android - Recycler View showing only very last item added to realtime database

Question

I have a firebase strucuture as

The recycler view is only displaying the last added or say latest added node to the database instead of displaying each and every node

the database reference i am using is

r2 = FirebaseDatabase.getInstance().getReference().child("Uploads").child("Wheat").child(S).child(D).child(T).child(FirebaseAuth.getInstance().getUid());

and the code for recycler view is as

public class MyPost extends AppCompatActivity {

    private RecyclerView recyclerView;
    private DatabaseReference r, r2, r3;
    private String S, D, T;
    FirebaseRecyclerAdapter<RecyclerCropView, ViewHolder2> Fbra1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_post);
        r = FirebaseDatabase.getInstance().getReference().child("User_Data").child(MainDashboard.type).child(FirebaseAuth.getInstance().getUid());
        recyclerView = (RecyclerView) findViewById(R.id.R_view2);
        r.addListenerForSingleValueEvent(rr);
    }


    private ValueEventListener rr = new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            S = dataSnapshot.child("State").getValue().toString();
            D = dataSnapshot.child("City").getValue().toString();
            T = dataSnapshot.child("Tehsil").getValue().toString();
            //   Toast.makeText(MyPost.this,S+D+T.toString(),Toast.LENGTH_LONG).show();
            r2 = FirebaseDatabase.getInstance().getReference().child("Uploads").child("Wheat").child(S).child(D).child(T).child(FirebaseAuth.getInstance().getUid());
            //   Toast.makeText(MyPost.this,r2.toString(),Toast.LENGTH_LONG).show();

            r2.addChildEventListener(new ChildEventListener() {
                @Override
                public void onChildAdded(DataSnapshot dataSnapshot, String s) {

                    r3=r2.child(dataSnapshot.getKey());
                    Toast.makeText(MyPost.this, r3.toString(), Toast.LENGTH_LONG).show();
                    FirebaseRecyclerOptions<RecyclerCropView> options = new FirebaseRecyclerOptions.Builder<RecyclerCropView>().setQuery(r3, RecyclerCropView.class).build();
                    Fbra1 = new FirebaseRecyclerAdapter<RecyclerCropView, ViewHolder2>(options) {
                        @Override
                        protected void onBindViewHolder(@NonNull ViewHolder2 holder, int position, @NonNull RecyclerCropView model) {
                            holder.setProductImage(model.getProduct_Image());
                            holder.setProduct(model.getProduct());
                            holder.setMax(model.getMaximumPrice());
                            holder.setQuantityUnit(model.getQuantityUnit());
                            holder.setQuantity(model.getQuantity());
                        }

                        @NonNull
                        @Override
                        public ViewHolder2 onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
                            View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_post, parent, false);
                            return new ViewHolder2(v);
                        }
                    };
                    Fbra1.notifyDataSetChanged();
                    recyclerView.hasFixedSize();
                    recyclerView.setLayoutManager(new LinearLayoutManager(MyPost.this));
                    Fbra1.startListening();
                    recyclerView.setAdapter(Fbra1);
                }

                @Override
                public void onChildChanged(DataSnapshot dataSnapshot, String s) {

                }

                @Override
                public void onChildRemoved(DataSnapshot dataSnapshot) {

                }

                @Override
                public void onChildMoved(DataSnapshot dataSnapshot, String s) {

                }

                @Override
                public void onCancelled(DatabaseError databaseError) {

                }
            });

        }


        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    };


    @Override
    protected void onRestart() {
        super.onRestart();
        finish();
    }


}

Recycler view is only showing very last item that was added to database.

Note:-

• The item.xml file has width set to wrap content.
• if i remove the childEventListener the recyclerView shows multiple items with null on the place of TextView(These are those textView on which data retrived was supposed to be set)

Answer 1

Waitting for answers