Android APIs
Added in API level 21



AlwaysOnHotwordDetector A class that lets a VoiceInteractionService implementation interact with always-on keyphrase detection APIs. 
AlwaysOnHotwordDetector.Callback Callbacks for always-on hotword detection. 
AlwaysOnHotwordDetector.EventPayload Additional payload for onDetected(AlwaysOnHotwordDetector.EventPayload)
VoiceInteractionService Top-level service of the current global voice interactor, which is providing support for hotwording etc. 
VoiceInteractionSession An active interaction session, started by a VoiceInteractionService
VoiceInteractionSessionService An active voice interaction session, initiated by a VoiceInteractionService