# android.arch.lifecycle added in[version 1.1.0](https://developer.android.com/topic/libraries/support-library/revisions) # android.arch.lifecycle | The`android.arch`Architecture Components packages are no longer maintained. They have been superseded by the corresponding[androidx.\*](https://developer.android.com/jetpack/androidx/migrate)packages. See[androidx.lifecycle](https://developer.android.com/reference/androidx/lifecycle/package-summary)instead. ## Annotations |-----------------------------------------------------------------------------------------------------|---| | [OnLifecycleEvent](https://developer.android.com/reference/android/arch/lifecycle/OnLifecycleEvent) | | ## Interfaces |-----------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [DefaultLifecycleObserver](https://developer.android.com/reference/android/arch/lifecycle/DefaultLifecycleObserver) | Callback interface for listening to[LifecycleOwner](https://developer.android.com/reference/android/arch/lifecycle/LifecycleOwner)state changes. | | [LifecycleObserver](https://developer.android.com/reference/android/arch/lifecycle/LifecycleObserver) | Marks a class as a LifecycleObserver. | | [LifecycleOwner](https://developer.android.com/reference/android/arch/lifecycle/LifecycleOwner) | A class that has an Android lifecycle. | | [LifecycleRegistryOwner](https://developer.android.com/reference/android/arch/lifecycle/LifecycleRegistryOwner) | *This interface was deprecated in API level 1.1.0. Use`android.support.v7.app.AppCompatActivity`which extends[LifecycleOwner](https://developer.android.com/reference/android/arch/lifecycle/LifecycleOwner), so there are no use cases for this class.* | | [Observer](https://developer.android.com/reference/android/arch/lifecycle/Observer)\ | A simple callback that can receive from[LiveData](https://developer.android.com/reference/android/arch/lifecycle/LiveData). | | [ViewModelProvider.Factory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.Factory) | Implementations of`Factory`interface are responsible to instantiate ViewModels. | | [ViewModelStoreOwner](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStoreOwner) | A scope that owns[ViewModelStore](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStore). | ## Classes |-------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [AndroidViewModel](https://developer.android.com/reference/android/arch/lifecycle/AndroidViewModel) | Application context aware[ViewModel](https://developer.android.com/reference/android/arch/lifecycle/ViewModel). | | [Lifecycle](https://developer.android.com/reference/android/arch/lifecycle/Lifecycle) | Defines an object that has an Android Lifecycle. | | [LifecycleRegistry](https://developer.android.com/reference/android/arch/lifecycle/LifecycleRegistry) | An implementation of[Lifecycle](https://developer.android.com/reference/android/arch/lifecycle/Lifecycle)that can handle multiple observers. | | [LifecycleService](https://developer.android.com/reference/android/arch/lifecycle/LifecycleService) | A Service that is also a[LifecycleOwner](https://developer.android.com/reference/android/arch/lifecycle/LifecycleOwner). | | [LiveData](https://developer.android.com/reference/android/arch/lifecycle/LiveData)\ | LiveData is a data holder class that can be observed within a given lifecycle. | | [LiveDataReactiveStreams](https://developer.android.com/reference/android/arch/lifecycle/LiveDataReactiveStreams) | Adapts[LiveData](https://developer.android.com/reference/android/arch/lifecycle/LiveData)input and output to the ReactiveStreams spec. | | [MediatorLiveData](https://developer.android.com/reference/android/arch/lifecycle/MediatorLiveData)\ | [LiveData](https://developer.android.com/reference/android/arch/lifecycle/LiveData)subclass which may observe other`LiveData`objects and react on`OnChanged`events from them. | | [MutableLiveData](https://developer.android.com/reference/android/arch/lifecycle/MutableLiveData)\ | [LiveData](https://developer.android.com/reference/android/arch/lifecycle/LiveData)which publicly exposes[setValue(T)](https://developer.android.com/reference/android/arch/lifecycle/MutableLiveData#setValue(T))and[postValue(T)](https://developer.android.com/reference/android/arch/lifecycle/MutableLiveData#postValue(T))method. | | [ProcessLifecycleOwner](https://developer.android.com/reference/android/arch/lifecycle/ProcessLifecycleOwner) | Class that provides lifecycle for the whole application process. | | [ServiceLifecycleDispatcher](https://developer.android.com/reference/android/arch/lifecycle/ServiceLifecycleDispatcher) | Helper class to dispatch lifecycle events for a service. | | [Transformations](https://developer.android.com/reference/android/arch/lifecycle/Transformations) | Transformations for a[LiveData](https://developer.android.com/reference/android/arch/lifecycle/LiveData)class. | | [ViewModel](https://developer.android.com/reference/android/arch/lifecycle/ViewModel) | ViewModel is a class that is responsible for preparing and managing the data for an[Activity](https://developer.android.com/reference/android/app/Activity.html)or a[Fragment](https://developer.android.com/reference/android/support/v4/app/Fragment). | | [ViewModelProvider](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider) | An utility class that provides`ViewModels`for a scope. | | [ViewModelProvider.AndroidViewModelFactory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.AndroidViewModelFactory) | [ViewModelProvider.Factory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.Factory)which may create[AndroidViewModel](https://developer.android.com/reference/android/arch/lifecycle/AndroidViewModel)and[ViewModel](https://developer.android.com/reference/android/arch/lifecycle/ViewModel), which have an empty constructor. | | [ViewModelProvider.NewInstanceFactory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.NewInstanceFactory) | Simple factory, which calls empty constructor on the give class. | | [ViewModelProviders](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProviders) | Utilities methods for[ViewModelStore](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStore)class. | | [ViewModelProviders.DefaultFactory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProviders.DefaultFactory) | *This class was deprecated in API level 1.1.0. Use[ViewModelProvider.AndroidViewModelFactory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.AndroidViewModelFactory)* | | [ViewModelStore](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStore) | Class to store`ViewModels`. | | [ViewModelStores](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStores) | Factory methods for[ViewModelStore](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStore)class. | ## Enums |---------------------------------------------------------------------------------------------------|-------------------| | [Lifecycle.Event](https://developer.android.com/reference/android/arch/lifecycle/Lifecycle.Event) | | | [Lifecycle.State](https://developer.android.com/reference/android/arch/lifecycle/Lifecycle.State) | Lifecycle states. | - ## Annotations - [OnLifecycleEvent](https://developer.android.com/reference/android/arch/lifecycle/OnLifecycleEvent) - ## Interfaces - [DefaultLifecycleObserver](https://developer.android.com/reference/android/arch/lifecycle/DefaultLifecycleObserver) - [LifecycleObserver](https://developer.android.com/reference/android/arch/lifecycle/LifecycleObserver) - [LifecycleOwner](https://developer.android.com/reference/android/arch/lifecycle/LifecycleOwner) - [LifecycleRegistryOwner](https://developer.android.com/reference/android/arch/lifecycle/LifecycleRegistryOwner) - [Observer](https://developer.android.com/reference/android/arch/lifecycle/Observer) - [ViewModelProvider.Factory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.Factory) - [ViewModelStoreOwner](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStoreOwner) - ## Classes - [AndroidViewModel](https://developer.android.com/reference/android/arch/lifecycle/AndroidViewModel) - [Lifecycle](https://developer.android.com/reference/android/arch/lifecycle/Lifecycle) - [LifecycleRegistry](https://developer.android.com/reference/android/arch/lifecycle/LifecycleRegistry) - [LifecycleService](https://developer.android.com/reference/android/arch/lifecycle/LifecycleService) - [LiveData](https://developer.android.com/reference/android/arch/lifecycle/LiveData) - [LiveDataReactiveStreams](https://developer.android.com/reference/android/arch/lifecycle/LiveDataReactiveStreams) - [MediatorLiveData](https://developer.android.com/reference/android/arch/lifecycle/MediatorLiveData) - [MutableLiveData](https://developer.android.com/reference/android/arch/lifecycle/MutableLiveData) - [ProcessLifecycleOwner](https://developer.android.com/reference/android/arch/lifecycle/ProcessLifecycleOwner) - [ServiceLifecycleDispatcher](https://developer.android.com/reference/android/arch/lifecycle/ServiceLifecycleDispatcher) - [Transformations](https://developer.android.com/reference/android/arch/lifecycle/Transformations) - [ViewModel](https://developer.android.com/reference/android/arch/lifecycle/ViewModel) - [ViewModelProvider](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider) - [ViewModelProvider.AndroidViewModelFactory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.AndroidViewModelFactory) - [ViewModelProvider.NewInstanceFactory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProvider.NewInstanceFactory) - [ViewModelProviders](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProviders) - [ViewModelProviders.DefaultFactory](https://developer.android.com/reference/android/arch/lifecycle/ViewModelProviders.DefaultFactory) - [ViewModelStore](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStore) - [ViewModelStores](https://developer.android.com/reference/android/arch/lifecycle/ViewModelStores) - ## Enums - [Lifecycle.Event](https://developer.android.com/reference/android/arch/lifecycle/Lifecycle.Event) - [Lifecycle.State](https://developer.android.com/reference/android/arch/lifecycle/Lifecycle.State)