# 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.

- Skill: `hoangnguyen0403/android-notifications` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add hoangnguyen0403/android-notifications`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hoangnguyen0403/android-notifications/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: HoangNguyen0403 (https://skillmd.com/u/hoangnguyen0403)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/hoangnguyen0403/android-notifications

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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

- [Implementation Details](references/implementation.md)