Firebase notifications on Android phone with screen lock

Question

We develop an android app to show Firebase notification to user. The implementation is working very well in emulator everything is works fine, no problem.

When install the app to my phone:
- When the phone is unlocked, app is foreground: Message arrived, works fine
- When the phone is unlocked, app is background: Message arrived, works fine
- When the phone is unlocked, app is destroyed: Message arrived, works fine
- When the phone is locked, I hear the sound of message arrived, but I can't unlock the phone! I press the power button, and nothing happening. The phone is not responding since 5-10 seconds! After that time, the screen is on but I can't do anything on it. I can't turn off the phone, can't restart. The only way to unlock is start camera by pressing twice the power button, after a few seconds the camera is showing than I can swipe out the notification. After that everything is going well with the phone.

My code is similar which is on firebase site: https://firebase.google.com/docs/cloud-messaging/android/client.

What should I do?

Thanks

You mean your phone lags when you receive notification from firebase console? — Dharmaraj, Apr 20 '20 at 14:29
not exactly, during 5-10 secs it hangs. I can't do anything on it. — Hosszuful, Apr 20 '20 at 14:34
What phone are you using? This never happened to me. Are you using in-app messaging? — Dharmaraj, Apr 20 '20 at 14:35
Can you try removing all the code you have added to get a notification first? Then add the libraries `implementation 'com.google.firebase:firebase-core:17.3.0' implementation 'com.google.firebase:firebase-analytics:17.3.0' implementation 'com.google.firebase:firebase-messaging:20.1.5'` — Dharmaraj, Apr 20 '20 at 14:41
Then their is no issue if you are using cloud messaging. Just do what I've said in previous comment and run app and then start a campaign from cloud messaging — Dharmaraj, Apr 20 '20 at 14:43
You said remove all code? Include the service implementation? I haven't tried it other phone... — Hosszuful, Apr 20 '20 at 14:53
Remove the service implementation from your Manifest as well. Just add the libraries I said and send a new notification from the cloud messaging console. [Follow This method](https://www.androidauthority.com/android-push-notifications-with-firebase-cloud-messaging-925075/) — Dharmaraj, Apr 20 '20 at 14:55
It looks like, thank you... But there was nothing in the implementation, just that code from the firebase... — Hosszuful, Apr 20 '20 at 15:05
Good to know :-) I have posted it as an answer, you can accept it so that others know the issue is solved :-) and upvote if you like it ;p — Dharmaraj, Apr 20 '20 at 15:08
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/212092/discussion-between-dharmaraj-and-hosszuful). — Dharmaraj, Apr 20 '20 at 15:22
the firebase-core lib wasn't added... That was the problem... thanks. — Hosszuful, Apr 20 '20 at 15:23

Dharmaraj · Accepted Answer · 2020-04-20T15:24:28.480

To send normal notifications to the app using Firebase Cloud Messaging, code is not required.

Just add the following dependencies:

implementation 'com.google.firebase:firebase-core:17.3.0'
implementation 'com.google.firebase:firebase-analytics:17.3.0' 
implementation 'com.google.firebase:firebase-messaging:20.1.5'

And create a new notification like this.

It looks like Your messaging service may be misbehaving.. or check if you have latest dependencies installed.

Firebase notifications on Android phone with screen lock

1 Answers1