add sp

lib/utils/shared_preferences.dart

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