Sort A Firebaserecycleradapter

I'm making an app that shows the days of the week coming from FireBase, the problem is that I have them messed up and I want them to be sorted. I have searched in many places and p

Solution 1:

The reason only one item shows up is that you only call bindViewHolder conditionally:

if (this.getItemCount() == position + 1) {
    viewHolder.bindDatos(dias);
}

Remove that condition and the others will show up too.

To get a sorted and filtered result, you have to pass a query into the FirebaseRecyclerAdapter constructor, where you are now passing in a DatabaseReference. So add a constructor to your adapter that takes a Query:

publicMyFireAdapterDiasFiestaRecyclerView(
    Class<DiaFiestaMeta> modelClass, 
    int modelLayout, 
    Class<MyFireViewHolder> viewHolderClass, 
    Query query){
    ...

And then invoke it with a query that orders and filters:

adapter = new MyFireAdapterDiasFiestaRecyclerView(
   DiaFiestaMeta.class,
   layout_that_you_use,
   MyFireViewHolder.class,
   ref.orderByChild("property_to_sort_and_filter_on").equalTo("value_to_filter_on")
);

Solution 2:

I've done what you told me. For this I have included in my FireBase Database a field called "order". This field will be in which the nodes will be sorted:

{
  "descripcion" : "desc1",
  "diasFiestas" : {
    "Domingo5deMarzo2017" : {
      "orden" : 4,
      "tituloDiaFiesta" : "Domingo 5 de Marzo",
      "uidDiaFiesta" : "Domingo5deMarzo2017"
    },
    "Jueves2deMarzo2017" : {
      "orden" : 1,
      "tituloDiaFiesta" : "Jueves 2 de Marzo",
      "uidDiaFiesta" : "Jueves2deMarzo2017"
    },
    "Jueves9deMarzo2017" : {
      "orden" : 8,
      "tituloDiaFiesta" : "Jueves 9 de Marzo",
      "uidDiaFiesta" : "Jueves9deMarzo2017"
    },
    "Lunes6deMarzo2017" : {
      "orden" : 5,
      "tituloDiaFiesta" : "Lunes 6 de Marzo",
      "uidDiaFiesta" : "Lunes6deMarzo2017"
    },

In my Fragment:

adaptadorDiasFiestas = newMyFireAdapterDiasFiestaRecyclerView(DiaFiestaMeta.class, R.layout.fila_diasfiesta_layout, MyFireAdapterDiasFiestaRecyclerView.MyFireViewHolder.class, mDataBaseDiasFiestaSelRef.orderByChild("orden"));

But it does not order anything