Cobra - Android Quick Start

Platforms

• Android (5.0+)

Requirements

• Picovoice Account and AccessKey
• Android Studio
• Android device with USB debugging enabled or Android simulator

Picovoice Account & AccessKey

1. Login or signup for a free account on the Picovoice Console.
2. Go to the AccessKey tab to create one or use an existing AccessKey. Be sure to keep your AccessKey secret.

Quick Start

Setup

1. Install Android Studio.

2. Include mavenCentral() repository in the top-level build.gradle. Then add the following to the app's build.gradle:

dependencies {
    // ...
    implementation 'ai.picovoice:cobra-android:${LATEST_VERSION}' // replace with latest version
}

3. Add the following to the app's AndroidManifest.xml file to enable recording with an Android device's microphone:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

Usage

Create an instance of the Cobra VAD engine:

import ai.picovoice.cobra.Cobra;
import ai.picovoice.cobra.CobraException;

try {
    Cobra cobra = new Cobra("${ACCESS_KEY}");
} catch (CobraException e) { }

Pass in frames of audio to the .process function:

short[] getNextAudioFrame(){
    // .. get audioFrame
    return audioFrame;
}

while(true) {
    try {
        float voiceProbability = cobra.process(getNextAudioFrame());
        // take action based on probability of voice
    } catch (CobraException e) { }
}

Release resources explicitly when done with Cobra:

cobra.delete()

Demo

For the Cobra Android SDK, we offer demo applications that demonstrate how to use the VAD engine on real-time audio streams (i.e. microphone input).

Setup

Clone the Repository

git clone --recurse-submodules https://github.com/Picovoice/cobra.git

Usage

1. Open the Android Activity demo using Android Studio.

2. Copy your AccessKey from Picovoice Console into the ACCESS_KEY variable in MainActivity.java.

3. Run the application using a connected Android device or using an Android simulator.

For more information on our Cobra demos for Android, head over to our Github repository.

Resources

Packages

• cobra-android on Maven Central

API

• cobra-android API Docs

GitHub

• Cobra Android SDK on GitHub
• Cobra Android Demos on GitHub

Benchmark

• Voice Activity Benchmark

Further Reading

• Yet Another Voice Activity Detection Engine