Files
flutter_first_station/lib/storage/sp_storage.dart
2023-05-14 22:25:40 +08:00

40 lines
875 B
Dart

import 'dart:convert';
import 'package:shared_preferences/shared_preferences.dart';
const String kGuessSpKey = 'guess-config';
class SpStorage {
SpStorage._();
static SpStorage? _storage;
static SpStorage get instance {
_storage = _storage ?? SpStorage._();
return _storage!;
}
SharedPreferences? _sp;
Future<void> initSpWhenNull() async {
if (_sp != null) return;
_sp = _sp ?? await SharedPreferences.getInstance();
}
Future<bool> saveGuessConfig({
bool? guessing,
int? value,
}) async {
await initSpWhenNull();
String content = json.encode({'guessing': guessing, 'value': value});
return _sp!.setString(kGuessSpKey, content);
}
Future<Map<String,dynamic>> readGuessConfig() async {
await initSpWhenNull();
String content = _sp!.getString(kGuessSpKey)??"{}";
return json.decode(content);
}
}