Android CI/CD with GitHub Actions & Firebase App Distribution

This demo app showcases how to set up CI/CD for Android using GitHub Actions and Firebase App Distribution. It includes building variants (debug, preProd, release) and distributing APKs automatically to testers.

Each build variant has its own workflow and can be triggered manually.

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📦 Features

• GitHub Actions CI/CD workflow
• Firebase App Distribution integration
• Multiple build variants support
• Upload release notes
• Manual or auto trigger support
• Secure with GCP Service Account via GitHub Secrets

🛠️ Setup Overview

Three workflow files are located in .github/workflows/:

• build-debug.yml
• build-preprod.yml
• build-release.yml

Each file:

• Builds a specific variant (assembleDebug, assemblePreProd, or assembleRelease)
• Runs on manual trigger using workflow_dispatch
• Uploads the APK as a downloadable artifact and on firebase app distribution

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Firebase Credentials Setup : https://github.com/wzieba/Firebase-Distribution-Github-Action/wiki/FIREBASE_TOKEN-migration

Add Secret to GitHub

• Open your GitHub repo → Settings → Secrets → Actions

🔐 Secret Name	💡 Value
CREDENTIAL_FILE_CONTENT	Paste the full JSON content of the Firebase service account key
FIREBASE_APP_ID	Get it from Firebase Console → Project Settings → General → App ID
TESTERS_EMAILS	Comma-separated emails, e.g., user1@example.com,user2@example.com

▶️ How to Trigger a Build

1. Push your code to GitHub.
2. Go to your repo's Actions tab.
3. Select the workflow (e.g., Build Debug APK).
4. Click “Run workflow”.
5. Choose the branch and click “Run workflow”.

GitHub Actions will then:

• Build your project for the selected variant
• Generate an APK
• Upload it for download

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📦 Download APK Artifacts

Once the workflow finishes, you can:

• Click the workflow run
• Scroll to the Artifacts section
• Download the generated APK (.apk)

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✅ Requirements

• Android project with build variants defined (e.g., debug, preProd, release)
• GitHub repository with Actions enabled
• Gradle configured to build the required flavors

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📁 Directory Structure

.github/
└── workflows/
    ├── build-debug.yml
    ├── build-preprod.yml
    └── build-release.yml