My problem is as follows I have a RecyclerView in which I try to display a list of shifts assigned to a selected doctor of spinner , on a selected day of my calendar. The issue is that it shows me the list but the program closes showing the following error RecyclerView: No adapter attached; skipping layout . And the line where I would be marking this error corresponds to getItemCount of my adapter . I share the code to see if you can help me.
ConsultTurno.java
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.Toast;
import com.example.clinica.clinica.Controladores.ControladorEspecialidad;
import com.example.clinica.clinica.Controladores.ControladorFechas;
import com.example.clinica.clinica.Controladores.ControladorMedico;
import com.example.clinica.clinica.Controladores.ControladorTurno;
import com.example.clinica.clinica.R;
import com.example.clinica.clinica.UI.Adapters.TurnoAdapter;
import com.example.clinica.library.CalendarListener;
import com.example.clinica.library.CustomCalendarView;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
public class ConsultarTurno extends AppCompatActivity {
Context context;
static Context c;
Spinner spEspecialidades, spEspecialistas;
String item, fecha, day;
RecyclerView turnoView;
CustomCalendarView calendario;
int dia, mes, año;
LinearLayout volver;
String medico;
public int posicion_esp;
private SimpleDateFormat formatoDia = new SimpleDateFormat("dd", Locale.getDefault());
private SimpleDateFormat formatoMes = new SimpleDateFormat("M", Locale.getDefault());
private SimpleDateFormat formatoAño = new SimpleDateFormat("yyyy", Locale.getDefault());
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_consultar_turno);
context = ConsultarTurno.this;
turnoView = (RecyclerView) findViewById(R.id.listaTurnosAsignados);
turnoView.setHasFixedSize(true);
turnoView.setLayoutManager(new LinearLayoutManager(context));
turnoView.setAdapter(null);
spEspecialidades = (Spinner) findViewById(R.id.spEspecialidadesConsultarTurno);
spEspecialistas = (Spinner) findViewById(R.id.spEspecialistaConsultarTurno);
calendario = (CustomCalendarView) findViewById(R.id.calendarioTurnosAsignados);
final Calendar currentCalendar = Calendar.getInstance(Locale.getDefault());
calendario.setFirstDayOfWeek(Calendar.MONDAY);
calendario.setShowOverflowDate(false);
calendario.refreshCalendar(currentCalendar);
spEspecialistas.setEnabled(false);
ControladorEspecialidad ctrlEspecialidad = new ControladorEspecialidad(context);
ctrlEspecialidad.cargarSpinnerEspecialidades();
volver = (LinearLayout) findViewById(R.id.btnVolverConsultarTurno);
final ArrayAdapter<String> adaptador = new ArrayAdapter(context, android.R.layout.simple_spinner_item, ctrlEspecialidad.listaEspecialidades);
spEspecialidades.setAdapter(adaptador);
spEspecialidades.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
item = spEspecialidades.getSelectedItem().toString();
ControladorMedico ctrlMedico = new ControladorMedico(context);
if (item == "Seleccione") {
spEspecialistas.setEnabled(false);
} else {
spEspecialistas.setEnabled(true);
ctrlMedico.cargarSpinnerMedicos(item);
final ArrayAdapter<CharSequence> adaptador = new ArrayAdapter(context, android.R.layout.simple_spinner_item, ctrlMedico.listaMedicos);
spEspecialistas.setAdapter(adaptador);
spEspecialistas.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
ControladorMedico ctrlMedico = new ControladorMedico(context);
posicion_esp = ctrlMedico.cargarSpinnerEspecialistas(spEspecialistas.getSelectedItem().toString());
spEspecialistas.setAdapter(adaptador);
spEspecialistas.setSelection(posicion_esp);
spEspecialistas.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
calendario.setCalendarListener(new CalendarListener() {
@Override
public void onDateSelected(Date date) {
ControladorFechas ctrlFechas = new ControladorFechas(context);
ControladorTurno ctrlTurno = new ControladorTurno(context);
if (ctrlFechas.isPastDay(date) == false) {
año = Integer.parseInt(formatoAño.format(date));
mes = Integer.parseInt(formatoMes.format(date));
dia = Integer.parseInt(formatoDia.format(date));
day = ctrlFechas.filtrarDia(año, mes, dia);
fecha = dia + "-" + mes + "-" + año;
medico = spEspecialistas.getSelectedItem().toString();
final TurnoAdapter adapter = new TurnoAdapter(context, ctrlTurno.listaTurnos(fecha, medico));
turnoView.setAdapter(adapter);
adapter.getFilter().filter(day);
} else {
turnoView.setAdapter(null);
errorTurno();
calendario.refreshCalendar(currentCalendar);
}
}
@Override
public void onMonthChanged(Date time) {
}
});
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});}}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
public static void confirmacion(){
Toast.makeText(c, "El Turno ha sido dado de baja!!", Toast.LENGTH_LONG).show();
}
public void errorTurno(){
Toast.makeText(context, "No se puede realizar consulta en esta fecha", Toast.LENGTH_SHORT).show();
}
}
ControllerTurno
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import com.example.clinica.clinica.DTO.Turno;
import com.example.clinica.clinica.sqlite.BaseDeDatos;
import com.example.clinica.clinica.sqlite.Tablas;
import java.util.ArrayList;
public class ControladorTurno {
Context context;
public ControladorTurno(Context context) {
this.context = context;
}
public ArrayList<Turno> listaTurnos(String fecha, String medico) {
BaseDeDatos db = new BaseDeDatos(context, null, null, 1);
String sql = "SELECT * FROM " + Tablas.TABLA_TURNO + " WHERE " + Tablas.COLUMN_DIA_TURNO + " = '" + fecha + "' AND " + Tablas.COLUMN_ESPECIALISTA_TURNO + " = '" + medico + "';";
SQLiteDatabase bd = db.getReadableDatabase();
ArrayList<Turno> listaTurnos = new ArrayList<>();
Cursor cursor = bd.rawQuery(sql, null);
if (cursor.moveToFirst()) {
do {
long id = cursor.getLong(0);
String paciente = cursor.getString(1);
String hora = cursor.getString(4);
listaTurnos.add(new Turno(id, paciente, hora));
} while (cursor.moveToNext());
}
cursor.close();
return listaTurnos;
}
}
TurnoAdapter
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import com.example.clinica.clinica.Controladores.ControladorTurno;
import com.example.clinica.clinica.DTO.Turno;
import com.example.clinica.clinica.R;
import com.example.clinica.clinica.UI.Holders.TurnoHolder;
import com.example.clinica.clinica.UI.View.Turno.ConsultarTurno;
import com.example.clinica.clinica.sqlite.BaseDeDatos;
import java.util.ArrayList;
public class TurnoAdapter extends RecyclerView.Adapter<TurnoHolder> implements Filterable {
Context c;
ArrayList<Turno> turnos, listaFiltrada;
FiltroTurnos filtro;
BaseDeDatos db;
long idi;
public TurnoAdapter(Context ctx, ArrayList<Turno> turnos){
this.c=ctx;
this.turnos=turnos;
this.listaFiltrada=turnos;
}
@Override
public TurnoHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_turno,null);
//HOLDER
TurnoHolder holder=new TurnoHolder(v);
return holder;
}
@Override
public void onBindViewHolder(TurnoHolder holder, int position) {
final Turno t = turnos.get(position);
holder.paciente.setText(turnos.get(position).getPaciente());
holder.hora.setText(turnos.get(position).getHora());
holder.eliminar.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
idi = t.getId();
AlertDialog.Builder builder = new AlertDialog.Builder(c);
builder.setTitle(" - Confirmar - ");
builder.setMessage("Estas seguro dar de baja el turno?");
builder.setPositiveButton("SI", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
ControladorTurno ctrlTurno = new ControladorTurno(c);
ctrlTurno.eliminarTurno(t.getId());
((Activity)c).finish();
c.startActivity(((Activity) c).getIntent());
dialog.dismiss();
ConsultarTurno.confirmacion();
}
});
builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// Do nothing
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
}
@Override
public int getItemCount() {
return turnos.size();
}
@Override
public Filter getFilter() {
if (filtro==null){
filtro = new FiltroTurnos(listaFiltrada, this);
}
return filtro;
}
}
FilterTurns.java
import android.widget.Filter;
import com.example.clinica.clinica.DTO.Turno;
import com.example.clinica.clinica.UI.Adapters.TurnoAdapter;
import java.util.ArrayList;
public class FiltroTurnos extends Filter {
TurnoAdapter adapter;
ArrayList<Turno> listaFiltrada;
public FiltroTurnos(ArrayList<Turno>listaFiltrada, TurnoAdapter adapter){
this.adapter=adapter;
this.listaFiltrada=listaFiltrada;
}
@Override
protected Filter.FilterResults performFiltering(CharSequence constraint) {
Filter.FilterResults r = new Filter.FilterResults();
if (constraint != null && constraint.length()>0){
constraint = constraint.toString().toUpperCase();
ArrayList<Turno> filtroTurnos = new ArrayList<>();
for (int i=0; i< listaFiltrada.size();i++){
if (listaFiltrada.get(i).getFecha().toUpperCase().contains(constraint) || listaFiltrada.get(i).getHora().toUpperCase().contains(constraint)){
filtroTurnos.add(listaFiltrada.get(i));
}
}
r.count=filtroTurnos.size();
r.values=filtroTurnos;
}else{
r.count=listaFiltrada.size();
r.values=listaFiltrada;
}
return r;
}
@Override
protected void publishResults(CharSequence constraint, Filter.FilterResults r) {
adapter.turnos = (ArrayList<Turno>) r.values;
adapter.notifyDataSetChanged();
}
}