Where to put Firebase.setAndroidContext() function

Question

I\'m trying to play a bit with Firebase and Android.
I have one RegisterActivity, and one MainActivity. My current flow is - start with M

Answer 1

Replace Firebase.setAndroidContext(this); code with mRef = FirebaseDatabase.getInstance().getReference();

And add private DatabaseReference mRef; before onCreate methode.

I hope this will work for Android Studio 3.5 version.