Display a web scene | ArcGIS Maps SDK for Kotlin

Learn how to create and display a sceneA scene is a collection of layers that are displayed in 3D. It is typically composed of a basemap layer, data layers, and 3D data.Learn more from a web sceneA web scene is a scene stored as a JSON object that defines properties such as the basemap layer, data layers, layer styles, and pop-up styles. Its JSON structure is defined by the web scene specification.Learn more stored in ArcGIS.

This tutorial shows you how to create and display a sceneA scene is a collection of layers that are displayed in 3D. It is typically composed of a basemap layer, data layers, and 3D data.Learn more from a web sceneA web scene is a scene stored as a JSON object that defines properties such as the basemap layer, data layers, layer styles, and pop-up styles. Its JSON structure is defined by the web scene specification.Learn more. All web scenes are stored in ArcGIS with a unique item IDAn item ID is a unique identifier representing a single item stored, managed, and accessed in a portal, such as a web map, hosted layer, or file.Learn more. You will access an existing web scene by item ID and display its layers. The web scene contains feature layersA feature layer (client-side) is a data layer that can access and display features from a feature service that has the same type of geometry and attribute fields.Learn more for the Santa Monica Mountains in California.

Prerequisites

Before starting this tutorial, you need the following:

An ArcGIS Location Platform or ArcGIS Online account.
A development and deployment environment that meets the system requirements.
An IDE for Android development in Kotlin.

Develop or download

You have two options for completing this tutorial:

Option 1: Develop the code or
Option 2: Download the completed solution

Option 1: Develop the code

Open an Android Studio project

Open the project you created by completing the Display a scene tutorial.
Continue with the following instructions to display a scene from a web scene stored in ArcGIS.
Modify the old project for use in this new tutorial.
1. On your file system, delete the .idea folder, if present, at the top level of your project.
2. In the Android view, open app > res > values > strings.xml.
  
  In the <string name="app_name"> element, change the text content to Display a web scene.
  strings.xml
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  1 2 3 4 5 <resources> <string name="app_name">Display a web scene</string> </resources>
3. In the Android view, open Gradle Scripts > settings.gradle.kts.
  
  Change the value of rootProject.name to "Display a web scene".
  settings.gradle.kts
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  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 dependencyResolutionManagement { repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS) repositories { google() mavenCentral() maven { url = uri("https://esri.jfrog.io/artifactory/arcgis") } } } rootProject.name = "Display a web scene" include(":app")
4. Click File > Sync Project with Gradle files. Android Studio will recognize your changes and create a new .idea folder.

Get the web scene item ID

You can use ArcGIS toolsTools, also known as developer tools, are ArcGIS software applications such as portal and ArcGIS Pro that developers can use to prepare content and data for custom applications they are building.Learn more to create and view web scenesA web scene is a scene stored as a JSON object that defines properties such as the basemap layer, data layers, layer styles, and pop-up styles. Its JSON structure is defined by the web scene specification.Learn more. Use the Scene ViewerScene Viewer(™) is a browser-based mapping tool that can view, create, and save web scenes.Learn more to identify the web scene item IDAn item ID is a unique identifier representing a single item stored, managed, and accessed in a portal, such as a web map, hosted layer, or file.Learn more. This item ID will be used later in the tutorial.

Go to the LA Trails and Parks web scene in the Scene Viewer in ArcGIS OnlineArcGIS Online is a GIS mapping, analytics, data hosting, and content management software as a service (SaaS) product. It includes applications, tools, APIs, and location services for users and developers. It is subscription-based and requires an ArcGIS Online account.Learn more. This web scene displays trails, trailheads and parks in the Santa Monica Mountains.
Make a note of the item ID at the end of the browser's URL. The item ID should be 579f97b2f3b94d4a8e48a5f140a6639b.

Add import statements

In MainScreen.kt, replace the import statements with the imports needed for this tutorial.

MainScreen.kt
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@file:OptIn(ExperimentalMaterial3Api::class)

package com.example.app.screens

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.material3.TopAppBar
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import com.arcgismaps.mapping.ArcGISScene
import com.arcgismaps.mapping.PortalItem
import com.arcgismaps.portal.Portal
import com.arcgismaps.toolkit.geoviewcompose.SceneView
import com.example.app.R

Display the web scene

You can display a web sceneA web scene is a scene stored as a JSON object that defines properties such as the basemap layer, data layers, layer styles, and pop-up styles. Its JSON structure is defined by the web scene specification.Learn more using the web scene's item IDAn item ID is a unique identifier representing a single item stored, managed, and accessed in a portal, such as a web map, hosted layer, or file.Learn more. Create a sceneA scene is a collection of layers that are displayed in 3D. It is typically composed of a basemap layer, data layers, and 3D data.Learn more from the web scene portal itemAn item, also known as a content item, is a resource stored in a portal such as a web map, hosted layer, style, script tool, file, or notebook.Learn more, and display it in your app.

Open the app > kotlin+java > com.example.app > MainActivity.kt. Delete the code inside createScene(). These lines come from the Display a scene tutorial and do not apply here.

MainScreen.kt
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fun createScene(): ArcGISScene {

    // 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
    }

    val cameraLocation = Point(
        x = -118.794,
        y = 33.909,
        z = 5330.0,
        spatialReference = SpatialReference.wgs84()
    )

    val camera = Camera(
        locationPoint = cameraLocation,
        heading = 355.0,
        pitch = 72.0,
        roll = 0.0
    )

    return ArcGISScene(BasemapStyle.ArcGISImagery).apply {

        baseSurface = surface

        initialViewpoint = Viewpoint(cameraLocation, camera)

    }

}
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Inside the empty createScene(), create a new Portal referencing ArcGIS OnlineArcGIS Online is a GIS mapping, analytics, data hosting, and content management software as a service (SaaS) product. It includes applications, tools, APIs, and location services for users and developers. It is subscription-based and requires an ArcGIS Online account.Learn more as the url parameter and Portal.Connection.Anonymous for the connection parameter.
MainScreen.kt
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fun createScene(): ArcGISScene {

    val portal = Portal(
        url = "https://www.arcgis.com",
        connection = Portal.Connection.Anonymous
    )

}
```

Next, create a Portal by passing the portal and the web scene's item IDAn item ID is a unique identifier representing a single item stored, managed, and accessed in a portal, such as a web map, hosted layer, or file.Learn more as parameters.

MainScreen.kt
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fun createScene(): ArcGISScene {

    val portal = Portal(
        url = "https://www.arcgis.com",
        connection = Portal.Connection.Anonymous
    )

    val portalItem = PortalItem(
        portal = portal,
        itemId = "579f97b2f3b94d4a8e48a5f140a6639b"
    )

}

Last, create an ArcGISScene using portalItem as the constructor parameter.

MainScreen.kt
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fun createScene(): ArcGISScene {

    val portal = Portal(
        url = "https://www.arcgis.com",
        connection = Portal.Connection.Anonymous
    )

    val portalItem = PortalItem(
        portal = portal,
        itemId = "579f97b2f3b94d4a8e48a5f140a6639b"
    )

    return ArcGISScene(portalItem)

}

Note

In the MainScreen composable, createScene() is called in the remember block. The scene is then passed as the arcGISScene argument to the SceneView composable. That code was already added in the Display a scene tutorial, from which you started the current tutorial.

MainScreen.kt
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@Composable
fun MainScreen() {

    val scene = remember {
        createScene()
    }

    Scaffold(
        topBar = { TopAppBar(title = { Text(text = stringResource(id = R.string.app_name)) }) }
    ) {
        SceneView(
            modifier = Modifier.fillMaxSize().padding(it),

            arcGISScene = scene

        )
    }
}
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Click Run > Run > app to run the app.

You should see a scene of trails, trailheads and parks in the Santa Monica Mountains. Drag, swipe, or pinch on the scene view to explore the scene.

If your app displays but the scene view is blank, you might need to adjust your emulator's settings.

With the emulator displayed, do the following:

Click the Extended Controls icon in the upper right corner of the emulator window.
In the Extended Controls dialog, click on Settings > Advanced > OpenGL ES API Level (requires restart).
Click the dropdown menu, and select Renderer maximum (up to OpenGL ES 3.1).
Restart your emulator.

Alternatively, you can download the tutorial solution, as follows.

Option 2: Download the solution

Click the Download solution link in the right-hand side of this page.
Unzip the file to a location on your machine.
Run Android Studio.
Go to File > Open.... Navigate to the solution folder and click Open.

On Windows: If you are in the Welcome to Android Studio dialog, click Open and navigate to the solution folder. Then click Open.

Since the downloaded solution does not contain authentication credentials, you must first set up authentication to create credentials, and then add the developer credentials to the solution.

Set up authentication

To access the secure ArcGIS location servicesArcGIS Location Services, also referred to as Location Services, are services hosted by Esri that provide geospatial functionality for developing mapping applications. They include the ArcGIS Basemap Styles service, ArcGIS Static Basemap Tiles service, ArcGIS Places service, ArcGIS Geocoding service, ArcGIS Routing service, ArcGIS GeoEnrichment service, and ArcGIS Elevation service. An ArcGIS Location Platform or ArcGIS Online account is required to use the services.Learn more used in this tutorial, you must implement API key authenticationAPI key authentication is a type of authentication that uses an API key to authenticate requests to ArcGIS services and secure portal items.Learn more or user authenticationUser authentication is a type of authentication that allows users with an ArcGIS account to sign into an application and allow it to access ArcGIS content, services, and resources on their behalf. The typical authorization protocol used is OAuth2.0.Learn more using an ArcGIS Location PlatformAn ArcGIS Location Platform account, formerly known as an ArcGIS Developer account, is an identity associated with an ArcGIS Location Platform subscription.Learn more or an ArcGIS OnlineAn ArcGIS Online account, also known as an ArcGIS Organization account, is an identity associated with an ArcGIS Online subscription. It can be used to access ArcGIS tools and develop applications with ArcGIS location services for an organization.Learn more account.

You can implement API key authentication or user authentication in this tutorial. Compare the differences below:

API key authenticationAPI key authentication is a type of authentication that uses an API key to authenticate requests to ArcGIS services and secure portal items.Learn more

Users are not required to sign in.
Requires creating an API key credentialAPI key credentials are an item that contains the parameters used to create and manage long-lived access tokens for API key authentication. They are a type of developer credential.Learn more with the correct privileges.
API keysAn API key is a long-lived access token created using API key credentials. They are valid for up to one year and are typically embedded directly into client applications.Learn more are long-lived access tokens.
Service usage is billed to the API key owner/developer.
Simplest authentication method to implement.
Recommended approach for new ArcGIS developers.

Learn more in API key authentication.

User authenticationUser authentication is a type of authentication that allows users with an ArcGIS account to sign into an application and allow it to access ArcGIS content, services, and resources on their behalf. The typical authorization protocol used is OAuth2.0.Learn more

Users are required to sign in with an ArcGIS accountAn ArcGIS account is an identity with a user type and set of privileges that can access specific ArcGIS products, tools, APIs, services, and resources. The main account types that can be used for development are an ArcGIS Location Platform account, ArcGIS Online account, and ArcGIS Enterprise account. ArcGIS Location Platform and ArcGIS Online accounts are also associated with a subscription.Learn more.
User accounts must have privilegePrivileges are a set of permissions assigned to ArcGIS accounts, developer credentials, and applications that grant access to secure resources and functionality in ArcGIS.Learn more to access the ArcGIS servicesA service, also known as an ArcGIS service, is software that supports an ArcGIS REST API and provides geospatial functionality or data. A service can be hosted by Esri or in ArcGIS Enterprise.Learn more used in application.
Requires creating OAuth credentialsOAuth credentials are an item that contains parameters required to implement user authentication or app authentication, including a client_id, client_secret, and redirect URIs. They are a type of developer credential.Learn more.
Application uses a redirect URL and client ID.
Service usage is billed to the organization of the user signed into the application.

Learn more in User authentication.

To complete this tutorial, click on the tab in the switcher below for your authentication type of choice, either API key authentication or User authentication.

Create a new API key access tokenAn access token is an authorization string that provides access to secure ArcGIS content, data, and services. Its capabilities are determined by the privileges it supports. It is obtained by implementing API key authentication, User authentication, or App authentication.Learn more with privilegesPrivileges are a set of permissions assigned to ArcGIS accounts, developer credentials, and applications that grant access to secure resources and functionality in ArcGIS.Learn more to access the secure resources used in this tutorial.

Complete the Create an API key tutorial and create an API key with the following privilege(s)Privileges are a set of permissions assigned to ArcGIS accounts, developer credentials, and applications that grant access to secure resources and functionality in ArcGIS.Learn more:
- Privileges
  - Location services > Basemaps
Copy and paste the API key access token into a safe location. It will be used in a later step.

Create new OAuth credentials to access the secure resources used in this tutorial.

Complete the Create OAuth credentials for user authentication tutorial to obtain a Client ID and Redirect URL.

A Client ID uniquely identifies your app on the authenticating server. If the server cannot find an app with the provided Client ID, it will not proceed with authentication.
The Redirect URL (also referred to as a callback url) is used to identify a response from the authenticating server when the system returns control back to your app after an OAuth login. Since it does not necessarily represent a valid endpoint that a user could navigate to, the redirect URL can use a custom scheme, such as my-app://auth. It is important to make sure the redirect URL used in your app's code matches a redirect URL configured on the authenticating server.
Copy and paste the Client ID and Redirect URL into a safe location. They will be used in a later step.

All users that access this application need account privilegesPrivileges are a set of permissions assigned to ArcGIS accounts, developer credentials, and applications that grant access to secure resources and functionality in ArcGIS.Learn more to access the ArcGIS Basemap Styles serviceThe ArcGIS Basemap Styles service, also referred to as the Basemap Styles service, is a location service that provides basemap styles and data for the world. It returns styles as Mapbox styles and web maps, and data as vector tiles and/or map tiles. It supports all of the styles in the ArcGIS Basemap style and Open Basemap style family. An ArcGIS Location Platform or ArcGIS Online account is required to use the service.Learn more.

Set developer credentials in the solution

To allow your app users to access ArcGIS location servicesArcGIS Location Services, also referred to as Location Services, are services hosted by Esri that provide geospatial functionality for developing mapping applications. They include the ArcGIS Basemap Styles service, ArcGIS Static Basemap Tiles service, ArcGIS Places service, ArcGIS Geocoding service, ArcGIS Routing service, ArcGIS GeoEnrichment service, and ArcGIS Elevation service. An ArcGIS Location Platform or ArcGIS Online account is required to use the services.Learn more, use the developer credentials that you created in the Set up authentication step to authenticate requests for resources.

In the Android view of Android Studio, open app > kotlin+java > com.example.app > MainActivity. Set the AuthenticationMode to .API_KEY.

MainActivity.kt
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class MainActivity : ComponentActivity() {

    private enum class AuthenticationMode { API_KEY, USER_AUTH }

    private val authenticationMode = AuthenticationMode.API_KEY
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Set the apiKey property with your API key access token.

MainActivity.kt
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    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        when (authenticationMode) {
            AuthenticationMode.API_KEY -> {

                ArcGISEnvironment.apiKey = ApiKey.create("YOUR_ACCESS_TOKEN")

            }
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Best Practice: The access token is stored directly in the code as a convenience for this tutorial. Do not store credentials directly in source code in a production environment.

In the Android view of Android Studio, open app > kotlin+java > com.example.app > MainActivity. Set the AuthenticationMode to .USER_AUTH.

MainActivity.kt
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class MainActivity : ComponentActivity() {
    private enum class AuthenticationMode { API_KEY, USER_AUTH }

    private val authenticationMode = AuthenticationMode.USER_AUTH

Set your clientID and redirectURL values. You must use the RedirectURL that you supplied for your app in the user authentication part of the Set up authentication step.

MainActivity.kt
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            AuthenticationMode.USER_AUTH -> {
                authenticatorState.oAuthUserConfigurations = listOf(
                    OAuthUserConfiguration(
                        portalUrl = "https://www.arcgis.com",

                        clientId = "YOUR_CLIENT_ID",
                        redirectUrl = "YOUR_REDIRECT_URL"

                    )
                )

Open app > manifests > AndroidManifest.xml.

Set the android:scheme and android:host using the scheme and host from your RedirectURL.

A redirectURL is composed of a scheme and a host component. The format for the redirect url is scheme://host. For example, if the redirect url is myscheme://myhost then the scheme is myscheme and the host is myhost.

AndroidManifest.xml
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                <data
                    android:scheme="your_redirect_url_scheme"
                    android:host="your_redirect_url_host" />
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Best Practice: The OAuth credentials are stored directly in the code as a convenience for this tutorial. Do not store credentials directly in source code in a production environment.

Run the app

Click Run > Run > app to run the app.

You should see a scene of trails, trailheads and parks in the Santa Monica Mountains. Drag, swipe, or pinch on 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: