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SDK for Android Reference Guide

You can use the SDK for Android to facilitate the process of generating or establishing client identity using UID2, retrieving advertising tokens for bidstream use, and automatically refreshing UID2 tokens.

The following Android-related plugins, and associated documentation, are also available.

PurposeProduct/Documentation
To use the Google Mobile Ads (GMA) SDK to send UID2 tokens as secure signals in ad requests from Android appsUID2 GMA Plugin for Android Integration Guide
To use the Google Interactive Media Ads (IMA) SDK for Android to send UID2 tokens as secure signals in ad requests from Android appsUID2 IMA Plugin for Android Integration Guide

For FAQs relating to mobile publisher integrations, see FAQs for Mobile Integrations.

Non-Mobile Android Device Support​

This SDK for Android can be used for non-mobile devices for Android platforms as well.

Functionality​

This SDK simplifies integration with UID2 for any publishers who want to support UID2 for apps running on Android devices. The following table shows the functions it supports.

Encrypt Raw UID2 to UID2 Token for SharingDecrypt UID2 Token to Raw UID2Generate UID2 Token from DIIRefresh UID2 TokenMap DII to Raw UID2sMonitor Rotated Salt Buckets
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The SDK for Android is designed to generate and/or manage UID2 identity on behalf of Android apps. It enables UID2 identity to be persisted across app lifecycles by securely storing the identity on a device via platform-native encryption tools.

By default, the SDK automatically refreshes UID2 identity based on expiration dates. However, you can disable this to allow implementing apps to manage the UID2 identity lifecycle manually.

API Permissions​

To use this SDK, you'll need to complete the UID2 account setup by following the steps described in the Account Setup page. You'll be granted permission to use specific functions offered by the SDK, and given credentials for that access.

SDK Version​

This documentation is for the SDK for Android version 1.6.0 and later.

For current and past release notes information, see https://github.com/IABTechLab/uid2-android-sdk/releases.

GitHub Repository/Binary​

This SDK is in the following open-source GitHub repository:

The binary is published on Sonatype:

Minimum Requirements​

To consume the binary package of this SDK in your app:

  • Minimum target Android version: 4.4+ / API 19+ (SDK) 5.0+

To run the development app (see Client-Side Integration Guide for Mobile or to build binary from source code, the minimum requirements are as follows:

  • Android Studio version: Check the Android Gradle Plugin (AGP) version required by the UID2 SDK specified in the code repository (see the stated agp version), and check the Android Gradle Plugin release notes for the corresponding Android Studio version required.
  • Minimum target Android version: 4.4+ / API 19+ (SDK) 5.0+ / API 21+ (Dev-App)

Installation​

There are two options for installing the Android UID2 SDK:

Installing with Gradle​

To install with Gradle, add the SDK as a dependency in the build.gradle file:

implementation 'com.uid2:uid2-android-sdk:1.6.0'

Installing with Maven​

To install with Maven, add the SDK as a dependency in the pom.xml file:

<dependency> 
  <groupId>com.uid2</groupId> 
  <artifactId>uid2-android-sdk</artifactId> 
  <version>1.6.0</version> 
</dependency>

Usage Guidelines​

The UID2Manager singleton is the primary developer API for the SDK for Android. It is responsible for storing, refreshing, and retrieving the UID2 Identity including the UID2 token.

The UID2Manager singleton must be initialized before use because:

  • It allows for easier access later.
  • It allows the consuming application to potentially provide its own network instance, responsible for making requests.

The initialization can be done during the creation of the application instance, as shown in the following example:

class MyApplication : Application() {
  override fun onCreate() {
    super.onCreate()
   // Initialize the UID2Manager class. Use DefaultNetworkSession rather than providing our own
   // custom implementation. This can be done to allow wrapping something like OkHttp.
   UID2Manager.init(this.applicationContext)

There are two ways to establish an initial UID2 Identity:

  1. Generate the UID2 identity using DII—email (hashed or unhashed) or phone number (hashed or unhashed). For integration instructions, see Client-Side Integration Guide for Mobile.

  2. Create a UID2 identity server-side and then pass it into the UID2 SDK. For integration instructions, refer to Client-Server Integration Guide for Mobile.

The UID2 Mobile SDKs can perform refreshes of UID2 identities, after an Identity is established. This is because the refresh functionality relies on the refresh tokens that are part of the UID2 Identity.

Code Samples​

The following code samples provide examples of performing specific activities relating to managing UID2 with the SDK for Android.

Generate an initial UID2 Identity (refer to Client-Side Integration Guide for Mobile):

UID2Manager.getInstance().generateIdentity(
    identityRequest: IdentityRequest,
    subscriptionId: String,
    publicKey: String,
    onResult: (GenerateIdentityResult) -> Unit
)

Set the UID2 Identity (refer to Client-Server Integration Guide for Mobile):

UID2Manager.getInstance().setIdentity(identity: UID2Identity)

Get the UID2 token (advertising token) to pass to the Advertising SDK (for ad request or bidstream use):

UID2Manager.getInstance().getAdvertisingToken()

UID2Manager API​

This section includes the functions and variables that are part of the UID2Manager API.

Functions​

The following functions are available as part of the UID2Manager API:

generateIdentity()​

Generate a UID2 Identity using Directly identifying information (DII). For instructions, see Configure the UID2 mobile SDK in the Client-Side Integration Guide for Mobile.

setIdentity()​

Sets a UID2 Identity, created server-side, to be managed by the SDK. For details, see Configure the UID2 Mobile SDK in the Client-Server Integration Guide for Mobile.

resetIdentity()​

Resets or removes the UID2 Identity currently being managed by the SDK.

refreshIdentity()​

Manually refreshes the UID2 Identity being managed by the SDK.

getAdvertisingToken()​

If the current UID2 Identity is valid, this function returns the UID2 token (advertising token).

setAutomaticRefreshEnabled()​

Toggle for automatic refresh functionality.

Variables​

The following variables are available as part of the UID2Manager API:

identity​

The Identity variable stores and returns the current UID2Identity data object being managed by the SDK.

identityStatus​

The identityStatus variable stores and returns the status of the current UID2 Identity being managed by the SDK.