Firebase中的getEmail（）上的空指针异常

Question

I want to get email address of a user from firebase.This email address is uses to check the user is authenticated with email or phone number.

   user=mAuth.getCurrentUser ;
    if(user.getEmail!=null){
    ......do something
    }
    else{
    ......do something
    }

But,My problem is when i want to start this activity that closes and raise null pointer exception.How can i fix this problem.?

Answer 1

From the docs :

If no user is signed in, getCurrentUser returns null: .......

getCurrentUser might also return null because the auth object has not finished initializing.

May be because of the reasons above your user object is null and throws NullPointerException. You should attach an AuthStateListener to get the currently signed in user.