skills/ HoangNguyen0403/agent-skills-standard

android-notifications

Integrate Android app notifications using Firebase Cloud Messaging and NotificationCompat. Use when setting up FCM, notification channels, or client-side notification taps; defer Flutter, server sends, WorkManager orchestration, and generic Intent handling.

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Android Notifications

Priority: P2 (MEDIUM)

Implementation Guidelines

  • Channels: Create NotificationChannel with unique ID (required for API 26+). Notifications without valid channel silently dropped. Use NotificationCompat for backwards compatibility.
  • Permissions: Explicitly request POST_NOTIFICATIONS on Android 13+ (API 33). Avoid requesting system permission on app launch; show priming dialog first to explain benefit.
  • Service: Implement FirebaseMessagingService with onMessageReceived and onNewToken for background push handling. Declare service in AndroidManifest with MESSAGING_EVENT intent action.
  • Flow: Handle notification taps in both onCreate and onNewIntent using PendingIntent. Pass data between activities via Intent extras.
  • Payload: Limit notification payload to essential IDs. Perform background data fetching via WorkManager if more data needed.

Anti-Patterns

  • No Missing Channel: Notifications fail silently without channels on API 26+.
  • No Unconditional Requests: Don't spam permission dialog on first launch.
  • No Missing Manifest: Service must declared with MESSAGING_EVENT action.

References

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