Push Notifications via FCM

Setup:

1. Clone the repository. Type git clone https://github.com/pfieffer/FCMtest.git in your terminal or git bash.
2. Obtain google-services.json file from https://console.firebase.google.com and paste it in app/ folder.
3. Run the project in android studio.

The screenshot of sending the push notification from Firebase Console:

The screenshot on Samsung galaxy Duos (Android version 4):