Kudan Camera not working propelywhen merged with native android app



I got an requirement where i need to merge the unity application with native android app , I am using kudan plugin in the unity 3d , i have exported the unity projetc to andriod studio and created a new app in android studio and merged the Unity app ti native android app.Once i tested the build , every thing is working fine except ar camera(Kudan camera).Ar camera is not working as expected .I ma using free ver of kudan plugin .I have tested it without mergeing with native app and it is working fine in this case,If i merge unity app with native andorid app camera is not working fine.Any help is appreciated.