The AWS Mobile SDK for Unity is now included in the AWS SDK for .NET. This guide references the archived version of the Mobile SDK for Unity. For more information, see What is the AWS Mobile SDK for Unity?

Set Up the AWS Mobile SDK for Unity

To get started with the AWS Mobile SDK for Unity, you can set up the SDK and start building a new project, or you can integrate the SDK with an existing project. You can also clone and run the samples to get a sense of how the SDK works.

Prerequisites

Before you can use the AWS Mobile SDK for Unity, you will need the following:

After completing the prerequisites, you will need to do the following to get started:

Step 1: Download the AWS Mobile SDK for Unity

First, download the AWS Mobile SDK for Unity. Each package in the SDK is required to consume the corresponding AWS service based on the package’s name. For example, the aws-unity-sdk-dynamodb-2.1.0.0.unitypackage package is used to call the AWS DynamoDB service. You can import all of the packages or just the ones you intend to use.

Step 2: Configure the AWS Mobile SDK for Unity

Create a Scene

When working with the AWS Mobile SDK for Unity, you can get started by including the following line of code in the Start or Awake method of your mono behavior class:

UnityInitializer.AttachToGameObject(this.gameObject);

Create your scene by choosing New Scene from the File menu.

The AWS SDK for Unity contains client classes for each AWS service it supports. These clients are configured using a file named awsconfig.xml. The following section describes the most commonly used settings in the awsconfig.xml file. For more information about these settings, see the Unity SDK API Reference.

Set the Default AWS Service Region

To configure the default region for all service clients:

<aws region="us-west-2" />

This sets the default region for all the service clients in the Unity SDK. This setting can be overridden by explicitly specifying the region at the time of creating an instance of the service client, like so:

IAmazonS3 s3Client = new AmazonS3Client(<credentials>,RegionEndpoint.USEast1);

Set Logging Information

Logging settings are specified as follows:

<logging logTo="UnityLogger"
         logResponses="Always"
         logMetrics="true"
         logMetricsFormat="JSON" />

This setting is used to configure logging in Unity. When you log to UnityLogger, the framework internally prints the output to the Debug Logs. If you want to log HTTP responses, set the logResponses flag - the values can be Always, Never, or OnError. You can also log performance metrics for HTTP requests using the logMetrics property, the log format can be specified using LogMetricsFormat property, valid values are JSON or standard.

The following example shows the most commonly used settings in the awsconfig.xml file. For more information about specific service settings, see the service section below:

<?xml version="1.0" encoding="utf-8"?>
<aws region="us-west-2"
    <logging logTo="UnityLogger"
             logResponses="Always"
             logMetrics="true"
             logMetricsFormat="JSON" />
/>

Working with the link.xml file

The SDK uses reflection for platform-specific components. If you are using the IL2CPP scripting backend, strip bytecode is always enabled on iOS, so you need to have a link.xml file in your assembly root with the following entries:

<linker>
<!-- if you are using AWSConfigs.HttpClient.UnityWebRequest option-->
<assembly fullname="UnityEngine">
    <type fullname="UnityEngine.Networking.UnityWebRequest" preserve="all" />
    <type fullname="UnityEngine.Networking.UploadHandlerRaw" preserve="all" />
    <type fullname="UnityEngine.Networking.UploadHandler" preserve="all" />
    <type fullname="UnityEngine.Networking.DownloadHandler" preserve="all" />
    <type fullname="UnityEngine.Networking.DownloadHandlerBuffer" preserve="all" />
</assembly>
<assembly fullname="mscorlib">
    <namespace fullname="System.Security.Cryptography" preserve="all"/>
</assembly>
<assembly fullname="System">
    <namespace fullname="System.Security.Cryptography" preserve="all"/>
</assembly>
<assembly fullname="AWSSDK.Core" preserve="all"/>
<assembly fullname="AWSSDK.CognitoIdentity" preserve="all"/>
<assembly fullname="AWSSDK.SecurityToken" preserve="all"/>
add more services that you need here...
</linker>

Step 3: Obtain the Identity Pool ID using Amazon Cognito

To use AWS services in your mobile application, you must obtain the Identity Pool ID using Amazon Cognito Identity. Using Amazon Cognito to obtain the Identity Pool ID allows your app to access AWS services without having to embed your private credentials in your application. This also allows you to set permissions to control which AWS services your users have access to.

To get started with Amazon Cognito, you must create an identity pool. An identity pool is a store of user identity data specific to your account. Every identity pool has configurable IAM roles that allow you to specify which AWS services your application’s users can access. Typically, a developer will use one identity pool per application. For more information on identity pools, see the Amazon Cognito Developer Guide.

To create an identity pool for your application:

The next page displays code that creates a credentials provider so you can easily integrate Cognito Identity with your Unity application. You pass the credentials provider object to the constructor of the AWS client you are using. The code looks like this:

CognitoAWSCredentials credentials = new CognitoAWSCredentials (
    "IDENTITY_POOL_ID", // Identity Pool ID
    RegionEndpoint.USEast1 // Region
);

Next Steps