A WebView-based Android app for monitoring radiation data from gmc.tvipper.com.

• Loads website in WebView
• Supports Android App Links
• Shows notifications for high radiation levels
• Background API check every 15 minutes via WorkManager

Automatically opens the app when the user clicks on a link like:

https://gmc.tvipper.com/*

• Intent filter in AndroidManifest.xml
• Active assetlinks.json at:

  https://gmc.tvipper.com/.well-known/assetlinks.json
  

• App is signed by Google Play
• SHA-256 fingerprint from deployment_cert.der is used in assetlinks.json

• upload-keystore.jks – Your upload key (private, keep secure)
• upload_certificate.pem – Public key (submit to Google if needed)
• deployment_cert.der – Google’s app signing certificate (public)
• .well-known/assetlinks.json – For App Link validation

• INTERNET
• POST_NOTIFICATIONS (Android 13+)

Play Integrity API is not implemented.

© 2025 Jakob / Tvipper.com