Android Question Android 9 and Firebase Messaging

Hello all,

update. For Firebase and Android 9 it's mandatory to add permission for foreground services on Manifest ( see https://stackoverflow.com/questions...android-permission-foreground-servic/52382711).
This could be done adding the follow line on in Manifest Editor:

AddPermission(android.permission.FOREGROUND_SERVICE)

The problem was fixed.

No. As FCM is a Google service, there's absolutely no reason to add it. Maybe you want to show us your code?

KMatle said:

No. As FCM is a Google service, there's absolutely no reason to add it. Maybe you want to show us your code?

Click to expand...

Hello @KMatle . FCM Is as Google Service BUT the Firebase implementation in B4A starts a Foreground Service associated to the apk thread, which requires the Permission. Notice that there are specific conditions to get the error raised:

1. Use Firebase Service
2. Receive a FCM
3. The app is in background or closed when the message arrives
4. The Android MUST TO BE 9 and Target SDK 28

A more detailed explanation about this requirement can be read at: https://developer.android.com/about/versions/pie/android-9.0-migration#tya

Look that IF your target SDK is 27, your android is 8 or the app isn't in foreground the error will not raise. But if you use Firebase to start your app and the Android is 9 AND SDK is 28... you have a big problem.

That's it. The situation that I'm explaining is a real production case in a Google Play app used by more than 2K customers developed in B4A. We are using Firebase the last 5 years since the old GCM. If there is something different on Google documentation or someplace else, it's not according to the practical experience.

Marcos Alves said:

B4A starts a Foreground Service associated to the apk thread, which requires the Permission. Notice that there are
specific conditions to get the error raised:

Click to expand...

1. Note that it is not suggested to use TargetSDK 28. For now you should use TargetSDK 26. And wih targetsdk 26 everything is working just fine.

I do use FirebaseMessaging. I m using Android 9.

I do not need to have this permission as i am handling the Service Foregroundmode successfully.

Google requires the use of TargetSDK 28 by end of this year. No rush to do it now.

DonManfred said:

1. Note that it is not suggested to use TargetSDK 28. For now you should use TargetSDK 26. And wih targetsdk 26 everything is working just fine.

I do use FirebaseMessaging. I m using Android 9.

I do not need to have this permission as i am handling the Service Foregroundmode successfully.

Click to expand...

Hello @DonManfred ,

you're right. If use sdk 26 everything will work fine. But Android 9 is the future and Sdk 28 will be mandatory. Then, as we have many products in Play Store used by our customers, we need to anticipate in order to fix a future possible problem before happening. In the case of Firebase Cloud Messaging this unique line in manifest fixed the problem without any additional issue... As sdk 28 will not change, let's register this orientation to the developers.

Marcos Alves said:

But Android 9 is the future and Sdk 28 will be mandatory.

Click to expand...

Yes. By end of this year! But no need to do it NOW.

I suggest to wait until Erel says that everything in B4A is ready for TargetSDK 28.

This will happen in the next months i´m sure. At least it will happen before the timeline reached....

DonManfred said:

Yes. By end of this year! But no need to do it NOW.

I suggest to wait until Erel says that everything in B4A is ready for TargetSDK 28.

This will happen in the next months i´m sure. At least it will happen before the timeline reached....

Click to expand...

We are really worried with this timeline ... Need to have time to change some native libs before and test... Let's see...

Marcos Alves said:

Need to have time to change some native libs before and test

Click to expand...

a reason more to stay at 26 for now until you updated the native libs used.

The changes required to increase the targetSdkVersion to 28 are quite minimal. No need to panic and certainly no need to post partial information that can only cause more confusion (I'm referring to this post: https://www.b4x.com/android/forum/threads/firebase-cloud-messaging-manifest-important.103403/).

Developers should set targetSdkVersion to 26. Instructions and built-in support for targetSdkVersion 28 will be available next month.

I ran into the same issue today in an app that starts a service to generate reminders as notifications. On my Android 9 device I got the FOREGROUND_SERVICE permission error. Adding the permission per Marcos' suggestion resolved the issue. I had previously set my targetSDKVersion to 28 & have published the app with this, so can I now change it back to 26 & publish an update? My understanding was that you can't do this, but I could be wrong.

- Colin.

Computersmith64 said:

so can I now change it back to 26 & publish an update?

Click to expand...

Yes, you can change it back.