Add geospatial Kotlin sample for ARCore Android SDK

samples/geospatial_kotlin/.gitignore

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+# Android Studio configuration.
+*.iml
+.idea/
+
+# Gradle configuration.
+.gradle/
+build/
+
+# User configuration.
+local.properties
+
+# OS configurations.
+.DS_Store
+
+# Android NDK cmake output.
+.cxx/

samples/geospatial_kotlin/app/.gitignore

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+/build
+google-services.json

samples/geospatial_kotlin/app/build.gradle

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+/*
+ * Copyright 2017 Google LLC
+ *
+ * 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
+ *
+ *      http://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.
+ */
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+
+android {
+    namespace "com.google.ar.core.examples.kotlin.geospatial"
+    compileSdkVersion 36
+    defaultConfig {
+        applicationId "com.google.ar.core.examples.kotlin.geospatial"
+
+        // AR Optional apps must declare minSdkVersion >= 14.
+        // AR Required apps must declare minSdkVersion >= 24.
+        minSdkVersion 24
+        targetSdkVersion 36
+        versionCode 1
+        versionName '1.0'
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    kotlinOptions {
+        jvmTarget = '17'
+    }
+}
+
+dependencies {
+    // ARCore (Google Play Services for AR) library.
+    implementation 'com.google.ar:core:1.54.0'
+
+    // Obj - a simple Wavefront OBJ file loader
+    // https://github.com/javagl/Obj
+    implementation 'de.javagl:obj:0.4.0'
+
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.lifecycle:lifecycle-common-java8:2.2.0'
+    implementation 'com.google.android.gms:play-services-location:19.0.1'
+    implementation 'com.google.android.gms:play-services-auth:19.0.0'
+
+    implementation 'com.google.android.material:material:1.1.0'
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+}

samples/geospatial_kotlin/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /opt/android-sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# 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 *;
+#}

samples/geospatial_kotlin/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+   Copyright 2021 Google LLC
+
+   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
+
+      http://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"
+    xmlns:tools="http://schemas.android.com/tools">
+
+  <uses-permission android:name="android.permission.CAMERA"/>
+  <!-- Required to post notifications for Android T+ devices -->
+  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+  <uses-permission android:name="android.permission.INTERNET"/>
+  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
+  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+
+  <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+  <!-- Google Play assumes that certain hardware related permissions indicate that the underlying
+       hardware features are required by default.
+       (https://developer.android.com/topic/arc/manifest.html#implied-features). -->
+  <uses-feature android:name="android.hardware.camera" android:required="true" />
+  <!-- Limits app visibility in the Google Play Store to ARCore supported devices
+       (https://developers.google.com/ar/devices). -->
+  <uses-feature android:name="android.hardware.camera.ar" android:required="true"/>
+  <uses-feature android:glEsVersion="0x00020000" android:required="true" />
+
+  <application
+      android:appCategory="game"
+      android:allowBackup="false"
+      android:icon="@drawable/ic_launcher"
+      android:label="@string/app_name"
+      android:theme="@style/AppTheme"
+      android:usesCleartextTraffic="false"
+      tools:ignore="GoogleAppIndexingWarning">
+
+    <activity
+        android:name="com.google.ar.core.examples.kotlin.geospatial.GeospatialActivity"
+        android:configChanges="orientation|screenSize"
+        android:exported="true"
+        android:theme="@style/Theme.AppCompat.NoActionBar"
+        android:screenOrientation="locked">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN"/>
+        <category android:name="android.intent.category.LAUNCHER"/>
+      </intent-filter>
+    </activity>
+    <!-- Indicates whether "Google Play Services for AR" (ARCore) is "required" or "optional". -->
+    <meta-data android:name="com.google.ar.core" android:value="required" />
+  </application>
+</manifest>

samples/geospatial_kotlin/app/src/main/assets/models/README.txt

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+The file "dfg.raw" is a raw image file of dimensions 64x64 with two color
+channels stored in 16-bit floats. It can be regenerated by using the script
+"generate_dfg_texture.py" provided in the ARCore SDK under /tools/.