Save preferences to same directory to binary file on Windows

lib/config/shared_preferences.dart

@@ -0,0 +1,43 @@
+import 'base.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class SharedPreferencesConfig implements Config {
+  SharedPreferencesConfig(this._prefs);
+  final SharedPreferences _prefs;
+  @override
+  Future<bool> clear() {
+    return _prefs.clear();
+  }
+  @override
+  bool containsKey(String key) {
+    return _prefs.containsKey(key);
+  }
+  @override
+  Object? get(String key) {
+    return _prefs.get(key);
+  }
+  @override
+  String? getString(String key) {
+    return _prefs.getString(key);
+  }
+  @override
+  Future<bool> setString(String key, String value) {
+    return _prefs.setString(key, value);
+  }
+  @override
+  int? getInt(String key) {
+    return _prefs.getInt(key);
+  }
+  @override
+  Future<bool> setInt(String key, int value) {
+    return _prefs.setInt(key, value);
+  }
+  @override
+  bool? getBool(String key) {
+    return _prefs.getBool(key);
+  }
+  @override
+  Future<bool> setBool(String key, bool value) {
+    return _prefs.setBool(key, value);
+  }
+}