getDisplayName() and getPhotoUrl() without signing in user to android firebase

Question

I am creating a login page in android using Firebase Email Password Authentication and I want when a user enters its Email address and shift to password the system automatically get the PhotoUrl and DisplayName and display on the Login page Before a user enters His Full Password.

Answer 1

For do what you want one way is doing that:

So you have something like that in firebase database:

ASDEYRDSDDA
   Email: [email protected]
   Display_name: Jonh
   Photo_URL: your_url
WERSWERSDFR
   Email: [email protected]
   Display_name: Maria
   Photo_URL: maria_url

to get the data from firebase you only need to create a reference like that:

FirebaseDatabase database = FirebaseDatabase.getInstance();

DatabaseReference myRef = database.getReference("users");

and the listener:

myRef.addValueEventListener(new ValueEventListener() {

                @Override

                public void onDataChange(DataSnapshot dataSnapshot) {
                       for(DataSnapshot data: dataSnapshot.getChildren()){
                               String email=data.child("Email").getvalue(String.class);
                               if (email.equals("[email protected]")) {
                                     //do ur stuff
                                    String displayname=data.child("Display_name").getvalue(String.class);
                                    String photourl=data.child("Photo_URL").getvalue(String.class);

                               }
                        }


                }



                @Override

                public void onCancelled(DatabaseError databaseError) {



                }

            });

So it checks in all childs if the data that you want exists and if yeas you do what you whant.