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public static abstract class ObservableMap.OnMapChangedCallback
extends Object

java.lang.Object
	android.databinding.ObservableMap.OnMapChangedCallback<T extends android.databinding.ObservableMap<K, V>, K, V>

ObservableMap更改时接收通知的回调。

Public constructors
`ObservableMap.OnMapChangedCallback()`

公共方法(Public methods)
`abstract void`	`onMapChanged(T sender, K key)` 每当ObservableMap发生变化时调用，包括插入，删除和更改的值。

From class java.lang.Object

ObservableMap.OnMapChangedCallback ()

void onMapChanged (T sender, 
                K key)

每当ObservableMap发生变化时调用，包括插入，删除和更改的值。

参数(Parameters)
`sender`	`T`: The changing map.
`key`	`K`: The key of the value inserted, removed, or changed.