App Doesn't Show Firebase Notifications (broadcast Intent Callback: Result=cancelled Forintent)

I can't receive my Firebase Notifications when the app is killed or in background. I signed the APK, and it doesn't work, and when I send my Data notification with JSON the logcat

Solution 1:

OK, I just solved the problem.

If you're using a Huawei device, or a device that uses a EMOI os, just go to

Advanced settings

than go to

Battery

and

Protected Apps

than select your app, switch it on and you'll be able to receive your notifications in the background!