Products Google APIs for Android Reference CompletionListener public interface CompletionListener Known Indirect Subclasses DriveEventService DriveEventService Abstract base class for a bound service that handles all DriveEvent instances. Event listener interface for CompletionEvent. Public Method Summary abstract void onCompletion(CompletionEvent event) Public Methods public abstract void onCompletion (CompletionEvent event) Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated November 6, 2017.