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ASR/TTS Demo-Android Guide ​

demo-android is used to verify ASR/TTS SDK integration, connection setup, and call flows. In a private deployment, configure the Demo with the private domain, asrPath, ttsPath, AK/SK, and other required parameters to verify that the full speech chain is available.

1. Get the Demo project ​

After downloading, unzip the package and enter the online-speech-sdk-demo directory to build and debug.

2. Build and install ​

bash
cd online-speech-sdk-demo
./gradlew :demo-android:assembleDebug

APK output:

  • demo-android/build/outputs/apk/debug/demo-android-debug.apk

3. Configuration ​

The Demo reads the following values from online-speech-sdk-demo/gradle.properties by default:

  • online.demo.domain
  • online.demo.ak
  • online.demo.sk
  • online.demo.uid
  • online.demo.deviceId
  • online.demo.asrPath
  • online.demo.ttsPath

4. Pages ​

4.1 Initialization page ​

  • Init SDK (create clients): Create the SDK, ASR client, and TTS client.
  • Close SDK + Unbind: Release SDK resources and connections, and unbind the open-sdk service.

4.2 ASR page ​

  • connect(): Establish the ASR WebSocket.
  • startAsrWithMic(): Record through open-sdk and stream audio automatically.
  • stopAsrWithMic(): Stop recording and finish ASR.
  • close(): Close the ASR connection.

4.3 TTS page ​

  • connect(): Establish the TTS WebSocket.
  • speak(default text): Play the default test text.
  • stop(): Stop current TTS playback.
  • close(): Close the TTS connection.

5. Debug logs ​

  • Log area at the bottom of the page: latest logs appear at the top.
  • Logcat tags:
    • OnlineSpeechDemo
    • OpenSdkAudioSource
    • AndroidPcmTtsPlayer

Recommended filter:

bash
adb logcat | rg "OnlineSpeechDemo|OpenSdkAudioSource|AndroidPcmTtsPlayer"

6. FAQ ​

  • EACCES / Download/glass3Log: The Demo skips GlassSdk.registerClient() by default to avoid Android 12 public directory write permission issues.
  • No ASR result: make sure connect() is called before startAsrWithMic().
  • No TTS audio: make sure connect() is called, then check device volume and audio routing.