Firebase Cloud Messaging (FCM)

FCM is just a demo of Android Application which implement Firebase Cloud Messaging. It made for Google I/O Extended 2016 Bangkok

Prerequisites

Supported Android 4.1 or newer
Android Studio 3.3.2 or higher
google-services.json in app-level folder

Features

Subscribe and Unsubscribe with topics
Get token
Send message with payload both notification and data
Send message with a token, token group, a topic, condition
Handle message both foreground and background
Customize notification
Support notification channel for Android 0 or newer

Limitation in the message payload

Notification : 2KB limit and a predefined set of user-visible keys
Data : 4KB of custom key-value pairs

Screenshots

Slide

https://docs.google.com/presentation/d/1HPLk1PXaGUjqTlPB6RHsgrTunJNo10kbGZ-JX_7JELw/edit?usp=sharing