title: RecyclerView: No adapter attached; skipping layout CardView
body: <p>i'm trying to inflate a <code>CardView</code> with information taken from <code>FireBase</code>. My problem is that the reference to the database read it but the <code>RecyclerView</code> miss to get it... I'm new on Android, i'll aprecite so much your help.</p>
  
  <p>This is my Java Class:</p>
  
  <pre><code>public class ResumenActivity extends AppCompatActivity {
  
  DatabaseReference refMV;
  RecyclerView recyclerViewResumen;
  ArrayList&lt;Listado&gt; listaResumen;
  AdaptadorResumen adaptadorResumen;
  
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_resumen);
  
      recyclerViewResumen = (RecyclerView) findViewById(R.id.listadoRecyclerView);
      recyclerViewResumen.setLayoutManager(new LinearLayoutManager(this));
  
      refMV.addValueEventListener(new ValueEventListener() {
          @Override
          public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
  
              listaResumen = new ArrayList&lt;Listado&gt;();
  
              Listado l = dataSnapshot.getValue(Listado.class);
              listaResumen.add(l);
  
              adaptadorResumen = new AdaptadorResumen(ResumenActivity.this, listaResumen);
              recyclerViewResumen.setAdapter(adaptadorResumen);
              recyclerViewResumen.setHasFixedSize(true);
          }
  
          @Override
          public void onCancelled(@NonNull DatabaseError databaseError) {
              Toast.makeText(ResumenActivity.this, "Upss.. Algo anda mal!", Toast.LENGTH_SHORT).show();
          }
      });
      }
  }
  </code></pre>
  
  <p>This is the Model:</p>
  
  <pre><code>package app.technologias8.smartbarprototipo.modelos;
  
  public class Listado {
  
  private String Nombre;
  private String Precio;
  
  public Listado() {
  }
  
  public Listado(String nombre, String precio) {
      this.Nombre = nombre;
      this.Precio = precio;
  }
  
  public String getNombre() {
      return this.Nombre;
  }
  
  public void setNombre(String nombre) {
      this.Nombre = nombre;
  }
  
  public String getPrecio() {
      return this.Precio;
  }
  
  public void setPrecio(String precio) {
      this.Precio = precio;
  }
  }
  </code></pre>
  
  <p>The Firebase:</p>
  
  <p><a href="https://i.stack.imgur.com/MVwuC.png" rel="nofollow noreferrer">Firebase Database</a></p>