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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
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| import 'dart:async'; | ||
| import 'package:shared_preferences/shared_preferences.dart'; | ||
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| /// | ||
| /// 用来做shared_preferences的存储 | ||
| class SpUtil { | ||
| static SpUtil _instance; | ||
| static Future<SpUtil> get instance async { | ||
| return await _getInstance(); | ||
| } | ||
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| static SharedPreferences _spf; | ||
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| SpUtil._(); | ||
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| Future _init() async { | ||
| _spf = await SharedPreferences.getInstance(); | ||
| } | ||
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| static Future<SpUtil> _getInstance() async { | ||
| if (_instance == null) { | ||
| _instance = new SpUtil._(); | ||
| await _instance._init(); | ||
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| } | ||
| return _instance; | ||
| } | ||
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| static bool _beforCheck() { | ||
| String a; | ||
| if (_spf == null) { | ||
| return throw new StateError("SharedPreferences must be initialized first, but the insurance is null;"); | ||
| } | ||
| } | ||
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| static Set<String> getKeys() { | ||
| if (_beforCheck()) return null; | ||
| return _spf.getKeys(); | ||
| } | ||
| dynamic get(String key) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.getKeys(); | ||
| } | ||
| static String getString(String key) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.getString(key); | ||
| } | ||
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| static Future<bool> putString(String key, String value) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.setString(key, value); | ||
| } | ||
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| static bool getBool(String key) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.getBool(key); | ||
| } | ||
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| static Future<bool> putBool(String key, bool value) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.setBool(key, value); | ||
| } | ||
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| static int getInt(String key) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.getInt(key); | ||
| } | ||
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| static Future<bool> putInt(String key, int value) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.setInt(key, value); | ||
| } | ||
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| static double getDouble(String key) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.getDouble(key); | ||
| } | ||
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| static Future<bool> putDouble(String key, double value) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.setDouble(key, value); | ||
| } | ||
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| static List<String> getStringList(String key) { | ||
| return _spf.getStringList(key); | ||
| } | ||
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| static Future<bool> putStringList(String key, List<String> value) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.setStringList(key, value); | ||
| } | ||
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| static dynamic getDynamic(String key) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.get(key); | ||
| } | ||
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| static Future<bool> remove(String key) { | ||
| if (_beforCheck()) return null; | ||
| return _spf.remove(key); | ||
| } | ||
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| static Future<bool> clear() { | ||
| if (_beforCheck()) return null; | ||
| return _spf.clear(); | ||
| } | ||
| } |