SharedPreferences应用经验

int

MODE_APPEND


File creation mode: for use with openFileOutput(String, int), if the file already exists then write data to the end of the existing file instead of erasing it.

int


MODE_MULTI_PROCESS

SharedPreference loading flag: when set, the file on disk will be checked for modification even if the shared preferences instance is already loaded in this process.

int

MODE_PRIVATE

File creation mode: the default mode, where the created file can only be accessed by the calling application (or all applications sharing the same user ID).

int
MODE_WORLD_READABLE

File creation mode: allow all other applications to have read access to the created file.

int

MODE_WORLD_WRITEABLE

File creation mode: allow all other applications to have write access to the created file.

1、对于SharedPreferences来说，应用MODE_APPEND是没有意义的，这个标记表示文件可以追加，即可以持续向一个txt琅绫擎写器械，而MODE_PRIVATE 活着其他  会覆盖文件
2、当应用这几种权限时，其他法度榜样拜访数据时启动本法度榜样修改文件数据，其他法度榜样获得的┞氛样缓存数据得不到最新的数据，其他法度榜样要想获得最新数据，本法度榜样在写文件时必须应用MODE_MULTI_PROCESS权限。
如不雅不经由过程创建Context拜访其他应用的preference，可以以攫取xml文件方法直接拜访其他应用preference对应的xml文件