Add initial cars snippets

cars/.gitignore

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+/build

cars/build.gradle.kts

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+plugins {
+    alias(libs.plugins.android.application)
+}
+
+android {
+    namespace = "com.example.cars"
+    compileSdk = libs.versions.compileSdk.get().toInt()
+
+    defaultConfig {
+        applicationId = "com.example.cars"
+        minSdk = 24
+        targetSdk = libs.versions.targetSdk.get().toInt()
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.androidx.car)
+    implementation(libs.google.android.material)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.test.ext.junit)
+    androidTestImplementation(libs.androidx.test.espresso.core)
+}

cars/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

cars/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright 2026 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          https://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Snippets" />
+
+</manifest>

cars/src/main/java/com/example/cars/apps/AutomotiveOS.kt

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+/*
+ * Copyright 2026 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.cars.apps
+
+import android.content.Intent
+import androidx.car.app.Screen
+import androidx.car.app.Session
+import com.example.cars.apps.library.MyStartScreen
+
+// [START android_cars_apps_automotive_os_handle_intents]
+class MySession : Session() {
+    // ...
+    override fun onCreateScreen(intent: Intent): Screen {
+        // Handle the intent when the app is being started for the first time
+        return MyStartScreen(carContext)
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        // Handle the intent when the app is already running
+    }
+}
+// [END android_cars_apps_automotive_os_handle_intents]

cars/src/main/java/com/example/cars/apps/IOT.kt

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+/*
+ * Copyright 2026 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.cars.apps
+
+import androidx.car.app.CarContext
+import androidx.car.app.Screen
+import androidx.car.app.model.Action
+import androidx.car.app.model.CarIcon
+import androidx.car.app.model.GridItem
+import androidx.car.app.model.GridTemplate
+import androidx.car.app.model.Header
+import androidx.car.app.model.ItemList
+import androidx.car.app.model.Template
+import androidx.core.graphics.drawable.IconCompat
+import com.example.cars.R
+
+class IOTScreen(carContext: CarContext) : Screen(carContext) {
+    override fun onGetTemplate(): Template {
+        // [START android_cars_apps_iot_grid_template]
+        val listBuilder = ItemList.Builder()
+        val headerBuilder = Header.Builder()
+        val garageIcon = IconCompat.createWithResource(
+            carContext,
+            R.drawable.ic_garage
+        )
+
+        listBuilder.addItem(
+            GridItem.Builder()
+                .setTitle("Garage door")
+                .setImage(
+                    CarIcon.Builder(garageIcon).build(),
+                    GridItem.IMAGE_TYPE_ICON
+                )
+                .setOnClickListener {
+                    // Handle user interactions
+                }
+                .build()
+        )
+
+        listBuilder.addItem(
+            GridItem.Builder()
+                .setTitle("Garage lights")
+                // Show a loading indicator until the status of the device is known
+                // (call invalidate() when the status is known to refresh the screen)
+                .setLoading(true)
+                .build()
+        )
+
+        return GridTemplate.Builder()
+            .setHeader(
+                headerBuilder.setTitle("Devices")
+                    .setStartHeaderAction(Action.APP_ICON).build()
+            )
+            .setSingleList(listBuilder.build())
+            .build()
+        // [END android_cars_apps_iot_grid_template]
+    }
+}

cars/src/main/java/com/example/cars/apps/POI.kt

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+/*
+ * Copyright 2026 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.cars.apps
+
+import androidx.car.app.CarContext
+import androidx.car.app.Screen
+import androidx.car.app.model.PlaceListMapTemplate
+import androidx.car.app.model.Template
+
+class MainScreen(carContext: CarContext) : Screen(carContext) {
+    override fun onGetTemplate(): Template {
+        // [START android_cars_apps_poi_refresh_content]
+        return PlaceListMapTemplate.Builder()
+            // ...
+            .setOnContentRefreshListener {
+                // Execute any desired logic
+                // ...
+                // Then call invalidate() so onGetTemplate() is called again
+                invalidate()
+            }
+            .build()
+        // [END android_cars_apps_poi_refresh_content]
+    }
+}

cars/src/main/java/com/example/cars/apps/library/StartScreen.kt

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+/*
+ * Copyright 2026 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.cars.apps.library
+
+import androidx.car.app.CarContext
+import androidx.car.app.Screen
+import androidx.car.app.model.Action
+import androidx.car.app.model.Header
+import androidx.car.app.model.Pane
+import androidx.car.app.model.PaneTemplate
+import androidx.car.app.model.Row
+import androidx.car.app.model.Template
+
+// [START android_cars_apps_library_start_screen]
+class MyStartScreen(carContext: CarContext) : Screen(carContext) {
+    override fun onGetTemplate(): Template {
+        val row = Row.Builder().setTitle("Hello world!").build()
+        val pane = Pane.Builder().addRow(row).build()
+        val header = Header.Builder()
+            .setStartHeaderAction(Action.APP_ICON)
+            .build()
+        return PaneTemplate.Builder(pane)
+            .setHeader(header)
+            .build()
+    }
+}
+// [END android_cars_apps_library_start_screen]

cars/src/main/res/drawable/ic_garage.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright 2026 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          https://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FFFFFF" android:pathData="M11,7h2v2h-2zM11,11h2v6h-2zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8z"/>
+</vector>