Advertising ID

The advertising ID is a user-specific, unique, resettable ID for advertising, provided by Google Play services. It gives users better controls and provides developers with a simple, standard system to continue to monetize your apps. It is an anonymous identifier for advertising purposes and enables users to reset their identifier or opt out of interest-based ads within Google Play apps.

The advertising ID is accessible through a straightforward API that you can implement in your apps. For details, take a look at the overview and the advertising ID API reference.

As a reminder, please note that starting 1 August 2014, new apps and app updates distributed through Google Play must use the advertising ID in lieu of any other persistent identifiers for any advertising purposes, on devices that support the advertising ID.

To learn how to check your app's compliance through the Developer Console, or for details on the associated developer policy changes, please see the Advertising ID topic in the Google Play developer help center.

Using the Advertising ID

The advertising ID is a unique but user-resettable string identifier that lets ad networks and other apps anonymously identify a user. The user's advertising ID is made available to apps through APIs provided in Google Play services.

Users can reset their advertising ID at any time, right from the Ads section of the Google Settings app on their devices. From the same app, users can also opt-out of targeted advertising based on the advertising ID by setting the appropriate ad tracking preference. When the user opts-out of targeted ads, this ad tracking preference is made available to apps through a Google Play services API.

Apps making use of the advertising ID must check for and respect the user's ad tracking preference. Also please note that any use of the advertising ID must abide by the terms of the Google Play Developer Content Policies.

Format of the Advertising ID

Google Play services APIs expose the user's advertising ID as a string format of UUID, with values similar to this:

"38400000-8cf0-11bd-b23e-10b96e40000d"

Requirements

  • The advertising ID APIs are supported in Google Play services 4.0+
  • Support for the advertising ID on specific devices is based on their installed versions of Google Play services

Obtaining the user's advertising ID and ad tracking preference

If you want to use the advertising ID in your app, you must first install the Google Play services SDK. As noted in the requirements above, you should install the SDK for Google Play services 4.0 or higher if you will develop using the advertising ID APIs. For information about how to get started, see Setting Up Google Play services.

The advertising ID APIs are available in the com.google.android.gms.ads.identifier package in the Google Play Services library. To obtain the user's advertising ID and tracking preference, call the method getAdvertisingIdInfo(), which returns an AdvertisingIdClient.Info encapsulating the user's current Advertising ID and tracking preference.

Note: The getAdvertisingIdInfo() method is a blocking call, so you must not call it on the main (UI) thread. If called on the main thread, the method throws IllegalStateException.

Once you've retrieved the AdvertisingIdClient.Info object, you can use its getId() and isLimitAdTrackingEnabled() methods to access the advertising ID and ad tracking preference.

Method Description
public String getId() Retrieves the advertising ID.
public boolean isLimitAdTrackingEnabled() Retrieves whether the user has limit ad tracking enabled or not.

The advertising ID APIs do not include a "reset" method. Only users can initiate a reset of their own advertising IDs, through the Google Settings application.

For more information about the advertising ID APIs, see the reference documentation.

Example implementation

Here's a basic illustration of how you can retrieve the user's advertising ID and ad tracking preference in your app:

import com.google.android.gms.ads.identifier.AdvertisingIdClient;
import com.google.android.gms.ads.identifier.AdvertisingIdClient.Info;
import com.google.android.gms.common.GooglePlayServicesAvailabilityException;
import com.google.android.gms.common.GooglePlayServicesNotAvailableException;
import java.io.IOException;
...
// Do not call this function from the main thread. Otherwise,
// an IllegalStateException will be thrown.
public void getIdThread() {
  Info adInfo = null;
  try {
    adInfo = AdvertisingIdClient.getAdvertisingIdInfo(mContext);
  } catch (IOException e) {
    // Unrecoverable error connecting to Google Play services (e.g.,
    // the old version of the service doesn't support getting AdvertisingId).

  } catch (GooglePlayServicesAvailabilityException e) {
    // Encountered a recoverable error connecting to Google Play services.
  } catch (GooglePlayServicesNotAvailableException e) {
    // Google Play services is not available entirely.
  }
  final String id = adInfo.getId();
  final boolean isLAT = adInfo.isLimitAdTrackingEnabled();
}