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trambui09trambui09
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add in projected snippets for AI glasses: glasses activity, launching a glasses activity
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7 files changed

+334
-2
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7 files changed

+334
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‎gradle/libs.versions.toml‎

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@@ -98,6 +98,8 @@ wearToolingPreview = "1.0.0"
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webkit = "1.14.0"
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wearPhoneInteractions = "1.1.0"
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wearRemoteInteractions = "1.1.0"
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xrGlimmer = "1.0.0-alpha03"
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xrProjected = "1.0.0-alpha03"
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[libraries]
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accompanist-adaptive = "com.google.accompanist:accompanist-adaptive:0.37.3"
@@ -241,6 +243,8 @@ wear-compose-material = { module = "androidx.wear.compose:compose-material", ver
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wear-compose-material3 = { module = "androidx.wear.compose:compose-material3", version.ref = "wearComposeMaterial3" }
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androidx-wear-phone-interactions = { group = "androidx.wear", name = "wear-phone-interactions", version.ref = "wearPhoneInteractions" }
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androidx-wear-remote-interactions = { group = "androidx.wear", name = "wear-remote-interactions", version.ref = "wearRemoteInteractions" }
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androidx-glimmer = { group = "androidx.xr.glimmer", name = "glimmer", version.ref = "xrGlimmer" }
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androidx-projected = { group = "androidx.xr.projected", name = "projected", version.ref = "xrProjected" }
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[plugins]
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android-application = { id = "com.android.application", version.ref = "androidGradlePlugin" }

‎xr/build.gradle.kts‎

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@@ -40,6 +40,8 @@ dependencies {
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implementation(libs.androidx.activity.ktx)
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implementation(libs.androidx.media3.exoplayer)
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implementation(libs.androidx.glimmer)
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implementation(libs.androidx.projected)
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val composeBom = platform(libs.androidx.compose.bom)
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implementation(composeBom)
@@ -68,4 +70,4 @@ dependencies {
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implementation(libs.androidx.activity.compose)
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implementation(libs.androidx.appcompat)
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}
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}

‎xr/src/main/AndroidManifest.xml‎

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@@ -19,6 +19,23 @@
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<application
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android:label="XR"
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tools:ignore="MissingApplicationIcon" />
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tools:ignore="MissingApplicationIcon">
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<activity
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android:name="com.example.xr.projected.GlassesMainActivity"
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android:exported="true"
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android:requiredDisplayCategory="@string/display_category_xr_projected">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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</intent-filter>
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</activity>
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<activity
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android:name="com.example.xr.projected.PhoneMainActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

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

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@@ -0,0 +1,51 @@
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/*
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* Copyright 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.xr.projected
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import android.content.Context
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import androidx.core.content.ContextCompat
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import androidx.lifecycle.DefaultLifecycleObserver
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import androidx.lifecycle.LifecycleOwner
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import androidx.xr.projected.ProjectedDisplayController
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import androidx.xr.projected.ProjectedDisplayController.PresentationMode
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import androidx.xr.projected.experimental.ExperimentalProjectedApi
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import java.util.function.Consumer
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@OptIn(ExperimentalProjectedApi::class)
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class GlassesLifecycleObserver(
30+
context: Context,
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private val controller: ProjectedDisplayController,
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private val onVisualsChanged: (Boolean) -> Unit
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) : DefaultLifecycleObserver {
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private val executor = ContextCompat.getMainExecutor(context)
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private val visualStateListener = Consumer<ProjectedDisplayController.PresentationModeFlags> { flags ->
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val visualsOn = flags.hasPresentationMode(PresentationMode.VISUALS_ON)
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onVisualsChanged(visualsOn)
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}
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override fun onStart(owner: LifecycleOwner) {
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// Register when the Activity is visible
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controller.addPresentationModeChangedListener(executor, visualStateListener)
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}
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override fun onStop(owner: LifecycleOwner) {
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// Unregister when the Activity is hidden to save battery and prevent leaks
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controller.removePresentationModeChangedListener(visualStateListener)
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}
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}

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

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/*
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* Copyright 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
5+
* you may not use this file except in compliance with the License.
6+
* You may obtain a copy of the License at
7+
*
8+
* https://www.apache.org/licenses/LICENSE-2.0
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*
10+
* Unless required by applicable law or agreed to in writing, software
11+
* distributed under the License is distributed on an "AS IS" BASIS,
12+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13+
* See the License for the specific language governing permissions and
14+
* limitations under the License.
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*/
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package com.example.xr.projected
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import android.os.Bundle
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import androidx.activity.ComponentActivity
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import androidx.activity.compose.setContent
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import androidx.activity.viewModels
23+
import androidx.compose.foundation.layout.Box
24+
import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.runtime.Composable
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import androidx.compose.runtime.getValue
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import androidx.compose.ui.Alignment
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import androidx.compose.ui.Modifier
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import androidx.lifecycle.LifecycleOwner
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import androidx.lifecycle.DefaultLifecycleObserver
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import androidx.lifecycle.compose.collectAsStateWithLifecycle
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import androidx.lifecycle.lifecycleScope
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import androidx.xr.glimmer.Button
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import androidx.xr.glimmer.Card
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import androidx.xr.glimmer.GlimmerTheme
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import androidx.xr.glimmer.Text
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import androidx.xr.glimmer.surface
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import androidx.xr.projected.ProjectedDisplayController
39+
import androidx.xr.projected.experimental.ExperimentalProjectedApi
40+
import kotlinx.coroutines.launch
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// [START androidxr_projected_ai_glasses_activity]
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@OptIn(ExperimentalProjectedApi::class)
44+
class GlassesMainActivity : ComponentActivity() {
45+
46+
override fun onCreate(savedInstanceState: Bundle?) {
47+
super.onCreate(savedInstanceState)
48+
val viewModel: GlassesViewModel by viewModels()
49+
50+
lifecycleScope.launch {
51+
val controller = ProjectedDisplayController.create(this@GlassesMainActivity)
52+
53+
val observer = GlassesLifecycleObserver(
54+
context = this@GlassesMainActivity,
55+
controller = controller,
56+
onVisualsChanged = viewModel::updateVisuals
57+
)
58+
lifecycle.addObserver(observer)
59+
60+
// Cleanup observer to close the controller
61+
lifecycle.addObserver(object : DefaultLifecycleObserver {
62+
override fun onDestroy(owner: LifecycleOwner) {
63+
controller.close()
64+
}
65+
})
66+
}
67+
68+
setContent {
69+
// [required] Use collectAsStateWithLifecycle for safe collection
70+
val uiState by viewModel.uiState.collectAsStateWithLifecycle()
71+
72+
GlimmerTheme {
73+
HomeScreen(
74+
visualsOn = uiState.areVisualsOn,
75+
onClose = { finish() }
76+
)
77+
}
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}
79+
}
80+
}
81+
// [END androidxr_projected_ai_glasses_activity]
82+
83+
// [START androidxr_projected_ai_glasses_activity_homescreen]
84+
@Composable
85+
fun HomeScreen(
86+
visualsOn: Boolean,
87+
onClose: () -> Unit,
88+
modifier: Modifier = Modifier
89+
) {
90+
Box(
91+
modifier = modifier
92+
.surface(focusable = false)
93+
.fillMaxSize(),
94+
contentAlignment = Alignment.Center
95+
) {
96+
Card(
97+
title = { Text("Android XR") },
98+
action = {
99+
Button(onClick = onClose) {
100+
Text("Close")
101+
}
102+
}
103+
) {
104+
if (visualsOn) {
105+
Text("Hello, AI Glasses!")
106+
} else {
107+
Text("Display is off. Audio guidance active.")
108+
}
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}
110+
}
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}
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// [END androidxr_projected_ai_glasses_activity_homescreen]

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

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/*
2+
* Copyright 2026 The Android Open Source Project
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*
4+
* Licensed under the Apache License, Version 2.0 (the "License");
5+
* you may not use this file except in compliance with the License.
6+
* You may obtain a copy of the License at
7+
*
8+
* https://www.apache.org/licenses/LICENSE-2.0
9+
*
10+
* Unless required by applicable law or agreed to in writing, software
11+
* distributed under the License is distributed on an "AS IS" BASIS,
12+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13+
* See the License for the specific language governing permissions and
14+
* limitations under the License.
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*/
16+
17+
package com.example.xr.projected
18+
19+
import androidx.lifecycle.ViewModel
20+
import kotlinx.coroutines.flow.MutableStateFlow
21+
import kotlinx.coroutines.flow.StateFlow
22+
import kotlinx.coroutines.flow.asStateFlow
23+
import kotlinx.coroutines.flow.update
24+
25+
data class GlassesUiState(
26+
val areVisualsOn: Boolean = true
27+
)
28+
class GlassesViewModel : ViewModel() {
29+
private val _uiState = MutableStateFlow(GlassesUiState())
30+
val uiState: StateFlow<GlassesUiState> = _uiState.asStateFlow()
31+
32+
fun updateVisuals(visualsOn: Boolean) {
33+
_uiState.update { it.copy(areVisualsOn = visualsOn) }
34+
}
35+
}

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

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/*
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* Copyright 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
5+
* you may not use this file except in compliance with the License.
6+
* You may obtain a copy of the License at
7+
*
8+
* https://www.apache.org/licenses/LICENSE-2.0
9+
*
10+
* Unless required by applicable law or agreed to in writing, software
11+
* distributed under the License is distributed on an "AS IS" BASIS,
12+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13+
* See the License for the specific language governing permissions and
14+
* limitations under the License.
15+
*/
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17+
package com.example.xr.projected
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19+
import android.content.Intent
20+
import android.os.Build
21+
import android.os.Bundle
22+
import androidx.activity.ComponentActivity
23+
import androidx.activity.compose.setContent
24+
import androidx.activity.enableEdgeToEdge
25+
import androidx.annotation.RequiresApi
26+
import androidx.compose.foundation.layout.Arrangement
27+
import androidx.compose.foundation.layout.Column
28+
import androidx.compose.foundation.layout.Spacer
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.foundation.layout.height
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import androidx.compose.foundation.layout.padding
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import androidx.compose.material3.Button
33+
import androidx.compose.material3.ButtonDefaults
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import androidx.compose.material3.MaterialTheme
35+
import androidx.compose.material3.Scaffold
36+
import androidx.compose.material3.Text
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import androidx.compose.runtime.Composable
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import androidx.compose.runtime.getValue
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import androidx.compose.runtime.rememberCoroutineScope
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import androidx.compose.ui.Alignment
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.platform.LocalContext
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import androidx.compose.ui.unit.dp
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import androidx.lifecycle.compose.collectAsStateWithLifecycle
45+
import androidx.xr.projected.ProjectedContext
46+
import androidx.xr.projected.experimental.ExperimentalProjectedApi
47+
48+
class PhoneMainActivity : ComponentActivity() {
49+
@RequiresApi(Build.VERSION_CODES.BAKLAVA)
50+
override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
52+
enableEdgeToEdge()
53+
setContent {
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MaterialTheme {
55+
ConnectionScreen()
56+
}
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}
58+
}
59+
}
60+
61+
@RequiresApi(Build.VERSION_CODES.BAKLAVA)
62+
@OptIn(ExperimentalProjectedApi::class)
63+
@Composable
64+
fun ConnectionScreen() {
65+
val context = LocalContext.current
66+
Scaffold { paddingValues ->
67+
Column(
68+
modifier = Modifier
69+
.fillMaxSize()
70+
.padding(paddingValues),
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horizontalAlignment = Alignment.CenterHorizontally,
72+
verticalArrangement = Arrangement.Center
73+
) {
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Text(
75+
text = "Hello AI Glasses",
76+
style = MaterialTheme.typography.titleLarge
77+
)
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Spacer(modifier = Modifier.height(32.dp))
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val scope = rememberCoroutineScope()
80+
val isGlassesConnected by ProjectedContext.isProjectedDeviceConnected(
81+
context,
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scope.coroutineContext
83+
).collectAsStateWithLifecycle(initialValue = false)
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Button(
85+
onClick = {
86+
// [START androidxr_projected_start_glasses_activity]
87+
88+
val options = ProjectedContext.createProjectedActivityOptions(context)
89+
val intent = Intent(context, GlassesMainActivity::class.java)
90+
context.startActivity(intent, options.toBundle())
91+
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// [END androidxr_projected_start_glasses_activity]
93+
},
94+
colors = ButtonDefaults.buttonColors(
95+
containerColor = if (isGlassesConnected) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.error
96+
),
97+
enabled = isGlassesConnected
98+
) {
99+
Text(
100+
text = "Launch",
101+
style = MaterialTheme.typography.headlineMedium
102+
)
103+
}
104+
Spacer(modifier = Modifier.height(32.dp))
105+
Text(
106+
text = "Status: " + if (isGlassesConnected) "Connected" else "Disconnected",
107+
style = MaterialTheme.typography.titleMedium
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)
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}
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}
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}

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