Display a web scene

Learn how to create and display a scene from a web scene stored in ArcGIS.

This tutorial shows you how to create and display a scene from a web scene. All web scenes are stored in ArcGIS with a unique item ID. You will access an existing web scene by item ID and display its layers. The web scene contains feature layers for the Santa Monica Mountains in California.

Prerequisites

Steps

Open an Android Studio project

1. To start this tutorial, complete the Display a scene tutorial. Or download and unzip the Display a scene solution in a new folder.

2. Modify the old project for use in this new tutorial. Expand More info for instructions.

   More info

   1. On your file system, delete the .idea folder, if present, at the top level of your project.

   2. In the Android tool window, 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 tool window, open Gradle Scripts > settings.gradle.kts.

      Change the value of rootProject.name to "Display a web scene".

      settings.gradle.kts

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      rootProject.name = "Display a web scene"
      
      include(":app")

   4. The UI theme composable in Display a scene tutorial was DisplayASceneTheme. Rename the theme composable throughout the tutorial by refactoring DisplayAWebSceneTheme.

      In the Android tool window, open app > kotlin+java > com.exmple.app > ui.theme > Theme.kt.

      Right-click the function name DisplayASceneTheme and select Refactor -> Rename. Replace the name with DisplayAWebSceneTheme.

      Theme.kt

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      @Composable
      fun DisplayASceneTheme(
      
          darkTheme: Boolean = isSystemInDarkTheme(),
          // Dynamic color is available on Android 12+
          dynamicColor: Boolean = true,
          content: @Composable () -> Unit
      ) {
          val colorScheme = when {
              dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
                  val context = LocalContext.current
                  if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
              }
      
              darkTheme -> DarkColorScheme
              else -> LightColorScheme
          }
      

      Expand

   5. Click File > Sync Project with Gradle files. Android Studio will recognize your changes and create a new .idea folder.

3. Set your API key in MainActivity.kt.

   More info

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

   1. In Android Studio: in the Android tool window, open app > java > com.example.app > MainActivity.

   2. In the setApiKey() function, find the ApiKey.create() call and paste your API key inside the quotes, replacing YOUR_API_KEY.

      MainActivity.kt

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          private fun setApiKey() {
      
              ArcGISEnvironment.apiKey = ApiKey.create("YOUR_API_KEY")
      
          }
      

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.

What's Next?

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

• Display a web map

• Display an offline map (on-demand)