---
title: Android-SDK - 3.1.0
slug: feature-experimentation/release-notes/android-sdk-3-1-0
docTags: 
createdAt: 2026-07-20T15:45:19.533Z
---

\## 3.1.0
May 13th, 2019

This minor release updates the SDK to use the Optimizely Java SDK 3.1.0 which includes the following:

\### New Features:
\* Introduced Decision notification listener to be able to record:
\* Variation assignments for users activated in an experiment.
\* Feature access for users.
\* Feature variable value for users.
\* Added APIs to be able to conveniently add Decision notification handler (\`addDecisionNotificationHandler\`) and Track notification handler (\`addTrackNotificationHandler\`).

\### Bug Fixes:
\* Feature variable APIs return default variable value when featureEnabled property is false. (\[#274]\([https://github.com/optimizely/java-sdk/pull/274](https://github.com/optimizely/java-sdk/pull/274)))

\### Deprecated
\* Activate notification listener is deprecated as of this release. Recommendation is to use the new Decision notification listener. Activate notification listener will be removed in the next major release.
\* \`addActivateNotificationListener\`, \`addTrackNotificationListener\` and \`addNotificationListener\` APIs on \`NotificationCenter\`.

[https://github.com/optimizely/android-sdk/releases/tag/3.1.0](https://github.com/optimizely/android-sdk/releases/tag/3.1.0)