android入门之: SharedPreferences

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

get

methods must be treated as immutable by the application.