Android App Exit/Terminate state getting issue

[velmurugansrt]

When App is in background I tried to answer the call using flutter_incoming_call_kit, App wake up and getting below issue.

What I can understand is everything working fine when the sip ua register from main thread. Not working when calling from isolate thread(firebaseMessagingBackgroundHandler).

: [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(error, Attempt to invoke virtual method 'android.content.Intent android.app.Activity.registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter)' on a null object reference, null, java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Intent android.app.Activity.registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter)' on a null object reference
E/flutter ( 9876): at com.cloudwebrtc.webrtc.video.camera.DeviceOrientationManager.start(DeviceOrientationManager.java:57)
E/flutter ( 9876): at com.cloudwebrtc.webrtc.video.camera.CameraUtils.(CameraUtils.java:48)
E/flutter ( 9876): at com.cloudwebrtc.webrtc.MethodCallHandlerImpl.initialize(MethodCallHandlerImpl.java:175)
E/flutter ( 9876): at com.cloudwebrtc.webrtc.MethodCallHandlerImpl.onMethodCall(MethodCallHandlerImpl.java:344)
E/flutter ( 9876): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:267)
E/flutter ( 9876): at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:292)
E/flutter ( 9876): at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:319)
E/flutter ( 9876): at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/flutter ( 9876): at android.os.Handler.handleCallback(Handler.java:883)
E/flutter ( 9876): at android.os.Handler.dispatchMessage(Handler.java:100)
E/flutter ( 9876): at android.os.Looper.loop(Looper.java:224)
E/flutter ( 9876): at android.app.ActivityThread.main(ActivityThread.java:7562)
E/flutter ( 9876): at java.lang.reflect.Method.invoke(Native Method)
E/flutter ( 9876): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
E/flutter ( 9876): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

[COACHIKO]

Same

[velmurugansrt]

Hi @COACHIKO, Are you find any solution for this? Please let me know if anything. Thanks for advance.

[EliasBarrera]

same error here

[EliasBarrera]

The error appears when I call the method call.answer(helper.buildCallOptions(true)) in the background isolate, call.hangup works fine

[EliasBarrera]

@cloudwebrtc help here please <3

[velmurugansrt]

@NyxThunder Thank you very much for your response. For the background mode I am using isolate server to communicate from isolate thread to main thread but in TERMINATED state methodChannel can't able to access main thread. Still I am able to trigger call using isolate server. But when accept the call getting above issue.

your code getting the below issue:

Error invoking initializeWebRTC: MissingPluginException(No implementation found for method initializeWebRTC on channel com.example/initialize_webRTC).

[EliasBarrera]

same error @velmurugansrt

[harryandroiddev]

same issue

[viplifes]

same issues
#540
flutter-webrtc/flutter-webrtc#1744
flutter-webrtc/flutter-webrtc#1799

[sipalto]

Any news on this one guys?

[robsonvasquez]

@sipalto
I experienced this issue with getUserMedia only when trying to answer a call while the app was in the background.

Due to Apple’s requirement to update apps for iOS 18, I updated the libraries and noticed that WebRTC stopped working in the background on Android starting from version "12.0.0", resulting in the same error you're seeing.

If your app doesn’t have issues using an older WebRTC version on Android, I recommend using "0.10.8", which works.
You can also try up to version "0.11.7" — I haven’t tested that one myself.

I still haven’t figured out this error on Android — if I do, I’ll let you know.

[sipalto]

Thanks a lot @robsonvasquez
Tbh I have been playing around also with different webrtc versions, but my problem it's because the actual library im using is dart_sip_ua and this one depends on webrtc.

I will try "0.12.0" and check if I still have the error.
I'm only facing it at the moment on Android.

Thanks a again