这个项目兼容的系统的SharedPreferences，只是更改了系统SharedPreferences的Context.MODE_MULTI_PROCESS的mode的实现， 使用了ContentProvider配合Context.MODE_PRIVATE的SharedPreferences来进行跨进程存取数据， 顺便改掉了Context.MODE_MULTI_PROCESS的mode的registerOnSharedPreferenceChangeListener的实现， 以避免注册回调后可能会不执行回调的问题。
更加详细描述请参考：我的博客
ps：使用了registerOnSharedPreferenceChangeListener一定要记得使用对应的unregisterOnSharedPreferenceChangeListener，否则会造成内存泄露！
This project is compatible with ContextImpl's SharedPreferences, just changing the implementation of ContextImpl's SharedPreferences Context.MODE_MULTI_PROCESS mode. Use ContentProvider with Context.MODE_PRIVATE's SharedPreferences to access data across processes. By the way, the implementation of the registerOnSharedPreferenceChangeListener of the mode of Context.MODE_MULTI_PROCESS is changed. To avoid the problem of callbacks being executed after the callback is registered.
For a more detailed description, please refer to: My blog
ps:Use registerOnSharedPreferenceChangeListener must remember to use the corresponding unregisterOnSharedPreferenceChangeListener, otherwise it will cause memory leaks!