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android.support.v4.os

Support android.os classes to assist with development of applications for android API level 4 or later.

Interfaces

CancellationSignal.OnCancelListener Listens for cancellation. 
ParcelableCompatCreatorCallbacks<T> Callbacks a Parcelable creator should implement. 

Classes

AsyncTaskCompat Helper for accessing features in AsyncTask introduced after API level 4 in a backwards compatible fashion. 
BuildCompat BuildCompat contains additional platform version checking methods for testing compatibility with new features. 
CancellationSignal Static library support version of the framework's CancellationSignal
EnvironmentCompat Helper for accessing features in Environment introduced after API level 4 in a backwards compatible fashion. 
ParcelableCompat Helper for accessing features in Parcelable introduced after API level 4 in a backwards compatible fashion. 
TraceCompat Writes trace events to the system trace buffer. 
UserManagerCompat Helper for accessing features in UserManager introduced after API level 4 in a backwards compatible fashion. 

Exceptions

OperationCanceledException An exception type that is thrown when an operation in progress is canceled. 
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For more information about specifying the API level your app requires, read Supporting Different Platform Versions.