Refreshing Table Adapter screen : Blackberry - blackberry

Question

Is there any way to refresh Table Adapter Screen on button click.
If i m callling table method again on button click then it is adding a new table adapter screen below the old on.....I s there any way to refresh the existing screen.The button is deleting elements from table after which i want to refresh it.
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;
}
}