import 'dart:convert'; import 'package:shared_preferences/shared_preferences.dart'; class Logs{ static save(String log){ SharedPreferences.getInstance().then((_prefs) async{ var jsonString = _prefs.getString("LOG") ?? "[]"; var list = json.decode(jsonString) as List; list.add("Running... ${DateTime.now()}"); _prefs.setString("LOG", json.encode(list)); }); } }