CODEWITHSUNDEEP
javaandroidfirebasefirebase-realtime-database
revilo
revilo

Reputation: 35

Firebase Android Wrong User displayed

It's showing something, but from the wrong user, not the signed-in user. In fact, it is the latest registred user. Any suggestions? Here is my code:

    FirebaseDatabase database = FirebaseDatabase.getInstance();
    DatabaseReference ref = database.getInstance().getReference("userInfos");

    ref.addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(DataSnapshot dataSnapshot, String s) {

            UserInformation userInformation = dataSnapshot.getValue(UserInformation.class);
            vorname.setText(userInformation.vorname);
            nachname.setText(userInformation.nachname);
            alter.setText(userInformation.alter);
            sprachen.setText(userInformation.sprachen);
            System.out.println("Prev: " + s);
        }

Structure of my database

Upvotes: 2

Views: 147

Answers (2)

Levi Moreira
Levi Moreira

Reputation: 12005

Well, the type of listener you're using is the ChildAdded one that will ge triggered when you add a new user (that's why you're getting the last added user) To get the current user data user, use a value event listener and pass the logged user id:

 String UID = FirebaseAuth.getInstance().getCurrentUser().getUid();
 DatabaseReference ref = database.getInstance().getReference("userInfos");

        ref.child(UID).addValueEventListener(new ValueEventListener() {
      @Override
      public void onDataChange(DataSnapshot snapshot) {
         UserInformation userInformation = dataSnapshot.getValue(UserInformation.class);
            vorname.setText(userInformation.vorname);
            nachname.setText(userInformation.nachname);
            alter.setText(userInformation.alter);
            sprachen.setText(userInformation.sprachen);
      }
      @Override
      public void onCancelled(DatabaseError databaseError) {        
      }
    });

Upvotes: 1

Alex Mamo
Alex Mamo

Reputation: 138824

When you are using the following line of code:

System.out.println("Prev: " + s);

The s variable holds a value of type String that is actually coming from the second argument of the overridden method onChildAdded(). According to the offical documentation, the second argument can be also written as:

onChildAdded(DataSnapshot snapshot, String previousChildName)

That's why you are printing a wrong name. So the second argument is actually the name of the previous child.

Upvotes: 1

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