Declared Varible private FirebaseDB fb; In Constructor fb = FirebaseDB(container); In Simple Function fb.FirebaseURL("https://demo-project.firebaseio.com"); I’m getting this error java.lang.NullPointerException: Attempt to invoke virtual method ‘boolean java.lang.String.equals(java.lang.Object…

Well, there is nothing to do with companion version. You should research about how FirebaseDB actually works in AI2. You called the FirebaseURL property before the DefaultURL. DefaultURL is a hidden property that is called at the time of component initialization automatically by app. If you have no…