I'm trying to make a condition on firebase, taking value, but I'm not sure how to do it.

I need to do this, if the value is horizontal do this, if you do not do that.

My firebase:

leitura: "horizontal"

```
String emailUsuario = autenticacao.getCurrentUser().getEmail();
    String idUsuario = CustomBase64.codificarBase64( emailUsuario );
    favoritosRef = firebaseRef.child("usuarios").child(idUsuario);
    valueEventListenerLeitor = favoritosRef.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (dataSnapshot.child("leitura").getValue() == "horizontal") {
                Log.e("TAG", "=======" + dataSnapshot.child("leitura").getValue());
            } else {
                Log.e("TAG", "=======" + "Vertical");
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });

```