读取数据:
保存数据:
+++++++++++++++++++方法详解++++++++++++++++++++++++++++++
SharedPreferences综述:
使用getSharedPreferences(String, int) 方法提供获取和修改preference的接口
对于任意指定的preferences集合, 所有的app共享同一个实例;
如果想要 修改preferces的话, 必须通过SharedPreferences.Editor 对象; 该对象可以保证preference状态一致而且可以控制存储;他的各种get方法的返回对象必须在整个程序中是不可变的;
使用方法http://wear.techbrood.com/guide/topics/data/data-storage.html#pref
摘要:
Interface for accessing and modifying preference data returned by getSharedPreferences(String, int). For any particular set of preferences, there is a single instance of this class that all clients share. Modifications to the preferences must go through an SharedPreferences.Editor object to ensure the preference values remain in a consistent state and control when they are committed to storage. Objects that are returned from the various getmethods must be treated as immutable by the application.