Recycle View android Studio search well but just shows 1 item - android-studio

Question

Here a beginner at Android studio.
I'm creating a simple agenda app, where you can add, edit, delete and search contacts.
I used a recycle view but after adding the search option, the recycle view just shows me one contact.
The contacts are being added as appear when I search for them.
Any idea on how to fix it?
It tried changing the layout but nothing works.
My main activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<SearchView
android:id="#+id/txtBuscar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/listacontactos"
android:layout_width="match_parent"
android:layout_height="591dp" />
</LinearLayout>
</LinearLayout>
Here is the Adapter: https://github.com/soymartanegro/agendaApp/blob/main/src/main/java/com/example/agenda/adaptadores/ListaContactosAdapter.java
Main Java: https://github.com/soymartanegro/agendaApp/blob/main/src/main/java/com/example/agenda/MainActivity.java
Thanks a lot.

Answer 1

I have used the below code it's working perfectly. Please check it. Currently, I'm using dummy data for testing purposes.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<SearchView
android:id="#+id/txtBuscar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/listacontactos"
android:layout_width="match_parent"
android:layout_height="591dp" />
</LinearLayout>
</LinearLayout>
lista_item_contacto.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/viewNombre"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
contactos
public class contactos {
String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
ListaContactosAdapter.java
public class ListaContactosAdapter extends RecyclerView.Adapter<ListaContactosAdapter.ContactoViewHolder> {
ArrayList<contactos> listaContactos;
ArrayList<contactos> listaOriginal;
public ListaContactosAdapter(ArrayList<contactos> listaContactos){
this.listaContactos = listaContactos;
listaOriginal = new ArrayList<>();
listaOriginal.addAll(listaContactos);
}
#NonNull
#Override
public ContactoViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.lista_item_contacto, null , false);
return new ContactoViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ContactoViewHolder holder, int position) {
holder.viewName.setText(listaContactos.get(position).getName());
}
public void filtrado(String txtBuscar){
int longitud = txtBuscar.length();
if (longitud == 0){
listaContactos.clear();
listaContactos.addAll(listaOriginal);
} else {
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
List<contactos> collecion = listaContactos.stream().filter(i->i.getName().toLowerCase().contains(txtBuscar.toLowerCase()))
.collect(Collectors.toList());
listaContactos.clear();
listaContactos.addAll(collecion);
} else {
for(contactos c: listaOriginal){
if (c.getName().toLowerCase().contains(txtBuscar.toLowerCase())){
listaContactos.add(c);
}
}
}
}
notifyDataSetChanged();
}
#Override
public int getItemCount() {
return listaContactos.size();
}
public class ContactoViewHolder extends RecyclerView.ViewHolder {
TextView viewName, viewTelephone, viewEmail;
public ContactoViewHolder(#NonNull View itemView) {
super(itemView);
viewName = itemView.findViewById(R.id.viewNombre);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Context context = view.getContext();
}
});
}
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity implements SearchView.OnQueryTextListener{
SearchView txtBuscar;
RecyclerView listaContactos;
ArrayList<contactos> listaArrayContactos;
ListaContactosAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtBuscar = findViewById(R.id.txtBuscar);
listaContactos = findViewById(R.id.listacontactos);
listaContactos.setLayoutManager(new LinearLayoutManager(this));
listaArrayContactos = new ArrayList<>();
contactos c1 = new contactos();
c1.setName("Hello");
contactos c2 = new contactos();
c2.setName("Android");
contactos c3 = new contactos();
c3.setName("Studio");
listaArrayContactos.add(c1);
listaArrayContactos.add(c2);
listaArrayContactos.add(c3);
adapter = new ListaContactosAdapter(listaArrayContactos);
listaContactos.setAdapter(adapter);
//Revisar si no funciona y cambiar de lugar
txtBuscar.setOnQueryTextListener(this);
}
#Override
public boolean onQueryTextSubmit(String s) {
return false;
}
#Override
public boolean onQueryTextChange(String s) {
adapter.filtrado(s);
return false;
}
}