程序包 ohos.data.preferences

接口 Preferences.PreferencesObserver

封闭接口:

Preferences

public static interface Preferences.PreferencesObserver

Provides an interface to listen for preference data changes.

The observer of Preferences must implement the PreferencesObserver interface. You can use the Preferences#registerObserver method to register an observer for the Preferences object, and use the Preferences#unregisterObserver method to unregister the observer.

从以下版本开始:

1

方法概要

限定符和类型	方法	说明
void	onChange(Preferences preferences, String key)	Observes the change of a certain preference.

方法详细资料

onChange

void onChange(Preferences preferences,
              String key)

Observes the change of a certain preference.

参数:

preferences - Indicates the changed Preferences object.

key - Indicates the key of the changed preference.

从以下版本开始:

1