Android Studio Realtime Database Retrieving Data for RecylerView

Question

I'm trying to Retrieving Data from database for my recView.

I want to get A child nodes (a,b,c), B child nodes and add it to my model.

but I can't get all. I need to use model.add(modela) or model.add(modelb) but i want all models to add my list. What should i do?

Here is my code;

List<Model> model= new ArrayList<>();
FirebaseDatabase.getInstance()
    .getReference(path_road).child(AAA).child("AA")
    .addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull @NotNull DataSnapshot snapshot) {
          
            for (DataSnapshot AsnapShot : snapshot.getChildren()) {
                
                Model modela = AsnapShot.child("A").getValue( class );
      
                Model modelab= AsnapShot.child("B").getValue( class );                              

                model.add(i want to add here childA and childB);

Answer 1

If the names are always A and B , you can make a parent model class (say ParentModel ) that looks like this:

public class ParentModel {
  @PropertyName("A")
  public Model modela;
  @PropertyName("B")
  public Model modelb;
}

The above is the minimum class that can work, but you can also add getters and setters of course.