Settings page added

lib/Data.dart

@@ -1,5 +1,9 @@
+import 'dart:async';
+
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:uuid/uuid.dart';
+import 'theme_provider.dart';
+import 'package:provider/provider.dart';
 class Category{
 
   Category(this.category_id, this.name, this.color, this.productive);
@@ -80,8 +84,9 @@ class Queries{
 }
 
 
-class Settings{
 
+
+class Settings{
   static Future<String> UUID() async{
     final prefs = await SharedPreferences.getInstance();
     if(prefs.containsKey('uuid')){
@@ -93,4 +98,11 @@ class Settings{
         return Future.value(_uuid);
     }
   }
-}
+
+
+  static Future<void> setTheme(int value) async{
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt("theme", value);
+  }
+}
+final settings = Settings();