[Bug]: No implementation found for method OneSignal#login on channel OneSignal

[hasimyerlikaya]

What happened?

Hello,

I have a problem with Android 12. The login function is not working. The later version is working. Is there any suggestion for this issue?

Steps to reproduce?

1. Install v5.2.4
2. Call OneSignal.login function
3. Test with an Android 12 device

What did you expect to happen?

Identify user by calling the login function.

OneSignal Flutter SDK version

5.3.4

Which platform(s) are affected?

• iOS
• Android

Relevant log output

E/DartMessenger(22513): 	at com.onesignal.internal.OneSignalImp.login(OneSignalImp.kt:355)
E/DartMessenger(22513): 	at com.onesignal.IOneSignal$DefaultImpls.login(IOneSignal.kt:117)
E/DartMessenger(22513): 	at com.onesignal.internal.OneSignalImp.login(OneSignalImp.kt:56)
E/DartMessenger(22513): 	at com.onesignal.OneSignal.login(OneSignal.kt:157)
E/DartMessenger(22513): 	at com.onesignal.flutter.OneSignalPlugin.login(OneSignalPlugin.java:115)
E/DartMessenger(22513): 	at com.onesignal.flutter.OneSignalPlugin.onMethodCall(OneSignalPlugin.java:87)
I/flutter (22513): OneSignalError: MissingPluginException(No implementation found for method OneSignal#login on channel OneSignal)
I/flutter (22513): MissingPluginException(No implementation found for method OneSignal#login on channel OneSignal)

Code of Conduct

• I agree to follow this project's Code of Conduct

[nan-li]

Hi @hasimyerlikaya the last line in your stack-trace at com.onesignal.internal.OneSignalImp.login(OneSignalImp.kt:355 indicates the native OneSignal Android SDK has not initialized yet.

Did you call OneSignal.initialize("app_id") before calling the login method?
Can you share what is in your setup code and where you call the login method.

Also, you are only experiencing this on Android 12, but not with newer Android versions? What versions?

[hasimyerlikaya]

Hi @nan-li,

I found the problem. As you mentioned, I realized that my init function is being called after the login function. Interestingly, this only occurs with Android 12. I ensured that the init function was called before the login function, and the problem disappeared.

Thank you for your help.