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 = "0.8.0"

[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-display = { group = "com.meta.wearable", name = "mwdat-display", version.ref = "mwdat" }
mwdat-mockdevice = { group = "com.meta.wearable", name = "mwdat-mockdevice", version.ref = "mwdat" }

In app/build.gradle.kts:

android {
    defaultConfig {
        manifestPlaceholders["mwdat_application_id"] = "0"
        manifestPlaceholders["mwdat_client_token"] = "0"
    }
}

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

Step 3: Configure AndroidManifest.xml

<manifest ...>
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <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="${mwdat_application_id}" />
        <meta-data
            android:name="com.meta.wearable.mwdat.CLIENT_TOKEN"
            android:value="${mwdat_client_token}" />

        <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>

APPLICATION_ID and CLIENT_TOKEN are used for app attestation and can be found in the Wearables Developer Center. In Developer Mode, attestation is not used, so the manifest placeholders can both be 0. For production, replace both placeholders with the credentials for your Wearables Developer Center app. 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