60 lines
1.5 KiB
Dart
60 lines
1.5 KiB
Dart
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import 'package:shared_preferences/shared_preferences.dart';
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// 用法： AppSp().setString("key", "value");
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class AppSp {
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static SharedPreferences? _instance;
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static final String _basePrefix = "omiyo.";
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static Future<SharedPreferences>? _instanceFuture;
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static Future<SharedPreferences> getInstance() {
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if (_instance != null) {
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return Future.value(_instance);
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}
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// 确保并发情况下只初始化一次
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_instanceFuture ??= SharedPreferences.getInstance().then((prefs) {
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_instance = prefs;
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return prefs;
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});
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return _instanceFuture!;
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}
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void setString(String key, String value) async {
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final prefs = await getInstance();
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prefs.setString("$_basePrefix$key", value);
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}
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Future<String> getString(String key) async {
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final prefs = await getInstance();
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return prefs.getString("$_basePrefix$key") ?? '';
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}
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void setBool(String key, bool value) async {
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final prefs = await getInstance();
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prefs.setBool("$_basePrefix$key", value);
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}
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Future<bool> getBool(String key) async {
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final prefs = await getInstance();
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return prefs.getBool("$_basePrefix$key") ?? false;
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}
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void setInt(String key, int value) async {
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final prefs = await getInstance();
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prefs.setInt("$_basePrefix$key", value);
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}
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Future<int> getInt(String key) async {
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final prefs = await getInstance();
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return prefs.getInt("$_basePrefix$key") ?? 0;
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}
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void deleteKey(String key) async {
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final prefs = await getInstance();
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prefs.remove("$_basePrefix$key");
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}
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}
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