$ ~/registry/skill/facebook-plugins-mwdat-android-skills-sample-app-guide

SKILL

sample-app-guide

Name: sample-app-guide
Author: facebook

Build a complete DAT app with sessions, camera streaming, and photo capture.

Stars

★ 314

Source

GitHub

Updated

2026-07-03

// securityCaution

Prompt only, no code
Open source
Community-trusted· 289

Summary

The material appears to be an open-source Android sample/guide with no required secrets or declared remote endpoints, so overall risk is low. It does describe camera streaming and photo saving, which implies device data access, but based on the provided facts this remains within the normal scope of a sample development guide.

CredentialsLow risk

The material explicitly states that no keys or environment variables are required, and the README does not show any API tokens, account secrets, or credential injection steps, so credential exposure and abuse risk appears low.

Network egressLow risk

System checks indicate no remote endpoints, and the material mainly describes local Android integration, session creation, and camera stream handling; while it mentions registration and sessions, there is no clear evidence of user data being sent to third-party services.

Code executionLow risk

This item is classified as prompt-only, and the material consists of development guidance and sample code snippets rather than directly executable install scripts or a local process launcher; no request for system execution privileges beyond the stated purpose is evident.

Data accessCaution

The README explicitly involves camera stream access and saving captured photos, indicating potential access to the camera and local storage/media data. This is consistent with the stated functionality, but actual permission requests and storage locations should still be reviewed.

Supply chainLow risk

The source is an open-source GitHub repository, with system labeling as open-source and some community adoption (289 stars), which are positive risk-reducing signals. The missing license declaration and unknown maintenance status add some uncertainty, but not enough to raise this to high risk based on the provided material.

Recommendations

Review AndroidManifest and runtime permissions before integration, granting only the camera/storage permissions that are strictly necessary.
Verify where photos are stored, how long they persist, and whether they sync to any other services to avoid unexpected data retention.
Pin dependency versions and review the added Maven repository and SDK provenance.
Check recent commits, issues, and releases in the repository to validate maintenance status.

Audited by: gpt-5.4 · 2026-06-17

// install

Copy the install command and let the AI configure it · recommended for beginners

Please install the "sample-app-guide" skill from askskill:
1. Download https://raw.githubusercontent.com/facebook/meta-wearables-dat-android/main/plugins/mwdat-android/skills/sample-app-guide/SKILL.md
2. Save it as ~/.claude/skills/sample-app-guide/SKILL.md
3. Reload skills and tell me it's ready

// download

Download SKILL.mdInstall manifest ↗

// examples

Build a DAT app prototype

Prompt

Guide me step by step to build a complete DAT app with session creation, camera video streaming, and photo capture saving, and provide the project structure and key code examples.

Expected

A step-by-step development guide with architecture notes, code snippets, and implementation order.

Troubleshoot camera integration

Prompt

I get a black screen when integrating camera streaming in my DAT app. Based on session initialization, permission requests, stream binding, and capture logic, list debugging steps and fixes.

Expected

A diagnostic checklist for the camera black screen issue, including common causes and fixes.

Generate photo capture sample code

Prompt

Generate sample code for photo capture in a DAT app that works with existing session and camera stream modules, and explain triggering capture, saving images, and error handling.

Expected

Integratable photo capture sample code with explanations of key interfaces, save flow, and error handling.

// docs

Sample App Guide (Android)

Build an Android DAT app with registration, sessions, camera streaming, and photo capture.

Pair this with the CameraAccess sample.

Project setup

Create an Android Studio app project.
Add the DAT Maven repository and dependencies.
Configure AndroidManifest.xml for registration callbacks and APPLICATION_ID.
Initialize Wearables in your Application.

Suggested app structure

app/src/main/java/com/example/myapp/
├── MyApplication.kt
├── MainActivity.kt
├── session/
│   └── SessionViewModel.kt
└── ui/
    ├── RegistrationScreen.kt
    └── CameraScreen.kt

Registration and session creation

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

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

    fun register() {
        Wearables.startRegistration(this)
    }
}

class SessionViewModel : ViewModel() {
    private var session: Session? = null
    private var stream: Stream? = null

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

        stream = createdSession.addStream(
            StreamConfiguration(videoQuality = VideoQuality.MEDIUM, frameRate = 24),
        ).getOrElse { error ->
            throw IllegalStateException(error.description)
        }.also { addedStream ->
            addedStream.start().getOrElse { error ->
                throw IllegalStateException(error.description)
            }
        }
    }
}

Observe frames and capture photos

viewModelScope.launch {
    stream?.videoStream?.collect { frame ->
        // Render preview
    }
}

fun capturePhoto() {
    viewModelScope.launch {
        stream?.capturePhoto()
            ?.onSuccess { photoData ->
                savePhoto(photoData.data)
            }
            ?.onFailure { error, _ ->
                showCaptureError(error.description)
            }
    }
}

Shutdown

fun stopCameraSession() {
    stream?.stop()
    session?.stop()
    stream = null
    session = null
}

Testing with MockDeviceKit

Use MockDeviceKit to simulate linking glasses, permission state, and camera media without physical hardware. See MockDevice Testing for setup details.

Record polished web app UI demo videos for walkthroughs, tutorials, and showcases.

affaan-mGet→

MCP

PMC App Dev Kit

Build, prototype, and debug MCP apps locally with UI support.

—Get→

$ loading_

Please install the "sample-app-guide" skill from askskill: 1. Download https://raw.githubusercontent.com/facebook/meta-wearables-dat-android/main/plugins/mwdat-android/skills/sample-app-guide/SKILL.md 2. Save it as ~/.claude/skills/sample-app-guide/SKILL.md 3. Reload skills and tell me it's ready

// examples

Build a DAT app prototype

Prompt

Guide me step by step to build a complete DAT app with session creation, camera video streaming, and photo capture saving, and provide the project structure and key code examples.

Expected

A step-by-step development guide with architecture notes, code snippets, and implementation order.

Troubleshoot camera integration

Prompt

I get a black screen when integrating camera streaming in my DAT app. Based on session initialization, permission requests, stream binding, and capture logic, list debugging steps and fixes.

Expected

A diagnostic checklist for the camera black screen issue, including common causes and fixes.

Generate photo capture sample code

Prompt

Generate sample code for photo capture in a DAT app that works with existing session and camera stream modules, and explain triggering capture, saving images, and error handling.

Expected

Integratable photo capture sample code with explanations of key interfaces, save flow, and error handling.

// docs

Sample App Guide (Android)

Build an Android DAT app with registration, sessions, camera streaming, and photo capture.

Pair this with the CameraAccess sample.

Project setup

Create an Android Studio app project.
Add the DAT Maven repository and dependencies.
Configure AndroidManifest.xml for registration callbacks and APPLICATION_ID.
Initialize Wearables in your Application.

Suggested app structure

app/src/main/java/com/example/myapp/
├── MyApplication.kt
├── MainActivity.kt
├── session/
│   └── SessionViewModel.kt
└── ui/
    ├── RegistrationScreen.kt
    └── CameraScreen.kt

Registration and session creation

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

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

    fun register() {
        Wearables.startRegistration(this)
    }
}

class SessionViewModel : ViewModel() {
    private var session: Session? = null
    private var stream: Stream? = null

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

        stream = createdSession.addStream(
            StreamConfiguration(videoQuality = VideoQuality.MEDIUM, frameRate = 24),
        ).getOrElse { error ->
            throw IllegalStateException(error.description)
        }.also { addedStream ->
            addedStream.start().getOrElse { error ->
                throw IllegalStateException(error.description)
            }
        }
    }
}

Observe frames and capture photos

viewModelScope.launch {
    stream?.videoStream?.collect { frame ->
        // Render preview
    }
}

fun capturePhoto() {
    viewModelScope.launch {
        stream?.capturePhoto()
            ?.onSuccess { photoData ->
                savePhoto(photoData.data)
            }
            ?.onFailure { error, _ ->
                showCaptureError(error.description)
            }
    }
}

Shutdown

fun stopCameraSession() {
    stream?.stop()
    session?.stop()
    stream = null
    session = null
}

Testing with MockDeviceKit

Use MockDeviceKit to simulate linking glasses, permission state, and camera media without physical hardware. See MockDevice Testing for setup details.

// examples

// docs

Sample App Guide (Android)

Project setup

Suggested app structure

Registration and session creation

Observe frames and capture photos

Shutdown

Testing with MockDeviceKit

Links

// from the same source

camera-streaming

session-lifecycle

debugging

permissions-registration

display-access

dat-conventions

// similar tools

sample-app-guide

camera-streaming

permissions-registration

dat-conventions

ui-demo

PMC App Dev Kit

// examples

// docs

Sample App Guide (Android)

Project setup

Suggested app structure

Registration and session creation

Observe frames and capture photos

Shutdown

Testing with MockDeviceKit

Links

// from the same source

camera-streaming

session-lifecycle

debugging

permissions-registration

display-access

dat-conventions

// similar tools

sample-app-guide

camera-streaming

permissions-registration

dat-conventions

ui-demo

PMC App Dev Kit