A Singleton sharedpref using GetX

A Singleton SharedPref

import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';

class SharedPref extends GetxService {
  static late SharedPreferences _pref;

  Future<SharedPref> init() async {
    _pref = await SharedPreferences.getInstance();
    return this;
  }

  static Future setString(String key, String value) async {
    await _pref.setString(key, value);
  }

  static Future setInt(String key, int value) async {
    await _pref.setInt(key, value);
  }

  static Future setBool(String key, bool value) async {
    await _pref.setBool(key, value);
  }

  static Future setDouble(String key, double value) async {
    await _pref.setDouble(key, value);
  }

  static Future setStringList(String key, List<String> value) async {
    await _pref.setStringList(key, value);
  }

  static getString(String key) {
    _pref.getString(key);
  }

  static getInt(String key) {
    _pref.getInt(key);
  }

  static getBool(String key) {
    _pref.getBool(key);
  }

  static getDouble(String key) {
    _pref.getDouble(key);
  }

  static getStringList(String key) {
    _pref.getStringList(key);
  }
}


# From your main.dart file

void main() {
  initServices();
  runApp(MyApp());
}

initServices() async {
  await Get.putAsync(() => SharedPref().init());
}