Disable advertising id collection ---------------------------------
According to the [Firebase docs][1] you can disable advertising id collection by setting:
Add this `meta-data` in your `AndroidManifest.xml` under the `<Application>` tag
<meta-data android:name="google_analytics_adid_collection_enabled" android:value="false" />
And add `configurations` in your `build.gradle`

buildscript { configurations { all*.exclude group: 'com.google.firebase', module: 'firebase-core' all*.exclude group: 'com.google.firebase', module: 'firebase-iid' } repositories { ... } dependencies { ... } }



[1]: https://firebase.google.com/support/guides/disable-analytics

Disable advertising id collection ---------------------------------
According to the [Firebase docs][1] you can disable advertising id collection by setting:
<meta-data android:name="google_analytics_adid_collection_enabled" android:value="false" />
in your `AndroidManifest.xml` under the `<Application>` tag.
EDIT: It seems like people are having mixed success with this approach. Try adding ```configurations { all*.exclude group: 'com.google.firebase', module: 'firebase-core' all*.exclude group: 'com.google.firebase', module: 'firebase-iid' }``` to the Gradle app dependencies area as per comment below.
[1]: https://firebase.google.com/support/guides/disable-analytics