SharedPreferences的模式 mode

public abstract SharedPreferences getSharedPreferences (String name, int mode)

Since: API Level 1

Retrieve and hold the contents of the preferences file 'name', returning a SharedPreferences through which you can retrieve and modify its values. Only one instance of the SharedPreferences object is returned to any callers for the same name, meaning they will see each other's edits as soon as they are made.

Parameters

nameDesired preferences file. If a preferences file by this name does not exist, it will be created when you retrieve an editor (SharedPreferences.edit()) and then commit changes (Editor.commit()).modeOperating mode. Use 0 or MODE_PRIVATE for the default operation, MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE to control permissions. The bitMODE_MULTI_PROCESS can also be used if multiple processes are mutating the same SharedPreferences file. MODE_MULTI_PROCESS is always on in apps targetting Gingerbread (Android 2.3) and below, and off by default in later versions.

Returns

• Returns the single SharedPreferences instance that can be used to retrieve and modify the preference values.

See Also

• MODE_PRIVATE
• MODE_WORLD_READABLE
• MODE_WORLD_WRITEABLE
• MODE_MULTI_PROCESS

一般默认使用MODE_PRIVATE, 想在一态和二态之间进行传递参数的时候可以考虑使用 MODE_WORLD_READABLE | MODE_WORLD_WRITEABLE