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key, (Boolean) object); 40 }else if (object instanceof Float){ 41 editor.putFloat(key, (Float) object); 42 }else if (object instanceof Integer){ 43 editor.putInt(key, (Integer) object); 44 }else if (object instanceof Long){ 45 editor.putLong(key, (Long) object); 46 }else if (object instanceof String){ 47 editor.putString(key, (String) object); 48 } 49 editor.apply(); 50 } 51
52 /**
53 * 获取指定数据 54 */
55 public static Object getData(Context context, String key, Object object){ 56 //实例化SharedPreferences对象（第一步）
57 SharedPreferences sp = context.getSharedPreferences(FILE_NAME, context.MODE_PRIVATE); 58 //用getObject的方法保存数据，取决于第三个参数你使用的什么类型的变量(第二步)
59 if (object instanceof Boolean){ 60 return sp.getBoolean(key, (Boolean) object); 61 }else if (object instanceof Float){ 62 return sp.getFloat(key, (Float) object); 63 }else if (object instanceof Integer){ 64 return sp.getInt(key, (Integer) object); 65 }else if (object instanceof Long){ 66 return sp.getLong(key, (Long) object); 67 }else if (object instanceof String){ 68 return sp.getString(key, (String) object); 69 } 70 return null; 71 } 72
73 /**
74 * 返回所有的键值对 75 */
76 public static Map<String, ?> getAll(Context context){ 77 SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); 78 Map<String, ?> map = sp.getAll(); 79 return map; 80 } 81
82 /**
83 * 检查对应的数据是否存在 84 */
85 public static boolean contains(Context context, String key){ 86 SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); 87 return sp.contains(key); 88 } 89
90 /**
91 * 删除指定key值的数据 92 */
93 public static void remove(Context context, String key){ 94 SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); 95 SharedPreferences.Editor editor = sp.edit(); 96 editor.remove(key); 97 editor.apply(); 98 } 99
100 /**
101 * 删除所有的数据 102 */
103 public static void clear(Context context, String key){ 104 SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); 105 SharedPreferences.Editor editor = sp.edit(); 106 editor.clear(); 107 editor.apply(); 108 } 109
110 }
版权声明：本文为博主原创文章，转载请附上原文出处链接和本声明。2019-08-28，17:41:40。
作者By-----溺心与沉浮----博客园
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