Display a web scene

Before starting this tutorial, you need the following:

1. An ArcGIS Location Platform or ArcGIS Online account.

2. A development and deployment environment that meets the system requirements.

3. An IDE for Android development in Kotlin.

Option 1: Develop the code

Open an Android Studio project

1. Open the project you created by completing the Display a scene tutorial.

2. Continue with the following instructions to display a scene from a web scene stored in ArcGIS.

3. Modify the old project for use in this new tutorial.

   Expand for detailed instructions

   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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      <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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      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 tools to create and view web scenes. Use the Scene Viewer to identify the web scene item ID. This item ID will be used later in the tutorial.

1. Go to the LA Trails and Parks web scene in the Scene Viewer in ArcGIS Online. This web scene displays trails, trailheads and parks in the Santa Monica Mountains.
2. 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.

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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 scene using the web scene's item ID. Create a scene from the web scene portal item, and display it in your app.

1. 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)
   
       }
   
   }

2. Inside the empty createScene(), create a new Portal referencing ArcGIS Online 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
       )
   
   }

3. Next, create a Portal by passing the portal and the web scene's item ID 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"
       )
   
   }

4. 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)
   
   }

5. 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.

Option 2: Download the solution

1. Click the Download solution link in the right-hand side of this page.

2. Unzip the file to a location on your machine.

3. Run Android Studio.

4. 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 services used in this tutorial, you must implement API key authentication or user authentication using an ArcGIS Location Platform or an ArcGIS Online account.

Set developer credentials in the solution

To allow your app users to access ArcGIS location services, use the developer credentials that you created in the Set up authentication step to authenticate requests for resources.

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.