BlackBerry Bitmap listener -

i have code similar 1 below, painting on mapfields micon several times. how can add click listener bitmap ? using bb 5.0

public bitmap micon; micon = bitmap.getbitmapresource("pcture1.png");  protected void paint(graphics g) {    super.paint(g);         mdest = new xyrect(....);         g.drawbitmap(mdest, micon, 0, 0); } 

override bitmapfield , modify isfocusable(), navigationclick(), keychar(), , trackwheelclick() methods.

public class imagebuttonfield extends bitmapfield {     public imagebuttonfield(bitmap image)    {       super(image);    }     public boolean isfocusable()     {       return true;    }     protected boolean navigationclick(int status, int time)    {      fieldchangenotify(0);      return true;    }     protected boolean trackwheelclick(int status, int time)    {      fieldchangenotify(0);      return true;    }     protected boolean keychar(char character, int status, int time)    {       if(characters.enter == character || characters.space == character)       {          fieldchangenotify(0);          return true;       }       return super.keychar(character, status, time);    }  }