How to update email from Firebase in Android?

Question

I am using this code:

FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();

user.updateEmail("[email protected]")
        .addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                if (task.isSuccessful()) {
                    Log.d(TAG, "User email address updated.");
                }
            }
        });

But still I am not able to update user Email ID for logged in person. Other things working fine but not this.

Answer 1

You need to re-authenticate your user. As according to documentation changing primary email address is a sensitive action.

Re-Authentication :

FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
        // Get auth credentials from the user for re-authentication
        AuthCredential credential = EmailAuthProvider
                .getCredential("[email protected]", "password1234"); // Current Login Credentials \\
        // Prompt the user to re-provide their sign-in credentials
        user.reauthenticate(credential)
                .addOnCompleteListener(new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {
                        Log.d(TAG, "User re-authenticated.");
                        //Now change your email address \\
                        //----------------Code for Changing Email Address----------\\
                        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
                        user.updateEmail("[email protected]")
                                .addOnCompleteListener(new OnCompleteListener<Void>() {
                                    @Override
                                    public void onComplete(@NonNull Task<Void> task) {
                                        if (task.isSuccessful()) {
                                            Log.d(TAG, "User email address updated.");
                                        }
                                    }
                                });
                        //----------------------------------------------------------\\
                    }
                });