Not Updating the fields in Sqlite

I am performing with one task in android there i have some classes called EmployeeFragment, Databasehandler. In DB class i have update method. to call this method i have used listview to get all the data and then i can select for update but it's not working fine. Please anybody help me. to call this i have used ListDialog fragment

ListDialogFragment class

public class ListDialogFragment extends DialogFragment{

Context ctx;
DatabaseHandler db;
List<Employee> emp;
Employee employee;
int selectedManager;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    ctx = getActivity();
    View rowView = inflater.inflate(R.layout.fragment_retrieve, container);
     db = new DatabaseHandler(getActivity());
     emp = db.getAllEmployee();      
    ListView name= (ListView) rowView.findViewById(R.id.list);
    ListView designation = (ListView) rowView.findViewById(R.id.designation);
    ListAdapterr adapter = new ListAdapterr(ctx, contacts);
    name.setAdapter(adapter);
    employee = new Employee();
    emp=db.getAllEmployee();
    name.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            // TODO Auto-generated method stub
            //employee = emp.get(position);
            selectedManager =((Employee)emp.get(position)).getID();
            AlertDialog.Builder builder1 = new AlertDialog.Builder(ctx);
            builder1.setMessage("We can perform delete and update.");
            builder1.setCancelable(true);
            builder1.setPositiveButton("Update",
                    new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    UpdateEmployeeFragment update = new UpdateEmployeeFragment(selectedManager);
                    Bundle args = new Bundle();
                    args.putString("name", employee.getName());
                    args.putString("design", employee.getDesignation());
                    update.setArguments(args);
                    update.show(getFragmentManager(), "fr");

                }
            });
            builder1.setNegativeButton("No",
                    new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {

                    dialog.cancel();
                }
            });
      builder1.setNeutralButton("Delete", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            // TODO Auto-generated method stub
            db = new DatabaseHandler(getActivity());

            db.deleteEmployee(selectedManager);

        }

      });
            AlertDialog alert11 = builder1.create();
            alert11.show();
        }       
    });
    //designation.setAdapter(adapter);
    return rowView;

}


}
 this one UpdateEmployyeFragment-



public class UpdateEmployeeFragment extends DialogFragment{
Context ctx;
DatabaseHandler db;
List<Employee> emp;
Employee employee;
EditText empname,empesign;
Button save;
int id;
String nm,de;
@SuppressLint("ValidFragment")

public UpdateEmployeeFragment(int selectedManager)
{
    this.id=selectedManager;
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    ctx = getActivity();
    db = new DatabaseHandler(ctx);
    View rowView = inflater.inflate(R.layout.fragment_update_employee, container);
    empname = (EditText) rowView.findViewById(R.id.empnm);
    empesign = (EditText) rowView.findViewById(R.id.empdesign);
    Bundle args = new Bundle();
    nm=args.getString("name");
    de=args.getString("design");
    empname.setText(nm);
    empesign.setText(de);
    save = (Button) rowView.findViewById(R.id.update);
    save.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            //employee.setName(nm);
            //employee.setDesignation(de);
            db.updateEmployee( nm, de);
        }
    });
    //designation.setAdapter(adapter);
    return rowView;
     }
   }
 and then this one ListAdapterr



 public class ListAdapterr extends BaseAdapter{
  Context ctx;
 List<Employee> con;
 LayoutInflater inflater;
 Employee cont;
public ListAdapterr(Context ctx,List<Employee> con)
{
    this.ctx=ctx;
    this.con=con;
    inflater=(LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
    // TODO Auto-generated method stub
    return con.size();
}

@Override
public Employee getItem(int position) {
    // TODO Auto-generated method stub
    return con.get(position);
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return cont.getID();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    View rowView = convertView;
    rowView =inflater.inflate(R.layout.fragment_list_adapter, parent, false);
    TextView name = (TextView) rowView.findViewById(R.id.nameadapter);
    TextView deignation = (TextView) rowView.findViewById(R.id.desigadapter);
    cont = con.get(position);
    name.setText((cont.getName()));
    deignation.setText(Integer.toString(cont.getID()));
    return rowView;
}

}