Constant Dark Theme

lib/storage_manager.dart

@@ -0,0 +1,27 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+class StorageManager {
+  static void saveData(String key, dynamic value) async {
+    final prefs = await SharedPreferences.getInstance();
+    if (value is int) {
+      prefs.setInt(key, value);
+    } else if (value is String) {
+      prefs.setString(key, value);
+    } else if (value is bool) {
+      prefs.setBool(key, value);
+    } else {
+      throw("Invalid Type (Shared Preference Error)");
+    }
+  }
+
+  static Future<dynamic> readData(String key) async {
+    final prefs = await SharedPreferences.getInstance();
+    dynamic obj = prefs.get(key);
+    return obj;
+  }
+
+  static Future<bool> deleteData(String key) async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.remove(key);
+  }
+}