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Showing content from https://developers.arcgis.com/android/maps-2d/tutorials/display-a-web-map/ below:

Display a web map | ArcGIS Runtime API for Android

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

A web map contains the definition of a map, including properties such as the basemap, initial extent, layers, styles, pop-ups, and labels. You can author and save web maps using the Map Viewer or ArcGIS Pro and share them in ArcGIS. Each web map is stored as an item in ArcGIS Online or ArcGIS Enterprise, allowing you to access a web map from a portal using its item ID and display it in your app.

In this tutorial, you use a web map's item ID to display a map of

trails, trailheads and parks in the Santa Monica Mountains

. The web map is hosted in

ArcGIS Online

Note

For more background information about the topics in this tutorial, visit Maps (2D) and in the Mapping and location services guide.

Prerequisites

Before starting this tutorial:

You need an ArcGIS Location Platform or ArcGIS Online account.
Confirm that your system meets the system requirements.
An IDE for Android development in Kotlin.

Note

This tutorial uses Android Studio Chipmunk 2021.2.1 Patch 1, but the code described should work in any Android IDE that supports Kotlin, including later versions of Android Studio.

Steps Open an Android Studio project

To start this tutorial, complete the Display a map tutorial. Or download and unzip the Display a map solution in a new folder.
Modify the old project for use in this new tutorial. Expand More info for instructions.
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 map.
  
  strings.xml
  
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```
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<resources>

    <string name="app_name">Display a web map</string>

</resources>
```
3. In the Android tool window, open Gradle Scripts > settings.gradle.
  
  Change the value of rootProject.name to Display a web map.
  
  settings.gradle
  
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```
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rootProject.name = "Display a web map"

include ':app'
```
4. Click File > Sync Project with Gradle files. Android Studio will recognize your changes and create a new .idea folder.
If you downloaded the solution, get an access token and set the API key.
1. Go to the Create an API key tutorial to obtain a new API key access token using your ArcGIS Location Platform or ArcGIS Online account. Ensure that the following privilege is enabled: Location services > Basemaps > Basemap styles service. Copy the access token as it will be used in the next step.
2. In Android Studio: in the Android tool window, open app > java > com.example.app > MainActivity.
3. In the setApiKeyForApp() method, find the ArcGISRuntimeEnvironment.setApiKey("YOUR_ACCESS_TOKEN") call and paste your access token inside the double quotes, replacing YOUR_ACCESS_TOKEN.
  
  MainActivity.kt
  
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```
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    private fun setApiKeyForApp(){

        ArcGISRuntimeEnvironment.setApiKey("YOUR_ACCESS_TOKEN")

    }
```
  Warning
  The access token is stored directly in the code as a convenience for this tutorial. Storing access tokens in the source code is not best practice.

Get the web map item ID

You can use ArcGIS tools to create and view web maps. Use the Map Viewer to identify the web map item ID. This item ID will be used later in the tutorial.

Go to the LA Trails and Parks web map in the Map Viewer in ArcGIS Online. This web map 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
41281c51f9de45edaf1c8ed44bb10e30
.

Add import statements

Replace app-specific import statements with the imports needed for this tutorial.

MainActivity.kt

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package com.example.app

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment
import com.esri.arcgisruntime.mapping.ArcGISMap
import com.esri.arcgisruntime.mapping.view.MapView
import com.esri.arcgisruntime.portal.Portal
import com.esri.arcgisruntime.portal.PortalItem

import com.example.app.databinding.ActivityMainBinding

Display the web map

You can create a map from a web map using the web map's item ID. Use the PortalItem class to access the web map, and the ArcGISMap class to create and display a map from it.

Delete the code inside the setupMap method. These lines come from the Display a map tutorial and do not apply here.

MainActivity.kt

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    // set up your map here. You will call this method from onCreate()
    private fun setupMap() {

        // create a map with the BasemapStyle streets
        val map = ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC)

        // set the map to be displayed in the layout's MapView
        mapView.map = map

        // set the viewpoint, Viewpoint(latitude, longitude, scale)
        mapView.setViewpoint(Viewpoint(34.0270, -118.8050, 72000.0))

    }

Create a new Portal referencing ArcGIS Online as the portalUrl parameter and false for the loginRequired parameter.

MainActivity.kt

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    // set up your map here. You will call this method from onCreate()
    private fun setupMap(){

        val portal = Portal("https://www.arcgis.com", false)

    }

Create a PortalItem for the web map, by passing the portal and the web map's item ID as parameters.

Create an ArcGISMap using the portalItem as the constructor parameter.

MainActivity.kt

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        val portal = Portal("https://www.arcgis.com", false)

        val itemId = "41281c51f9de45edaf1c8ed44bb10e30"
        val portalItem = PortalItem(portal, itemId)
        val map = ArcGISMap(portalItem)

Set the map property of mapView to the ArcGISMap you just created.

MainActivity.kt

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    // set up your map here. You will call this method from onCreate()
    private fun setupMap(){

        val portal = Portal("https://www.arcgis.com", false)

        val itemId = "41281c51f9de45edaf1c8ed44bb10e30"
        val portalItem = PortalItem(portal, itemId)
        val map = ArcGISMap(portalItem)

        mapView.map = map

    }

Click Run > Run > app to run the app.

You should see a map of

trails, trailheads and parks in the Santa Monica Mountains

. Drag, swipe, or pinch on the map view to explore the map.

What's next?

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

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