Add AI glasses projected snippets #751

trambui09 · 2025-12-22T23:30:22Z

Include:

Create glasses activity
Launching a glasses activity in a phone main activity
Gate launch of glasses activity via ProjectedContext.isProjectedDeviceConnected() method

… a glasses activity

snippet-bot · 2025-12-22T23:30:26Z

Here is the summary of changes.

You are about to add 3 region tags.

xr/src/main/java/com/example/xr/projected/GlassesMainActivity.kt:40, tag androidxr_projected_ai_glasses_activity
xr/src/main/java/com/example/xr/projected/GlassesMainActivity.kt:83, tag androidxr_projected_ai_glasses_activity_homescreen
xr/src/main/java/com/example/xr/projected/PhoneMainActivity.kt:86, tag androidxr_projected_start_glasses_activity

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gemini-code-assist · 2025-12-22T23:30:39Z

Summary of Changes

Hello @trambui09, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request lays the groundwork for AI glasses integration by incorporating essential Extended Reality (XR) libraries. It establishes a dedicated activity for the glasses display and a companion phone application that intelligently manages the connection to the glasses, enabling the launch of the glasses experience only when a device is actively connected. This ensures a seamless and context-aware user experience for projected content.

Highlights

New XR Dependencies: Added glimmer and projected libraries (version 1.0.0-alpha03) to the project's libs.versions.toml and build.gradle.kts files, enabling Extended Reality (XR) functionalities.
AI Glasses Activity: Introduced GlassesMainActivity.kt, a new ComponentActivity designed for AI glasses. This activity uses GlimmerTheme and displays a simple 'Hello, AI Glasses!' message with a close button.
Phone Launcher Activity: Created PhoneMainActivity.kt (named MainActivity within the file) which serves as a phone-side launcher. It detects the connection status of a projected device (AI glasses) using ProjectedContext.isProjectedDeviceConnected() and allows launching the GlassesMainActivity only when a device is connected.

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Code Review

This pull request introduces a projected activity for AI glasses, along with a phone-side activity to launch it. It adds the necessary glimmer and projected dependencies. The implementation correctly uses ProjectedContext to check for device connection and to launch the glasses activity. My review includes critical feedback on declaring the new activities in the Android Manifest, which is currently missing and would cause the app to crash. I've also suggested a class rename for consistency and a minor formatting improvement for better code readability.

gemini-code-assist · 2025-12-22T23:32:14Z

xr/src/main/java/com/example/xr/projected/GlassesMainActivity.kt

+import androidx.xr.glimmer.surface
+
+// [START androidxr_projected_ai_glasses_activity]
+class GlassesMainActivity : ComponentActivity() {


GlassesMainActivity is not declared in xr/src/main/AndroidManifest.xml. All activities must be declared in the manifest file. For a projected activity, it should be declared with android:theme="@android:style/Theme.NoDisplay" and an intent filter for androidx.xr.projected.ACTION_BIND_PROJECTED_SERVICE. For example:

<activity android:name=".projected.GlassesMainActivity" android:exported="true" android:theme="@android:style/Theme.NoDisplay"> <intent-filter> <action android:name="androidx.xr.projected.ACTION_BIND_PROJECTED_SERVICE" /> </intent-filter> </activity>

xr/src/main/java/com/example/xr/projected/PhoneMainActivity.kt

gemini-code-assist · 2025-12-22T23:32:15Z

xr/src/main/java/com/example/xr/projected/GlassesMainActivity.kt

+fun HomeScreen(modifier: Modifier = Modifier, onClose: () -> Unit) {
+    Box(
+        modifier = modifier
+            .surface(focusable = false).fillMaxSize(),


For better readability, it's a common convention in Jetpack Compose to chain modifiers on separate lines.

Suggested change

.surface(focusable = false).fillMaxSize(),

.surface(focusable = false)

.fillMaxSize(),

gradle/libs.versions.toml

kkuan2011 · 2025-12-22T23:55:19Z

xr/src/main/java/com/example/xr/projected/GlassesMainActivity.kt

+import androidx.xr.glimmer.surface
+
+// [START androidxr_projected_ai_glasses_activity]
+class GlassesMainActivity : ComponentActivity() {


Since you already have the code for an activity, do you want to add these activities to the manifest file for the xr module? If not, that's okay too, not a blocking comment.

Ah, yes. This is important! And will be part of the snippets too. Added

Is there a way to add the region tags in the manifest file?

Would it be?

[END androidxr_projected_ai_glasses_activity_manifest] -->```

Ah per our snippets criteria, you can actually omit the region tags from the manifest and leave that hardcoded in the documentation pages. It would get more complicated as more docs need to reference parts of the manifest file and there's no way to have overlapping region tags.

xr/src/main/java/com/example/xr/projected/GlassesMainActivity.kt

kkuan2011 · 2025-12-23T22:15:21Z

gradle/libs.versions.toml

 wearPhoneInteractions = "1.1.0"
 wearRemoteInteractions = "1.1.0"
+xrGlimmer = "1.0.0-alpha03"
+projected = "1.0.0-alpha03"


nit: also change to xrProjected

ah yeah, I had it changed and forgot to push it up! done!

kkuan2011 · 2025-12-23T22:23:05Z

xr/src/main/java/com/example/xr/projected/GlassesMainActivity.kt

+import androidx.xr.glimmer.surface
+
+// [START androidxr_projected_ai_glasses_activity]
+class GlassesMainActivity : ComponentActivity() {


Ah per our snippets criteria, you can actually omit the region tags from the manifest and leave that hardcoded in the documentation pages. It would get more complicated as more docs need to reference parts of the manifest file and there's no way to have overlapping region tags.

kkuan2011

Looks good from snippets repo perspective. Defer to XR/Compose DRE for the XR-related and lifecycle handling parts.

kkuan2011 · 2025-12-23T23:03:09Z

xr/src/main/AndroidManifest.xml

+            android:name="com.example.xr.projected.PhoneMainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />


nit: can you have two activities with the Main intent filter?

trambui09 added 2 commits December 22, 2025 15:22

add in projected snippets for AI glasses: glasses activity, launching…

e8c29c4

… a glasses activity

apply spotless checks

35967d9

trambui09 requested review from a team, kkuan2011 and yrezgui as code owners December 22, 2025 23:30

gemini-code-assist bot reviewed Dec 22, 2025

View reviewed changes

kkuan2011 requested changes Dec 22, 2025

View reviewed changes

trambui09 added 3 commits December 23, 2025 10:52

add activities into the manfiest file and add in a LifecycleObserver

e995493

add in the ProjectedDisplayController snippets

160ebff

apply spotless checks

3edddf4

kkuan2011 requested changes Dec 23, 2025

View reviewed changes

trambui09 added 2 commits December 23, 2025 14:57

change to xrProjected in libs.versions.toml file

7ab3b56

remove region tags in manfiest file

a55ef05

kkuan2011 approved these changes Dec 23, 2025

View reviewed changes

	.surface(focusable = false).fillMaxSize(),
	.surface(focusable = false)
	.fillMaxSize(),

Add AI glasses projected snippets #751

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trambui09 commented Dec 22, 2025

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gemini-code-assist bot commented Dec 22, 2025

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snippet-bot bot commented Dec 22, 2025 •

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