Android background notifications with Firebase Cloud Messaging not received

Question

I\'ve searched a lot about notifications when the app is in the background or closed. I\'m using Firebase Cloud Messaging by the way. It won\'t work for me. I\'ve used the A

Answer 1

I also had issues with devices not receiving the notifications when they were closed, like they would be after a restart.

Turned out, it wasn't working with a DEBUG version of the solution, so that had to be tested in RELEASE MODE. For those using Android Studio, press the Green Play Button next to the debug button.