刷新表适配器屏幕：黑莓

Question

有没有办法在按钮点击时刷新表适配器屏幕。 如果我再次按下按钮点击表格方法然后它在旧的下面添加一个新的表适配器屏幕.....我有任何方式刷新现有的屏幕。按钮是从表中删除元素，之后我想要刷新它。

    public static void richlistshow(){
        int ik = target_list.size()-1;
       while(ik > 0 )
       {
           Bitmap logoBitmap = Bitmap.getBitmapResource("delete.png");       

           City aCity = (City)target_list.elementAt(ik);
           String modelNumber = aCity.get_city_name().toString();
           String modelName = " X ";
           //String ne = String.valueOf(ik);
           String date_time = "  Date-Time";

           Object[] row = {modelName, modelNumber,date_time,logoBitmap};
           _tableModel.addRow(row);
           ik--;
       }


     TableView tableView = new TableView(_tableModel);
     tableView.setDataTemplateFocus(BackgroundFactory.createLinearGradientBackground(Color.YELLOWGREEN, Color.LIMEGREEN, Color.SEAGREEN, Color.SANDYBROWN));
     TableController tableController = new TableController(_tableModel, tableView);
     tableController.setFocusPolicy(TableController.ROW_FOCUS);
     tableView.setController(tableController);


     // Specify a simple data template for displaying 3 columns
     DataTemplate dataTemplate = new DataTemplate(tableView, NUM_ROWS, NUM_COLUMNS)
     {
         public Field[] getDataFields(int modelRowIndex)
         {
             //final int i =modelRowIndex;
             Object[] data = (Object[]) (_tableModel.getRow(modelRowIndex));

             final String cname = (String)data[1];

             /****** Declaring button for deletion of record from database ******/
             ButtonField delete =new ButtonField("X",ButtonField.CONSUME_CLICK);

             /*******  Setting change listener and defining field change within *******/
             delete.setChangeListener(new FieldChangeListener() {

             /*******  defining what should happen when button is clicked ********/
                public void fieldChanged(Field field, int context) {

                    DatabaseHandler delete_row = new DatabaseHandler();
                    delete_row.deletetarget(cname);

            /****calling function to retrieve values from the databasse table.***/
                    delete_row.retrieveTarget();
            /****************calling method again to show the updated values*************/      
                richlistshow();//for showing refreshed data after deletion of a record

                }
            });

             Field[] fields = {delete, new LabelField((String) data[1]), new LabelField((String) data[2]),new BitmapField((Bitmap)data[3])};
             return fields;

         }

     };

     dataTemplate.useFixedHeight(true);
     // Define regions and row height
     dataTemplate.setRowProperties(0, new TemplateRowProperties(ROW_HEIGHT));

     for(int i = 0; i < NUM_COLUMNS; i++)
     {
         dataTemplate.createRegion(new XYRect(i, 0, 1, 1));
         dataTemplate.setColumnProperties(i, new TemplateColumnProperties(Display.getWidth() / NUM_COLUMNS));
     }



     // Apply the template to the view

     tableView.setDataTemplate(dataTemplate);

     mainManager.add(tableView);

}

public final static class MyCity
{
    private String _name;
    private String _datetime;
    private String _button;
    private Bitmap _bitmap;

    MyCity(String name, String datetime, String button, Bitmap bitmap)
    {
        _name = name;
        _datetime = datetime;
        _button = button;
        _bitmap = bitmap;
    }

    public String getName()
    {
        return _name;
    }
    public String getDatetime()
    {
        return _datetime;
    }
    public String getButton()
    {
        return _button;
    }
    public Bitmap getBitmap()
    {
        return _bitmap;
    }
}


/****************TABLE CONTROLLER CLASS ******************/
 private class CityTableModelAdapter extends TableModelAdapter
    {
        public int getNumberOfRows()
        {
            return _cities.size();
        }
        public int getNumberOfColumns()
        {
            return NUM_COLUMNS;
        }
        protected boolean doAddRow(Object row)
        {
            Object[] arrayRow = (Object[]) row;

            System.out.println("! : "+arrayRow[0]+" @: "+arrayRow[1]+" #: "+arrayRow[2]);

            _cities.addElement(new MyCity((String) arrayRow[0], (String) arrayRow[1], (String) arrayRow[2], (Bitmap) arrayRow[3]));
            return true;
        }
        protected Object doGetRow(int index)
        {
            MyCity mycity = (MyCity) _cities.elementAt(index);

            Object[] row = {mycity.getName(),mycity.getDatetime(),mycity.getButton(),mycity.getBitmap()};

            return row;

        }


    }