带有 MODE_PRIVATE、MODE_WORLD_READABLE、MODE_WORLD_WRITABLE 的 Android SharedPreferences

Question

Android 中的

SharedPreferences 是应用程序本地的，不会在不同应用程序之间共享。当我说

SharedPreferences preferences = getSharedPreferences(PREF_NAME, MODE_WORLD_READABLE);

设置此首选项 MODE_WORLD_READABLE、MODE_WORLD_WRITABLE 或 MODE_PRIVATE?

Answer 1

getSharedPreferences(String name, int mode) 解释here

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).

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

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

更多信息 here

编辑 从 API 17 开始，MODE_WORLD_READABLE 和 MODE_WORLD_WRITEABLE 已弃用:

This constant was deprecated in API level 17.
Creating world-readable files is very dangerous, and likely to cause security holes in applications. It is strongly discouraged; instead, applications should use more formal mechanism for interactions such as ContentProvider, BroadcastReceiver, and Service. There are no guarantees that this access mode will remain on a file, such as when it goes through a backup and restore.