Display an offline map (on-demand) | ArcGIS Maps SDK for Flutter

Learn how to download and display an offline map An offline map is a map area and its data content downloaded from an offline-enabled web map for use in offline applications built with ArcGIS Maps SDKs for Native Apps. Learn more for a user-defined geographical area of a web map A web map is a map 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 map specification. Learn more .

display an offline map on demand

Offline maps An offline map is a map area and its data content downloaded from an offline-enabled web map for use in offline applications built with ArcGIS Maps SDKs for Native Apps. Learn more allow users to continue working when network connectivity is poor or lost. If a web map A web map is a map 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 map specification. Learn more is enabled for offline use, a user can request that ArcGIS generates an offline map for a specified geographic area of interest.

In this tutorial, you will download an offline map An offline map is a map area and its data content downloaded from an offline-enabled web map for use in offline applications built with ArcGIS Maps SDKs for Native Apps. Learn more for an area of interest from the web map A web map is a map 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 map specification. Learn more of the stormwater network within Naperville, IL, USA . You can then use this offline map without a network connection.

Prerequisites

Before starting this tutorial:

You need an ArcGIS Location Platform or ArcGIS Online account.
Your system meets the system requirements.
You need an IDE for Flutter - we recommend VS Code.

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

To start the tutorial, complete the Display a map tutorial. This creates a map to display the Santa Monica Mountains in California using the topographic basemap from the ArcGIS Basemap Styles service The 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 .

Open Flutter project

Open the project you created by completing the Display a map tutorial.
Continue with the following instructions to download and display an offline map for a user-defined geographical area of a web map.

Import additional library and package

As part of the offline workflow, you will need to store a downloaded map to your device. You will add the dart:io library to gain access to an API to deal with files and directories and the path_provider package to access local files on a device.

Open lib\main.dart.
From the menu bar, select View > Terminal to open a new terminal, if necessary.
Add the path_provider package to the project as a dependency running the following command:
flutter pub add path_provider
The path_provider package provides a Flutter plugin for finding commonly used locations on the file system. You can learn more about this package on pub.dev.
Import path_provider and dart.io into main.dart.
main.dart
import 'dart:io'; import 'package:path_provider/path_provider.dart';
The dart:io library provides API to deal with files and directories. You can read more about the library here.

Get the web map item ID

You can use ArcGIS tools Tools, 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 maps A web map is a map 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 map specification. Learn more . Use the Map Viewer Map Viewer is a browser-based mapping tool that can view, create, and save web maps. It can also perform mapping, visualization, and spatial analysis operations. Learn more to identify the web map item ID An 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 Naperville water network in the Map Viewer Map Viewer is a browser-based mapping tool that can view, create, and save web maps. It can also perform mapping, visualization, and spatial analysis operations. Learn more in ArcGIS Online ArcGIS 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 map A web map is a map 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 map specification. Learn more displays stormwater network within Naperville, IL, USA .
Make a note of the item ID An 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 at the end of the browser’s URL. The item ID should be:
acc027394bc84c2fb04d1ed317aac674

Display the web map

You can display a web map A web map is a map 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 map specification. Learn more using the web map’s item ID An 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 map A map is a collection of layers that are displayed in 2D. It is typically composed of a basemap layer and data layers. Learn more from the web map portal item An 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.

Replace all the code contained in onMapViewReady() to instead create a portal item using the item ID from the ArcGIS Online web map.

main.dart

void onMapViewReady() {

  // Create an ArcGIS Online portal item using the item ID.
  final portalItem = PortalItem.withPortalAndItemId(
    portal: Portal.arcGISOnline(),
    itemId: 'acc027394bc84c2fb04d1ed317aac674',
  );

}

Define a final map variable and set its value to an instance of ArcGISMap using the PortalItem.

main.dart > onMapViewReady()

    // Create an ArcGIS Online portal item using the item ID.
    final portalItem = PortalItem.withPortalAndItemId(
      portal: Portal.arcGISOnline(),
      itemId: 'acc027394bc84c2fb04d1ed317aac674',
    );

    // Define an ArcGIS map variable to hold on to the web map.
    final map = ArcGISMap.withItem(portalItem);

Set the map to the ArcGISMapViewController‘s arcGISMap property.

main.dart > onMapViewReady()

    // Define an ArcGIS map variable to hold on to the web map.
    final map = ArcGISMap.withItem(portalItem);

    // Set the map to the map view controller's ArcGIS map property.
    _mapViewController.arcGISMap = map;

Make sure you have an Android emulator, iOS simulator or physical device configured and running.
In VS Code, select Run > Run Without Debugging.

You should see a map of the stormwater network within Naperville, IL, USA. Pinch, drag, and double-tap the map view to explore the map. Leave the application running while you move into the next section to continue with the tutorial.

Specify an area of the web map to take offline

To specify an area of the web map A web map is a map 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 map specification. Learn more to take offline, you will use an Envelope that will be constructed using the EnvelopeBuilder. You will then display the area on the map using a Graphic.

Create an envelope builder and set its spatial reference to match the web map.

main.dart > onMapViewReady()

    // Set the map to the map view controller's ArcGIS map property.
    _mapViewController.arcGISMap = map;

    // Create an envelope builder.
    final envelopeBuilder = EnvelopeBuilder(
      // Set the spatial reference.
      spatialReference: SpatialReference.wgs84,
    );

Use the envelope builder to define an area to take offline.

Geometry builders in the Flutter Maps SDK are useful for constructing geometries in a step-by-step fashion. Although the values are provided in the tutorial, you could use the same builder with user input to allow for a more dynamic area to be defined.

main.dart > onMapViewReady()

    // Create an envelope builder.
    final envelopeBuilder = EnvelopeBuilder(
      // Set the spatial reference.
      spatialReference: SpatialReference.wgs84,
    );

    // Add the lower left (Xmin, Ymin) and upper right (Xmax, Ymax)
    // coordinates to define the area to take offline.
    envelopeBuilder.xMin = -88.1526;
    envelopeBuilder.xMax = -88.1490;
    envelopeBuilder.yMin = 41.7694;
    envelopeBuilder.yMax = 41.7714;

    // Retrieve the new geometry from the builder.
    final offlineArea = envelopeBuilder.toGeometry();

Display a graphic of the area to take offline.

Use SimpleLineSymbol and SimpleFillSymbol to display a new Graphic of the offlineArea with a red outline. Add the graphic to a new GraphicsOverlay and add the new overlay to the _mapViewController.graphicsOverlays property to display it in the map view.

main.dart > onMapViewReady()

    // Retrieve the new geometry from the builder.
    final offlineArea = envelopeBuilder.toGeometry();

    // Define a red line symbol to act as the outline
    // for the area of interest.
    final lineSymbol = SimpleLineSymbol(
      style: SimpleLineSymbolStyle.solid,
      color: Colors.red,
      width: 2,
    );

    // Define a fill symbol that is transparent, setting the
    // outline to the line symbol.
    final fillSymbol = SimpleFillSymbol(
      style: SimpleFillSymbolStyle.solid,
      color: Colors.transparent,
      outline: lineSymbol,
    );

    // Create a graphic for the area of interest using the
    // built geometry and symbol.
    final offlineAreaGraphic = Graphic(
      geometry: offlineArea,
      symbol: fillSymbol,
    );

    // Create a new graphics overlay.
    final areaOverlay = GraphicsOverlay();

    // Add the graphic to the graphics overlay.
    areaOverlay.graphics.add(offlineAreaGraphic);

    // Add the graphics overlay to the map view controller.
    _mapViewController.graphicsOverlays.add(areaOverlay);

Use Flutter’s hot restart to load your code changes and restart the app.

You should see a red outline on the stormwater network within Naperville, IL, USA. This indicates the area of the web map that you are going to take offline.

Download and display the offline map

You can generate and download an offline map An offline map is a map area and its data content downloaded from an offline-enabled web map for use in offline applications built with ArcGIS Maps SDKs for Native Apps. Learn more for an area of interest using an asynchronous task. When complete, it will provide the offline map for display in your map view A map view is a user interface that displays map layers and graphics in 2D. It controls the area (extent) of the map that is visible and supports user interactions such as pan and zoom. Learn more .

Create an OfflineMapTask using the online map.

main.dart > onMapViewReady()

    // Add the graphics overlay to the map view controller.
    _mapViewController.graphicsOverlays.add(areaOverlay);

    // Create an offline map task for the map.
    final offlineMapTask = OfflineMapTask.withOnlineMap(map);

In onMapViewReady(), change the method signature to denote the method as asynchronous.
main.dart
void onMapViewReady() async {

Get default parameters to generate and download the offline map An offline map is a map area and its data content downloaded from an offline-enabled web map for use in offline applications built with ArcGIS Maps SDKs for Native Apps. Learn more . Modify them to download a read-only offline map.

This tutorial does not involve editing and updating the contents of the offline map. When an offline map is editable, metadata is stored in ArcGIS to track and synchronize edits. Setting the GenerateOfflineMapUpdateMode to noUpdates avoids the overhead of maintaining this metadata in ArcGIS.

main.dart > onMapViewReady()

    // Create an offline map task for the map.
    final offlineMapTask = OfflineMapTask.withOnlineMap(map);

    // Create parameters specifying the region to take offline
    // using the graphic's geometry. Set the update mode to
    // no updates to avoid the overhead of maintaining the
    // metadata required when synchronizing edits.
    final parameters =
        await offlineMapTask.createDefaultGenerateOfflineMapParameters(
            areaOfInterest: offlineArea,
          )
          ..updateMode = GenerateOfflineMapUpdateMode.noUpdates;

Set a download location for the offline map An offline map is a map area and its data content downloaded from an offline-enabled web map for use in offline applications built with ArcGIS Maps SDKs for Native Apps. Learn more .

main.dart > onMapViewReady()

    // Create parameters specifying the region to take offline
    // using the graphic's geometry. Set the update mode to
    // no updates to avoid the overhead of maintaining the
    // metadata required when synchronizing edits.
    final parameters =
        await offlineMapTask.createDefaultGenerateOfflineMapParameters(
            areaOfInterest: offlineArea,
          )
          ..updateMode = GenerateOfflineMapUpdateMode.noUpdates;

    // Prepare an empty directory to store the offline map.
    final documentsUri = (await getApplicationDocumentsDirectory()).uri;
    final downloadDirectoryUri = documentsUri.resolve('offline_map');
    // If the download directory already exists we delete.
    // If this is undesirable, use a unique identifier for the downloadDirectoryUri
    // such as appending a timestamp.
    if (Directory.fromUri(downloadDirectoryUri).existsSync()) {
      Directory.fromUri(downloadDirectoryUri).deleteSync(recursive: true);
    }
    Directory.fromUri(downloadDirectoryUri).createSync();

Create a new GenerateOfflineMapJob using the parameters and downloadDirectoryUri.

main.dart > onMapViewReady()

    // Prepare an empty directory to store the offline map.
    final documentsUri = (await getApplicationDocumentsDirectory()).uri;
    final downloadDirectoryUri = documentsUri.resolve('offline_map');
    // If the download directory already exists we delete.
    // If this is undesirable, use a unique identifier for the downloadDirectoryUri
    // such as appending a timestamp.
    if (Directory.fromUri(downloadDirectoryUri).existsSync()) {
      Directory.fromUri(downloadDirectoryUri).deleteSync(recursive: true);
    }
    Directory.fromUri(downloadDirectoryUri).createSync();


    // Create a job to generate the offline map passing in
    // the parameters and download directory.
    final generateOfflineMapJob = offlineMapTask.generateOfflineMap(
      parameters: parameters,
      downloadDirectoryUri: downloadDirectoryUri,
    );

Add code to listen for when the generate offline map job completes or fails and to track the percent complete as the job runs. Add a try/catch block to handle exceptions.

main.dart > onMapViewReady()

    // Create a job to generate the offline map passing in
    // the parameters and download directory.
    final generateOfflineMapJob = offlineMapTask.generateOfflineMap(
      parameters: parameters,
      downloadDirectoryUri: downloadDirectoryUri,
    );

    // Listen for status updates as the generate offline map
    // job runs.
    generateOfflineMapJob.onStatusChanged.listen((jobStatus) {
      try {

        // See next step.

      } on ArcGISException catch (e) {
        debugPrint('Error generating offline map: ${e.message}');
      }
    });

If the job succeeds, set the arcgisMap property on the map view controller with the offline map result. If it fails, print out a message. If the job is running, print the percent complete.

Instead of printing messages to the debug console as demonstrated, you could respond to the change in the job status by displaying widgets in the user interface. For example, the Generate offline map sample shows the download progression using the LinearProgressIndicator widget.

main.dart > onMapViewReady() > try{}

    // Listen for status updates as the generate offline map
    // job runs.
    generateOfflineMapJob.onStatusChanged.listen((jobStatus) {
      try {

        // If the job succeeds, show the offline map.
        if (generateOfflineMapJob.status == JobStatus.succeeded) {
          // Retrieve the offline map.
          final result = generateOfflineMapJob.result;

          if (result == null) return;

          // Set the map view controller's ArcGIS map to the offline map.
          _mapViewController.arcGISMap = result.offlineMap;

          debugPrint('Generate offline map: Complete');
        } else if (generateOfflineMapJob.status == JobStatus.failed) {
          // If the job fails, print out the error message.
          debugPrint(
            'Unable to generate a map for that area: ${generateOfflineMapJob.error?.message}',
          );
        } else {
          // Otherwise, get the progress and report it.
          final percentComplete = generateOfflineMapJob.progress;

          debugPrint('Percent complete: $percentComplete%');
        }

      } on ArcGISException catch (e) {
        debugPrint('Error generating offline map: ${e.message}');
      }
    });

Start the generate offline map job.

main.dart > onMapViewReady()

      } on ArcGISException catch (e) {
        debugPrint('Error generating offline map: ${e.message}');
      }
    });

    // Start the generate offline map job.
    generateOfflineMapJob.start();

  }

Hot restart your app.

You should see an offline map for the specified area of the stormwater network within Naperville, IL, USA. Remove your network connection and you will still be able to pinch, drag, and double-tab the map view to explore this offline map.

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

Option 2: Download the solution

Click the Download solution link under Solution and unzip the file to a location on your machine.
Open the project in VS code.

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

Set up authentication

To access the secure ArcGIS location services ArcGIS 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 authentication API 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 authentication User 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 Platform An 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 Online An 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 authentication API 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 credential API 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 keys An 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 authentication User 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 account An 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 privilege 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 to access the ArcGIS services A 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 credentials OAuth 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 token An 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 privileges 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 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 privileges 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 to access the ArcGIS Basemap Styles service The 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 .

Add authentication code and set developer credentials

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

Open lib/main.dart.
In the main() function, set the ArcGISEnvironment.apiKey value to your access token An 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 .
main.dart
void main () { ArcGISEnvironment.apiKey = 'YOUR_ACCESS_TOKEN'; runApp( const MaterialApp(home: MainApp()) ); }

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.

Add the Authenticator toolkit component to manage your OAuth credentials.

Add the ArcGIS Maps SDK for Flutter Toolkit package to your app by following these instructions

Add the following code to main.dart:

Define a final class member inside _MainAppState class, _oAuthUserConfiguration, and initialize it with OAuthUserConfiguration passing in the portalUri, clientId, and redirectUri values.
Add code to revoke all tokens, Authenticator.revokeOAuthTokens(), and clear all credentials, Authenticator.clearCredentials(), from the authenticator’s credential store during application sign-out.
Add the Authenticator widget as a parent of the ArcGISMapView widget in the existing widget tree found in the build(). Set the value of the named parameter, oAuthUserConfigurations to a list containing the new member variable _oAuthUserConfiguration.

main.dart

class _MainAppState extends State<MainApp> {

  final _mapViewController = ArcGISMapView.createController();

  final _oAuthUserConfiguration = OAuthUserConfiguration(
    portalUri: Uri.parse('https://www.arcgis.com'),
    clientId: 'YOUR_CLIENT_ID',
    redirectUri: Uri.parse('YOUR_REDIRECT_URL'),
  );

  @override
  void dispose() {
    Authenticator.revokeOAuthTokens().whenComplete(
      Authenticator.clearCredentials,
    );

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      body: Column(
        children: [
          Expanded(
            child: Authenticator(
              oAuthUserConfigurations: [_oAuthUserConfiguration],
              child: ArcGISMapView(
                controllerProvider: () => _mapViewController,
                onMapViewReady: onMapViewReady,
              ),
            ),
          ),
        ],
      ),
    );

  }
}

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.

For Android only, a system browser is required for user authentication User 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 . Add the following activity to the Android manifest in your project:
android/app/src/main/AndroidManifest.xml
 <activity android:name="com.linusu.flutter_web_auth_2.CallbackActivity" android:exported="true"> <intent-filter android:label="flutter_web_auth_2"> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.BROWSABLE" /> <data android:scheme="YOUR_CALLBACK_URL_SCHEME_HERE" /> </intent-filter> </activity> 
Replace YOUR_CALLBACK_URL_SCHEME_HERE with the scheme of the redirect URL used when you set up authentication earlier. This is necessary so that the browser can communicate back to your app after the login workflow completes.

For example, if you have a redirect URL, such as: my-app://auth, the value of the scheme would be: my-app. This value would replace YOUR_CALLBACK_URL_SCHEME_HERE in the activity.

Run the application

Follow these steps to run the application.

In VS Code’s terminal, run:
flutter pub upgrade
Run:
dart run arcgis_maps install
Make sure you have an Android emulator, iOS simulator or physical device configured and running.
In VS Code, select Run > Run Without Debugging.