Added in API level 1
Observer
interface Observer
| java.util.Observer |
A class can implement the Observer interface when it wants to be informed of changes in observable objects.
Summary
| Public methods | |
|---|---|
| abstract Unit |
update(o: Observable!, arg: Any!)This method is called whenever the observed object is changed. |
Public methods
update
Added in API level 1
abstract fun update(
o: Observable!,
arg: Any!
): Unit
This method is called whenever the observed object is changed. An application calls an Observable object's notifyObservers method to have all the object's observers notified of the change.
| Parameters | |
|---|---|
o |
Observable!: the observable object. |
arg |
Any!: an argument passed to the notifyObservers method. |