Display a scene

Learn how to create and display a scene with a basemap layer and an elevation layer. Set properties of the scene's camera to control the 3D perspective.

Like a map, a scene contains layers of geographic data. It contains a basemap layer and, optionally, one or more data layers. To provide a realistic view of the terrain, you can also add elevation layers to define the height of the surface across the scene. The 3D perspective of the scene is controlled by the scene's camera, which defines the position of the scene observer in 3D space.

In this tutorial, you create and display a scene using the imagery basemap layer. The surface of the scene is defined with an elevation layer and the camera is positioned to display an area of the Santa Monica Mountains in the scene view.

The scene and code will be used as the starting point for other 3D tutorials.

Prerequisites

Steps

Create a new Android Studio project

Use Android Studio to create an app and configure it to reference the API.

1. Open Android Studio.

   • In the menu bar, click File > New > New Project....
   • In the Create New Project window, make sure Phone and Tablet tab is selected, and then select Empty Activity. Click Next.
   • In the Configure your project window, set the following configuration options:
     • Name: Display a scene.
     • Package name: Change to com.example.app. Or change to match your organization.
     • Save location: Set to a new folder.
     • Language: Kotlin
     • Minimum SDK: API 26: Android 8.0 (O)

2. In the Project tool window, make sure that your current view is Android. These tutorial instructions refer to that view.

   More info

   If your view name is something other than Android (such as Project or Packages), click on the leftmost control in the title bar of the Project tool window, and select Android from the list.

   

3. From the Project tool window, open Gradle Scripts > build.gradle (Project: Display_a_scene). Replace the contents of the file with the following code:

   build.gradle (Project: Display_a_scene)

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   // Top-level build file where you can add configuration options common to all sub-projects/modules.
   
   plugins {
       id 'com.android.application' version '7.3.1' apply false
       id 'com.android.library' version '7.3.1' apply false
       id 'org.jetbrains.kotlin.android' version '1.7.20' apply false
   }
   
   task clean(type: Delete) {
       delete rootProject.buildDir
   }

4. From the Project tool window, open Gradle Scripts > build.gradle (Module: Display_a_scene.app). Replace the contents of the file with the following code:

   build.gradle (Module: app)

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   plugins {
       id 'com.android.application'
       id 'org.jetbrains.kotlin.android'
   }
   
   android {
       compileSdkVersion 33
   
       defaultConfig {
   

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5. From the Project tool window, open Gradle Scripts > settings.gradle. Replace the contents of the file with the following code:

   settings.gradle (Display a scene)

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   pluginManagement {
       repositories {
           gradlePluginPortal()
           google()
           mavenCentral()
       }
   }
   
   dependencyResolutionManagement {
   

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6. Sync the Gradle changes. Click the Sync now prompt or click the refresh icon (Sync Project with Gradle Files) in the toolbar. This may take several minutes.

7. From the Project tool window, open app > manifests > AndroidManifest.xml. Update the Android manifest to allow network access.

   More info

   Insert these new elements within the manifest element. Do not alter or remove any other statements.

   Depending on what ArcGIS functionality you add in future tutorials, it is likely you will need to add additional permissions to your manifest.

   AndroidManifest.xml

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   <manifest xmlns:android="http://schemas.android.com/apk/res/android">
   
       <uses-permission android:name="android.permission.INTERNET" />
   

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Add import statements

Open app > java > com.example.app MainActivity.kt, and add import statements to reference the API.

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package com.example.app

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.databinding.DataBindingUtil
import com.arcgismaps.ApiKey
import com.arcgismaps.ArcGISEnvironment
import com.arcgismaps.geometry.Point
import com.arcgismaps.geometry.SpatialReference
import com.arcgismaps.mapping.ArcGISScene
import com.arcgismaps.mapping.ArcGISTiledElevationSource
import com.arcgismaps.mapping.BasemapStyle
import com.arcgismaps.mapping.Surface
import com.arcgismaps.mapping.Viewpoint
import com.arcgismaps.mapping.view.Camera
import com.arcgismaps.mapping.view.SceneView
import com.example.app.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

Add a UI for the scene view

A scene view is a UI component that displays a scene. It also handles user interactions with the scene, including navigating with touch gestures. Use XML to add a scene view to the UI and make it available to the main activity source code.

1. In app > res > layout > activity_main.xml, replace the entire TextView element with a SceneView element.

   More info

   If you do not see the XML code, select the Code tab to switch out of design mode and display the XML code in the editor.

   Your SceneView element creates an instance of the SceneView class from the ArcGIS Maps SDK for Kotlin.

   In your main activity source code, you can access the SceneView using an implicit property, which is declared in the value of the android:id attribute. In this case, the property will be named sceneView.

   activity_main.xml

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   <?xml version="1.0" encoding="utf-8"?>
   <layout xmlns:android="http://schemas.android.com/apk/res/android">
   
       <androidx.constraintlayout.widget.ConstraintLayout xmlns:tools="http://schemas.android.com/tools"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           tools:context=".MainActivity">
   
           <com.arcgismaps.mapping.view.SceneView
               android:id="@+id/sceneView"
               android:layout_width="match_parent"
               android:layout_height="match_parent"/>
   
       </androidx.constraintlayout.widget.ConstraintLayout>
   </layout>

2. In MainActivity.kt, create a read-only lazy variable named activityMainBinding referencing the generated Android class ActivityMainBinding. This variable will be initialized with DataBindingUtil.setContentView(this, R.layout.activity_main) when called.

   MainActivity.kt

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   class MainActivity : AppCompatActivity() {
   
       private val activityMainBinding: ActivityMainBinding by lazy {
           DataBindingUtil.setContentView(this, R.layout.activity_main)
       }
   
   

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3. Create a read-only variable named sceneView and bind it to the sceneView created in activity_main.xml.

   MainActivity.kt

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   class MainActivity : AppCompatActivity() {
   
       private val activityMainBinding: ActivityMainBinding by lazy {
           DataBindingUtil.setContentView(this, R.layout.activity_main)
       }
   
       private val sceneView: SceneView by lazy {
           activityMainBinding.sceneView
       }
   

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Add a scene

Use the scene view to display a scene centered on the Santa Monica Mountains in California. The scene will contain a imagery basemap layer.

1. In MainActivity.kt, add a new setupScene() method in your MainActivity class and create an ArcGISScene with an imagery basemap.

   MainActivity.kt

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       // set up your scene here. You will call this method from onCreate()
       private fun setupScene() {
   
           val scene = ArcGISScene(BasemapStyle.ArcGISImagery).apply {
   
           }
   
       }
   

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2. Create a new ArcGISTiledElevationSource and use it to create a new Surface. Then set the elevationExaggeration property on the surface to 2.5f to increase the 3D effect of the elevation.

   MainActivity.kt

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       // set up your scene here. You will call this method from onCreate()
       private fun setupScene() {
   
           val scene = ArcGISScene(BasemapStyle.ArcGISImagery).apply {
   
               // add base surface for elevation data
               val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
               val surface = Surface().apply {
                   elevationSources.add(elevationSource)
                   // add an exaggeration factor to increase the 3D effect of the elevation.
                   elevationExaggeration = 2.5f
               }
   
           }
   
       }
   

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3. Set the baseSurface property of the scene to the surface.

   MainActivity.kt

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       // set up your scene here. You will call this method from onCreate()
       private fun setupScene() {
   
           val scene = ArcGISScene(BasemapStyle.ArcGISImagery).apply {
   
               // add base surface for elevation data
               val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
               val surface = Surface().apply {
                   elevationSources.add(elevationSource)
                   // add an exaggeration factor to increase the 3D effect of the elevation.
                   elevationExaggeration = 2.5f
               }
   
               baseSurface = surface
   
           }
   
       }
   

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4. Create a Point for the camera and assign it to cameraLocation. Then create a Camera, passing the cameraLocation and values for the camera's heading, pitch, and roll.

   More info

   The position from which you view the scene is defined by a Camera. The following properties of the camera are used to define an observation point in the scene:

   • 3D location: Latitude, longitude, and altitude
   • Heading: Azimuth of the camera's direction
   • Pitch: Up and down angle
   • Roll: Side-to-side angle
   MainActivity.kt

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       // set up your scene here. You will call this method from onCreate()
       private fun setupScene() {
   
           val scene = ArcGISScene(BasemapStyle.ArcGISImagery).apply {
   
               // add base surface for elevation data
               val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
               val surface = Surface().apply {
                   elevationSources.add(elevationSource)
                   // add an exaggeration factor to increase the 3D effect of the elevation.
                   elevationExaggeration = 2.5f
               }
   
               baseSurface = surface
   
               // Point(x, y, z, spatialReference)
               val cameraLocation = Point(-118.794, 33.909, 5330.0, SpatialReference.wgs84())
               // Camera(location, heading, pitch, roll)
               val camera = Camera(cameraLocation, 355.0, 72.0, 0.0)
   
           }
   
           // set the scene on the scene view
           sceneView.scene = scene
   
       }
   

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5. Create a Viewpoint using the cameraLocation the camera and set it as the initial viewpoint for the scene.

   MainActivity.kt

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       // set up your scene here. You will call this method from onCreate()
       private fun setupScene() {
   
           val scene = ArcGISScene(BasemapStyle.ArcGISImagery).apply {
   
               // add base surface for elevation data
               val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
               val surface = Surface().apply {
                   elevationSources.add(elevationSource)
                   // add an exaggeration factor to increase the 3D effect of the elevation.
                   elevationExaggeration = 2.5f
               }
   
               baseSurface = surface
   
               // Point(x, y, z, spatialReference)
               val cameraLocation = Point(-118.794, 33.909, 5330.0, SpatialReference.wgs84())
               // Camera(location, heading, pitch, roll)
               val camera = Camera(cameraLocation, 355.0, 72.0, 0.0)
   
               initialViewpoint = Viewpoint(cameraLocation, camera)
   
           }
   
       }
   

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6. Set the scene property of sceneView to the new ArcGISScene.

   MainActivity.kt

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       // set up your scene here. You will call this method from onCreate()
       private fun setupScene() {
   
           val scene = ArcGISScene(BasemapStyle.ArcGISImagery).apply {
   
           }
   
           // set the scene on the scene view
           sceneView.scene = scene
   
       }
   

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7. In the onCreate() method, call lifecycle.addObserver(sceneView) to add the sceneView to the lifecycle scope. Then call setupScene(), which has been defined in the previous steps.

   More info

   Creating a new Android Studio project for Kotlin or Java automatically uses setContentView(R.layout.activity_main). You can run the scene view from the activity_main layout, but this requires a separate extension in the gradle script.

   MainActivity.kt

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   Change lineAdd line.

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       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
   
           lifecycle.addObserver(sceneView)
   
           setupScene()
   
       }
   

   Expand

Set your API key

An API Key enables access to services, web maps, and web scenes hosted in ArcGIS Online.

1. Go to your developer dashboard to get your API key. For these tutorials, use your default API key. It is scoped to include all of the services demonstrated in the tutorials.

2. Create the setApiKey() method, where you will set the ArcGISEnvironment.apiKey​ property by calling ApiKey.create() and passing your API key as a string. Don't forget the quotes.

   MainActivity.kt

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   Add line.Add line.Add line.Add line.Add line.Add line.Add line.Add line.

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       private fun setApiKey(){
           // set your API key
           // Note: it is not best practice to store API keys in source code. The API key is referenced
           // here for the convenience of this tutorial.
   
           ArcGISEnvironment.apiKey = ApiKey.create("YOUR_API_KEY")
   
       }
   
       // set up your scene here. You will call this method from onCreate()
       private fun setupScene() {
   
           val scene = ArcGISScene(BasemapStyle.ArcGISImagery).apply {
   

3. Call setApiKey() in the onCreate() lifecycle method, before the setupScene() call.

   MainActivity.kt

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       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
   
           lifecycle.addObserver(sceneView)
   
           setApiKey()
   
           setupScene()
   
       }
   

   Expand

4. Click Run > Run > app to run the app.

   More info

   In Android Studio, you have two choices for running your app: an actual Android device or the Android Emulator.

   Android device

   Connect your computer to your Android device, using USB or Wi-Fi. For more details, see How to connect your Android device.

   Android Emulator

   Create an AVD (Android Virtual Device) to run in the Android Emulator. For details, see Run apps on the Android Emulator.

   Selecting a device

   When you build and run an app in Android Studio, you must first select a device. From the Android Studio toolbar, you can access the drop-down list of your currently available devices, both virtual and physical.

   .

   If you cannot access the list on the toolbar, click Tools > Device Manager.

You should see a scene with the imagery basemap layer centered on the Santa Monica Mountains in California. Pinch, drag, and double-tap the scene view to explore the scene.

What's next?

Learn how to use additional API features, ArcGIS location services, and ArcGIS tools in these tutorials:

• Add a point, line, and polygon