# MapChangeRegistry

Summary:[Ctors](https://developer.android.com/reference/android/databinding/MapChangeRegistry#pubctors)\|[Methods](https://developer.android.com/reference/android/databinding/MapChangeRegistry#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/databinding/MapChangeRegistry#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/databinding/MapChangeRegistry#)  

# MapChangeRegistry

`
public


class
MapChangeRegistry
`  
`


``

extends `[CallbackRegistry](https://developer.android.com/reference/android/databinding/CallbackRegistry)`<`[OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback)`, `[ObservableMap](https://developer.android.com/reference/android/databinding/ObservableMap)`, `[Object](http://developer.android.com/reference/java/lang/Object.html)`>


``


`

|---|---|---------------------------------------|
| [java.lang.Object](http://developer.android.com/reference/java/lang/Object.html) |||
| ↳ | [android.databinding.CallbackRegistry](https://developer.android.com/reference/android/databinding/CallbackRegistry)\<[android.databinding.ObservableMap.OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback),[android.databinding.ObservableMap](https://developer.android.com/reference/android/databinding/ObservableMap),[java.lang.Object](http://developer.android.com/reference/java/lang/Object.html)\> ||
|   | ↳ | android.databinding.MapChangeRegistry |

<br />

*** ** * ** ***

Utility class for managing ObservableMap callbacks.

## Summary

|                                                      ### Public constructors                                                      ||
|--------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[MapChangeRegistry](https://developer.android.com/reference/android/databinding/MapChangeRegistry#MapChangeRegistry())`() ` |

|                                                                                                                                                                                                                  ### Public methods                                                                                                                                                                                                                  ||
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` void` | ` `[notifyChange](https://developer.android.com/reference/android/databinding/MapChangeRegistry#notifyChange(android.databinding.ObservableMap, java.lang.Object))`(`[ObservableMap](https://developer.android.com/reference/android/databinding/ObservableMap)` sender, `[Object](http://developer.android.com/reference/java/lang/Object.html)` key) ` Notifies registered callbacks that an element has been added, removed, or changed. |

| ### Inherited methods |
|-----------------------|---|
| [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/databinding/MapChangeRegistry#)From class` `[android.databinding.CallbackRegistry](https://developer.android.com/reference/android/databinding/CallbackRegistry)` ` |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` void`                                                                                                                                                                                                                                                                                                                                                                                                 | ` `[add](https://developer.android.com/reference/android/databinding/CallbackRegistry#add(C))`(`[OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback)` callback) ` Add a callback to be notified.                                                                                                                                                  | | ` void`                                                                                                                                                                                                                                                                                                                                                                                                 | ` `[clear](https://developer.android.com/reference/android/databinding/CallbackRegistry#clear())`() ` Removes all callbacks from the list.                                                                                                                                                                                                                                                                          | | ` `[CallbackRegistry](https://developer.android.com/reference/android/databinding/CallbackRegistry)`<`[OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback)`, `[ObservableMap](https://developer.android.com/reference/android/databinding/ObservableMap)`, `[Object](http://developer.android.com/reference/java/lang/Object.html)`>` | ` `[clone](https://developer.android.com/reference/android/databinding/CallbackRegistry#clone())`() `                                                                                                                                                                                                                                                                                                               | | ` `[ArrayList](http://developer.android.com/reference/java/util/ArrayList.html)`<`[OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback)`>`                                                                                                                                                                                             | ` `[copyCallbacks](https://developer.android.com/reference/android/databinding/CallbackRegistry#copyCallbacks())`() ` Makes a copy of the registered callbacks and returns it.                                                                                                                                                                                                                                      | | ` void`                                                                                                                                                                                                                                                                                                                                                                                                 | ` `[copyCallbacks](https://developer.android.com/reference/android/databinding/CallbackRegistry#copyCallbacks(java.util.List<C>))`(`[List](http://developer.android.com/reference/java/util/List.html)`<`[OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback)`> callbacks) ` Modifies`callbacks`to contain all callbacks in the CallbackRegistry. | | ` boolean`                                                                                                                                                                                                                                                                                                                                                                                              | ` `[isEmpty](https://developer.android.com/reference/android/databinding/CallbackRegistry#isEmpty())`() ` Returns true if there are no registered callbacks or false otherwise.                                                                                                                                                                                                                                     | | ` void`                                                                                                                                                                                                                                                                                                                                                                                                 | ` `[notifyCallbacks](https://developer.android.com/reference/android/databinding/CallbackRegistry#notifyCallbacks(T, int, A))`(`[ObservableMap](https://developer.android.com/reference/android/databinding/ObservableMap)` sender, int arg, `[Object](http://developer.android.com/reference/java/lang/Object.html)` arg2) ` Notify all callbacks.                                                                 | | ` void`                                                                                                                                                                                                                                                                                                                                                                                                 | ` `[remove](https://developer.android.com/reference/android/databinding/CallbackRegistry#remove(C))`(`[OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback)` callback) ` Remove a callback.                                                                                                                                                        | ||
| [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/databinding/MapChangeRegistry#)From class` `[java.lang.Object](http://developer.android.com/reference/java/lang/Object.html)` ` |------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------| | ` `[Object](http://developer.android.com/reference/java/lang/Object.html)          | ` clone() `                                                                               | | ` boolean`                                                                         | ` equals(`[Object](http://developer.android.com/reference/java/lang/Object.html)` arg0) ` | | ` void`                                                                            | ` finalize() `                                                                            | | ` final `[Class](http://developer.android.com/reference/java/lang/Class.html)`<?>` | ` getClass() `                                                                            | | ` int`                                                                             | ` hashCode() `                                                                            | | ` final void`                                                                      | ` notify() `                                                                              | | ` final void`                                                                      | ` notifyAll() `                                                                           | | ` `[String](http://developer.android.com/reference/java/lang/String.html)          | ` toString() `                                                                            | | ` final void`                                                                      | ` wait(long arg0, int arg1) `                                                             | | ` final void`                                                                      | ` wait(long arg0) `                                                                       | | ` final void`                                                                      | ` wait() `                                                                                | ||

## Public constructors

### MapChangeRegistry

```
MapChangeRegistry ()
```

<br />

<br />

## Public methods

### notifyChange

```
void notifyChange (ObservableMap sender, 
                Object key)
```

Notifies registered callbacks that an element has been added, removed, or changed.

<br />

|                           Parameters                            ||
|----------|-------------------------------------------------------|
| `sender` | `ObservableMap`: The map that has changed. <br />     |
| `key`    | `Object`: The key of the element that changed. <br /> |

-

  ## Annotations

  - [Bindable](https://developer.android.com/reference/android/databinding/Bindable)
  - [BindingAdapter](https://developer.android.com/reference/android/databinding/BindingAdapter)
  - [BindingConversion](https://developer.android.com/reference/android/databinding/BindingConversion)
  - [BindingMethod](https://developer.android.com/reference/android/databinding/BindingMethod)
  - [BindingMethods](https://developer.android.com/reference/android/databinding/BindingMethods)
  - [InverseBindingAdapter](https://developer.android.com/reference/android/databinding/InverseBindingAdapter)
  - [InverseBindingMethod](https://developer.android.com/reference/android/databinding/InverseBindingMethod)
  - [InverseBindingMethods](https://developer.android.com/reference/android/databinding/InverseBindingMethods)
  - [InverseMethod](https://developer.android.com/reference/android/databinding/InverseMethod)
-

  ## Interfaces

  - [DataBindingComponent](https://developer.android.com/reference/android/databinding/DataBindingComponent)
  - [InverseBindingListener](https://developer.android.com/reference/android/databinding/InverseBindingListener)
  - [Observable](https://developer.android.com/reference/android/databinding/Observable)
  - [ObservableList](https://developer.android.com/reference/android/databinding/ObservableList)
  - [ObservableMap](https://developer.android.com/reference/android/databinding/ObservableMap)
-

  ## Classes

  - [BaseObservable](https://developer.android.com/reference/android/databinding/BaseObservable)
  - [CallbackRegistry](https://developer.android.com/reference/android/databinding/CallbackRegistry)
  - [CallbackRegistry.NotifierCallback](https://developer.android.com/reference/android/databinding/CallbackRegistry.NotifierCallback)
  - [DataBindingUtil](https://developer.android.com/reference/android/databinding/DataBindingUtil)
  - [ListChangeRegistry](https://developer.android.com/reference/android/databinding/ListChangeRegistry)
  - [MapChangeRegistry](https://developer.android.com/reference/android/databinding/MapChangeRegistry)
  - [MergedDataBinderMapper](https://developer.android.com/reference/android/databinding/MergedDataBinderMapper)
  - [Observable.OnPropertyChangedCallback](https://developer.android.com/reference/android/databinding/Observable.OnPropertyChangedCallback)
  - [ObservableArrayList](https://developer.android.com/reference/android/databinding/ObservableArrayList)
  - [ObservableArrayMap](https://developer.android.com/reference/android/databinding/ObservableArrayMap)
  - [ObservableBoolean](https://developer.android.com/reference/android/databinding/ObservableBoolean)
  - [ObservableByte](https://developer.android.com/reference/android/databinding/ObservableByte)
  - [ObservableChar](https://developer.android.com/reference/android/databinding/ObservableChar)
  - [ObservableDouble](https://developer.android.com/reference/android/databinding/ObservableDouble)
  - [ObservableField](https://developer.android.com/reference/android/databinding/ObservableField)
  - [ObservableFloat](https://developer.android.com/reference/android/databinding/ObservableFloat)
  - [ObservableInt](https://developer.android.com/reference/android/databinding/ObservableInt)
  - [ObservableList.OnListChangedCallback](https://developer.android.com/reference/android/databinding/ObservableList.OnListChangedCallback)
  - [ObservableLong](https://developer.android.com/reference/android/databinding/ObservableLong)
  - [ObservableMap.OnMapChangedCallback](https://developer.android.com/reference/android/databinding/ObservableMap.OnMapChangedCallback)
  - [ObservableParcelable](https://developer.android.com/reference/android/databinding/ObservableParcelable)
  - [ObservableShort](https://developer.android.com/reference/android/databinding/ObservableShort)
  - [OnRebindCallback](https://developer.android.com/reference/android/databinding/OnRebindCallback)
  - [PropertyChangeRegistry](https://developer.android.com/reference/android/databinding/PropertyChangeRegistry)
  - [ViewDataBinding](https://developer.android.com/reference/android/databinding/ViewDataBinding)
  - [ViewStubProxy](https://developer.android.com/reference/android/databinding/ViewStubProxy)