How to go through the items in a RecyclerView

I am developing an application where I use a RecyclerView to display a list of elements. Each item of this list is personalized, consisting of textview a spinner and% editText . The purpose is to update the data of the elements of that list in my database. The problem is that when I go through the list and try to update these data I take the update of the last modified iten, that is, what is selected in my spinner and editText in the other items. Let's see if someone can help me.

ConfiguraçãoObraSocial.java

public class ConfiguracionOS extends AppCompatActivity {

BaseDeDatos db;
RecyclerView osView;
LinearLayout cancelar, actualizar;
int contador;
Context context;
String nombre, est, cos;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_configuracion_os);
    context = ConfiguracionOS.this;

    db = new BaseDeDatos(context,null,null,1);
    osView = (RecyclerView) findViewById(R.id.configuracionOS);
    osView.setLayoutManager(new LinearLayoutManager(context));
    osView.setItemAnimator(new DefaultItemAnimator());
    ControladorObraSocial controlador = new ControladorObraSocial(context);
    final ConfiguracionOSAdapter adapter = new ConfiguracionOSAdapter(context, controlador.listaObraSocial());
    osView.setAdapter(adapter);


    cancelar = (LinearLayout) findViewById(R.id.btnVolverGestionarOS);
    actualizar = (LinearLayout) findViewById(R.id.btnActualizarEstadoOS);
    cancelar.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
        finish();
        }
        });

    actualizar.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            ControladorObraSocial controlador = new ControladorObraSocial(context);

            contador = osView.getAdapter().getItemCount();

            for (int i=0; i < contador; i++ ) {
            nombre = adapter.nombre;
            cos = adapter.coseguro;
            est = adapter.estado;
            controlador.setDatos(nombre, est, cos);
            controlador.cargarDatos();
           }
           finish();
        }
    });
}
}

ControllerOS.java

public class ControladorObraSocial {

Context context;
public String est, cos, nom;


public ControladorObraSocial(Context c) {
    this.context = c;
}
 public void cargarDatos(){
    BaseDeDatos conn = new BaseDeDatos(context,null,null,1);
    ContentValues values = new ContentValues();
    values.put(Tablas.COLUMNA_ESTADO_OS, est);
    values.put(Tablas.COLUMNA_COSEGURO_OS, cos);
    SQLiteDatabase bd = conn.getWritableDatabase();
    String[] parametro = {nom};
    bd.update(Tablas.TABLA_OS, values, Tablas.COLUMNA_NOMBRE_OS + "= ?", parametro);
    bd.close();

}

public void setDatos(String nombre, String estado, String coseguro){
   nom = nombre;
   est = estado;
   cos = coseguro;

}

SettingsAdapter.java

public class ConfiguracionOSAdapter extends RecyclerView.Adapter<ConfiguracionOSHolder> implements Filterable {

Context c;
public ArrayList<ObraSocial> OS, listaFiltrada;
FiltroConfiguracionOS filtro;
public String  coseguro, estado, nombre;



public ConfiguracionOSAdapter(Context ctx, ArrayList<ObraSocial> OS){
    this.c=ctx;
    this.OS=OS;
    this.listaFiltrada=OS;


}


@Override
public ConfiguracionOSHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_configuracion_os,null);

    //HOLDER
    ConfiguracionOSHolder holder=new ConfiguracionOSHolder(v);
    return holder;


}

@Override
public void onBindViewHolder(final ConfiguracionOSHolder holder, int position) {
    holder.nombreOS.setText(OS.get(position).getNombre());
    holder.estado.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            estado = holder.estado.getSelectedItem().toString();
            nombre = holder.nombreOS.getText().toString();


            if (position == 1) {
                holder.coseguroOS.setEnabled(true);


            }else {
                holder.coseguroOS.setText("");
                holder.coseguroOS.setEnabled(false);

            }
            }
        @Override
        public void onNothingSelected(AdapterView<?> parent) {
        }
    });

    holder.coseguroOS.addTextChangedListener(new TextWatcher() {
        public void afterTextChanged(Editable s) {
            coseguro = holder.coseguroOS.getText().toString();

        }

        public void beforeTextChanged(CharSequence s, int start,
                                      int count, int after) {
        }
        public void onTextChanged(CharSequence s, int start,
                                  int before, int count) {
        }
    });
}


@Override
public int getItemCount() {
    return OS.size();
}

@Override
public Filter getFilter() {
    if (filtro==null){
        filtro = new FiltroConfiguracionOS(listaFiltrada, this);
    }
    return filtro;
}

}

ConfigurationsOSHolder

public class ConfiguracionOSHolder extends RecyclerView.ViewHolder {


public TextView nombreOS;
public Spinner estado;
public EditText coseguroOS;


public ConfiguracionOSHolder(View itemView) {
    super(itemView);
    this.nombreOS = (TextView) itemView.findViewById(R.id.NombreOS);
    this.estado = (Spinner) itemView.findViewById(R.id.spEstadosOS);
    this.coseguroOS = (EditText) itemView.findViewById(R.id.CoseguroOS);




}
}