Android Question FCM v1 - Unsubscribe from all topics

[Puiu]

Hi all!
In the old version of FCM, there was the possibility to unsubscribe from all the topics in which you were enrolled. With the new version, it seems (or I'm wrong) that you have to unsubscribe to each individual topic. How do I treat the following situation: an application is installed on a work phone. Each employee has their own username and password with which they log in on the same phone. Based on the userId, everyone connects to their own "topic". Until now it was simple: before connecting to a specific topic, I unsubscribed from all topics, then I connected to the desired topic. Now how can this be done? I don't know to which topic the user who used the application before me was connected...
Thanks for the ideas!

 

[MarcoRome]

[SOLVED] FCM - Unsubscribe from all topics

Hello! I have an application written a few years ago that used the old version of FCM. The client informed me that he no longer receives notifications if the application is closed. I modified the application according to the instructions provided here and now it works. I want to implement a...

www.b4x.com

 

[Puiu]

I tried the following code before posting here:

Try
jo = jo.InitializeStatic("com.google.firebase.iid.FirebaseInstallations").RunMethod("getInstance", Null)
jo.RunMethod("deleteInstanceId", Null)
Catch
Log("ERROR:" & LastException)
End Try

but I get the error message:
Error occurred on line: 202 (Main)
java.lang.ClassNotFoundException: com.google$firebase$iid$FirebaseInstallations
at anywheresoftware.b4j.object.JavaObject.getCorrectClassName(JavaObject.java:289)
at anywheresoftware.b4j.object.JavaObject.InitializeStatic(JavaObject.java:75)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:348)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.shell.DebugResumableSub$RemoteResumableSub.resume(DebugResumableSub.java:22)
at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:275)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:150)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.keywords.Common$15.run(Common.java:1804)
at android.os.Handler.handleCallback(Handler.java:958)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:230)
at android.os.Looper.loop(Looper.java:319)
at android.app.ActivityThread.main(ActivityThread.java:8919)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)

and

ERRORException) java.lang.Exception: java.lang.ClassNotFoundException: com.google$firebase$iid$FirebaseInstallations

 

[Erel]

You are probably looking for this class and method: https://firebase.google.com/docs/re.../installations/FirebaseInstallations#delete()
However, it looks like a mistake to use it for unsubscribing from all topics.

You should instead store the user topic. It can be done very easily with KeyValueStore.