import 'package:flutter/foundation.dart'; import 'package:shared_preferences/shared_preferences.dart'; class StorageUtil { static Future setString(key, value) async { SharedPreferences sp = await SharedPreferences.getInstance(); sp.setString(key, value); } static Future getString(key) async { SharedPreferences sp = await SharedPreferences.getInstance(); var value = sp.getString(key); debugPrint(value.toString()); return value ?? ''; } static Future remove(key) async { SharedPreferences sp = await SharedPreferences.getInstance(); sp.remove(key); } static Future clear() async { SharedPreferences sp = await SharedPreferences.getInstance(); sp.clear(); } }