# Working with multiple Firebase projects in an Android app

DevFeed: [Working with multiple Firebase projects in an Android app](<https://devfeed.tech/articles/working-with-multiple-firebase-projects-in-an-android-app-16163.md>)

Original publisher: [Read original article](<https://firebase.blog/posts/2016/12/working-with-multiple-firebase-projects-in-an-android-app>)

Author: Ian Barber

Published: 2016-12-16T00:00:00Z

Content type: tutorial

Language: en

Sources: [Firebase Blog](<https://devfeed.tech/sources/firebase-blog.md>)

Topics: [Firebase](<https://devfeed.tech/topics/firebase.md>), [Android](<https://devfeed.tech/topics/android.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [OAuth 2.0](<https://devfeed.tech/topics/oauth2.md>)

Tags: [android](<https://devfeed.tech/tags/android.md>), [auth](<https://devfeed.tech/tags/auth.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [best-practices](<https://devfeed.tech/tags/best-practices.md>), [firebase](<https://devfeed.tech/tags/firebase.md>), [oauth2](<https://devfeed.tech/tags/oauth2.md>), [tutorials](<https://devfeed.tech/tags/tutorials.md>)

## AI overview

A tutorial explaining how an Android app can access data from multiple Firebase projects and authenticate users across them. It focuses on upgrading a legacy Firebase project alongside an existing Google API project, configuring Google Sign-In, and avoiding disruption to production users.

## Source excerpt

News, tutorials, and updates from the Firebase team.