Getting Started

Getting Started with DAT SDK (Android)

Set up the Meta Wearables Device Access Toolkit in an Android app.

Prerequisites

• Android Studio Flamingo or newer
• Android 10+ test device with the Meta AI app installed
• Supported Meta glasses or MockDeviceKit for local testing
• Developer Mode enabled in the Meta AI app for development builds
• GitHub personal access token with read:packages scope

Step 1: Add the Maven repository

In settings.gradle.kts:

val localProperties =
    Properties().apply {
        val localPropertiesPath = rootDir.toPath() / "local.properties"
        if (localPropertiesPath.exists()) {
            load(localPropertiesPath.inputStream())
        }
    }

dependencyResolutionManagement {
    repositories {
        google()
        mavenCentral()
        maven {
            url = uri("https://maven.pkg.github.com/facebook/meta-wearables-dat-android")
            credentials {
                username = ""
                password = System.getenv("GITHUB_TOKEN") ?: localProperties.getProperty("github_token")
            }
        }
    }
}

Step 2: Declare dependencies

In libs.versions.toml:

[versions]
mwdat = "0.7.0"

[libraries]
mwdat-core = { group = "com.meta.wearable", name = "mwdat-core", version.ref = "mwdat" }
mwdat-camera = { group = "com.meta.wearable", name = "mwdat-camera", version.ref = "mwdat" }
mwdat-mockdevice = { group = "com.meta.wearable", name = "mwdat-mockdevice", version.ref = "mwdat" }

In app/build.gradle.kts:

dependencies {
    implementation(libs.mwdat.core)
    implementation(libs.mwdat.camera)
    implementation(libs.mwdat.mockdevice)
}

Step 3: Configure AndroidManifest.xml

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

    <application ...>
        <meta-data
            android:name="com.meta.wearable.mwdat.APPLICATION_ID"
            android:value="0" />

        <activity android:name=".MainActivity" ...>
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />
                <data android:scheme="myexampleapp" />
            </intent-filter>
        </activity>
    </application>
</manifest>

Use 0 for APPLICATION_ID in Developer Mode. Replace myexampleapp with your app's URL scheme.

Step 4: Initialize the SDK

import com.meta.wearable.dat.core.Wearables

class MyApplication : Application() {
    override fun onCreate() {
        super.onCreate()
        Wearables.initialize(this)
            .onFailure { error, _ -> error("Failed to initialize DAT: ${error.description}") }
    }
}

Step 5: Register and create a session

import com.meta.wearable.dat.core.Wearables
import com.meta.wearable.dat.core.selectors.AutoDeviceSelector

fun connect(activity: Activity) {
    Wearables.startRegistration(activity)
}

fun startSession() {
    val session = Wearables.createSession(AutoDeviceSelector()).getOrElse { error ->
        throw IllegalStateException(error.description)
    }

    session.start()
}

Observe registration and available devices:

lifecycleScope.launch {
    Wearables.registrationState.collect { state ->
        // Update registration UI
    }
}

lifecycleScope.launch {
    Wearables.devices.collect { devices ->
        // Update the device list
    }
}

Step 6: Add camera streaming

import com.meta.wearable.dat.camera.addStream
import com.meta.wearable.dat.camera.types.StreamConfiguration
import com.meta.wearable.dat.camera.types.VideoQuality

val stream = session.addStream(
    StreamConfiguration(videoQuality = VideoQuality.MEDIUM, frameRate = 24),
).getOrElse { error ->
    throw IllegalStateException(error.description)
}

stream.start().onFailure { error, _ ->
    throw IllegalStateException(error.description)
}

Next steps

• Camera Streaming — Stream capability, video frames, photo capture
• MockDevice Testing — Test without hardware
• Session Lifecycle — Handle session and stream state changes
• Permissions — Registration and permission flows
• Full Android API reference