock().unwrap() = " ".to_owned();
@@ -800,13 +826,19 @@ pub fn is_release() -> bool {
     return false;
 }
 
+#[cfg(not(any(target_os = "android", target_os = "ios")))]
+#[inline]
+pub fn is_root() -> bool {
+    crate::platform::is_root()
+}
+
+#[cfg(any(target_os = "android", target_os = "ios"))]
 #[inline]
 pub fn is_root() -> bool {
-    #[cfg(not(any(target_os = "android", target_os = "ios")))]
-    return crate::platform::is_root();
     false
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 #[inline]
 pub fn check_super_user_permission() -> bool {
     #[cfg(feature = "flatpak")]
@@ -818,10 +850,10 @@ pub fn check_super_user_permission() -> bool {
 }
 
 #[allow(dead_code)]
-pub fn check_zombie(childs: Childs) {
+pub fn check_zombie(children: Children) {
     let mut deads = Vec::new();
     loop {
-        let mut lock = childs.lock().unwrap();
+        let mut lock = children.lock().unwrap();
         let mut n = 0;
         for (id, c) in lock.1.iter_mut() {
             if let Ok(Some(_)) = c.try_wait() {
@@ -928,6 +960,7 @@ pub(crate) async fn check_connect_status_(reconnect: bool, rx: mpsc::UnboundedRe
     }
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 #[tokio::main(flavor = "current_thread")]
 pub(crate) async fn send_to_cm(data: &ipc::Data) {
     if let Ok(mut c) = ipc::connect(1000, "_cm").await {
@@ -935,9 +968,12 @@ pub(crate) async fn send_to_cm(data: &ipc::Data) {
     }
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 const INVALID_FORMAT: &'static str = "Invalid format";
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 const UNKNOWN_ERROR: &'static str = "Unknown error";
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 #[tokio::main(flavor = "current_thread")]
 async fn change_id_(id: String, old_id: String) -> &'static str {
     if !hbb_common::is_valid_custom_id(&id) {
@@ -987,6 +1023,7 @@ async fn change_id_(id: String, old_id: String) -> &'static str {
     err
 }
 
+#[cfg(any(target_os = "android", target_os = "ios", feature = "flutter"))]
 async fn check_id(
     rendezvous_server: String,
     old_id: String,
diff --git a/src/ui_session_interface.rs b/src/ui_session_interface.rs
index bf03ed2d3..ead60299a 100644
--- a/src/ui_session_interface.rs
+++ b/src/ui_session_interface.rs
@@ -98,6 +98,14 @@ impl<T: InvokeUiSession> Session<T> {
         self.lc.write().unwrap().save_view_style(value);
     }
 
+    pub fn set_flutter_config(&mut self, k: String, v: String) {
+        self.lc.write().unwrap().set_ui_flutter(k, v);
+    }
+
+    pub fn get_flutter_config(&self, k: String) -> String {
+        self.lc.write().unwrap().get_ui_flutter(&k)
+    }
+
     pub fn toggle_option(&mut self, name: String) {
         let msg = self.lc.write().unwrap().toggle_option(name.clone());
         if name == "enable-file-transfer" {
@@ -1590,7 +1598,7 @@ pub fn global_grab_keyboard() {
     #[cfg(any(target_os = "windows", target_os = "macos"))]
     std::thread::spawn(move || {
         let func = move |event: Event| match event.event_type {
-            EventType::KeyPress(key) | EventType::KeyRelease(key) => {
+            EventType::KeyPress(..) | EventType::KeyRelease(..) => {
                 // grab all keys
                 if !IS_IN.load(Ordering::SeqCst) {
                     return Some(event);