Introduction to Voice Interaction API (100 Days of Google Dev)

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Try the codelab at and submit custom voice action ideas at
Whether your app uses system or custom voice actions (), there might be times when the app would like to ask the user a follow-up question before performing the action. For example, after a music app launches when a user says “play some music”, it may want to ask the user “what genre?” Or when a home automation app hears the user say “OK Google, turn on the lights”, it might want to ask “which room?” The Voice Interaction API lets Android M apps ask follow-up questions like these.
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