Android Firebase - cant get userid using getUid() - Error: on null object reference

Question

I am using Firebase and have a signup / login activities working fine but I also want each user to update a username. It seems I am unable to run:

firebaseR         


        

Answer 1

In your app build.gradle, add this to your dependencies

compile 'com.google.firebase:firebase-auth:9.4.0'

import com.google.firebase.auth.FirebaseAuth;
...
...

if (FirebaseAuth.getInstance().getCurrentUser() == null) {
    //Go to login 
}
else{
    String uid = FirebaseAuth.getInstance().getCurrentUser().getUid();
}