# CallbackRegistry.NotifierCallback

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

# CallbackRegistry.NotifierCallback

`
public
static

abstract
class
CallbackRegistry.NotifierCallback
`  
`

extends `[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.NotifierCallback\<C, T, A\> |

<br />

*** ** * ** ***

Class used to notify events from CallbackRegistry.

## Summary

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

|                                                                                                                                                                                                    ### Public methods                                                                                                                                                                                                     ||
|------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` abstract void` | ` `[onNotifyCallback](https://developer.android.com/reference/android/databinding/CallbackRegistry.NotifierCallback#onNotifyCallback(C, T, int, A))`(C callback, T sender, int arg, A arg2) ` Called by CallbackRegistry during[notifyCallbacks(Object, int, Object)](https://developer.android.com/reference/android/databinding/CallbackRegistry#notifyCallbacks(T, int, A))} to notify the callback. |

| ### Inherited methods |
|-----------------------|---|
| [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/databinding/CallbackRegistry.NotifierCallback#)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

### CallbackRegistry.NotifierCallback

```
CallbackRegistry.NotifierCallback ()
```

<br />

<br />

## Public methods

### onNotifyCallback

```
void onNotifyCallback (C callback, 
                T sender, 
                int arg, 
                A arg2)
```

Called by CallbackRegistry during[notifyCallbacks(Object, int, Object)](https://developer.android.com/reference/android/databinding/CallbackRegistry#notifyCallbacks(T, int, A))} to notify the callback.

<br />

|                                                                                        Parameters                                                                                         ||
|------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `callback` | `C`: The callback to notify. <br />                                                                                                                                           |
| `sender`   | `T`: The opaque sender object. <br />                                                                                                                                         |
| `arg`      | `int`: The opaque notification parameter. <br />                                                                                                                              |
| `arg2`     | `A`: An opaque argument passed in[notifyCallbacks(T, int, A)](https://developer.android.com/reference/android/databinding/CallbackRegistry#notifyCallbacks(T, int, A)) <br /> |

**See also:**

- [CallbackRegistry(CallbackRegistry.NotifierCallback)](https://developer.android.com/reference/android/databinding/CallbackRegistry#CallbackRegistry(android.databinding.CallbackRegistry.NotifierCallback<C, T, A>))  
-

  ## 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)