Build voice bots for mobile with Dialogflow and Flutter
summary
Builds a working mobile FAQ voice bot that streams microphone audio from Flutter to Dialogflow and returns fulfillment text; uses a local service account JSON dropped into assets, the Dialogflow_grpc package, and the sound_stream plugin with sampleRate:16000 linear16 audio config for streamingDetectIntent. FAQs are scraped into a Dialogflow knowledge base (FAQ MIME type) and can be promoted to intents; warns that embedding service keys in the app is fast but needs rotation or backend protection for production.
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chapters (23)
- 0:00Intro
- 0:28Flutter
- 0:59Dialogflow
- 2:10Types of chat bots
- 2:57Why not use Google Assistant
- 3:25How to integrate Google Assistant
- 4:08How to integrate Dialogflow
- 7:23Multichannel architecture
- 8:15Demo
- 8:49Workshop overview
- 10:53Create a Dialogflow agent
- 12:48Create a service account
- 14:37Create a boilerplate application
- 18:38Add dependencies
- 24:20Creating the chat interface
- 24:55Creating the main file
- 25:50Dialogflow settings
- 29:50Testing in emulator
- 30:23Troubleshooting
- 31:13Improving the model
- 31:46Text to Speech
- 32:47Dialogflow Agent
- 34:35FAQ
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