Multiple list field slider

Similar Questions

• Using a choice of multiple words in a drop-down list field to launch a java script

  I'm a complete newbie to manuscript of java and relatively new to your building in Acrobat.

  I use a drop-down list field to fill in automatically other fields based on my 1st drop-down list selection.

  The 1st field drop-down allows me to select a variety of suppliers.  Once I have selected the vendor, he auto-remplit the coordinates for this provider.

  I've plagiarized the writing of scripts from this link: https://acrobatusers.com/tutorials/change_another_field.  I even changed my domain names for the moment.  I'll change my return form field names and the script to match once I got it working like I want.

  If I use only one name in my drop down list provider (1 field), the script works perfectly and auto-remplit contact as expected information.  However, many of my suppliers are two words or more... and I need those names in print, so I can't do just a contraction of a Word.  Here is the script I use:

  Here is an example of a supplier of single word name that works as expected:
  Put all vorkriegsbevölkerung data in a single data structure
  var DeptData = {ADLEMI: {contact: "P.O. BOX 2371",}}
  E-mail: "DOWNEY, CA 90242."
  {{deptnum: "PHONE: (562) 923-0333 FAX: (562) 923-8111 '}};
  function SetFieldValues (cDeptName)
  {
  this.getField("DeptContact").value = DeptData [cDeptName] .contact.
  this.getField("DeptEmail").value = DeptData [cDeptName] .email;
  this.getField("DeptNumber").value = DeptData [cDeptName] .deptnum;
  }

  Unique provider name, I used in the example above is "ADLEMI."  If I add 'BEST' to ADLEMI (see below), I get a syntax error.  I really need to be able to use several words in my list drop-down provider to trigger auto-fill.

  Put all vorkriegsbevölkerung data in a single data structure

  var DeptData = {ADLEMI BEST: {contact: "P.O. BOX 2371",}}

  E-mail: "DOWNEY, CA 90242."

  {{deptnum: "PHONE: (562) 923-0333 FAX: (562) 923-8111 '}};

  function SetFieldValues (cDeptName)

  {

  this.getField("DeptContact").value = DeptData [cDeptName] .contact.

  this.getField("DeptEmail").value = DeptData [cDeptName] .email;

  this.getField("DeptNumber").value = DeptData [cDeptName] .deptnum;

  }

  The only difference is that I added a space and the word 'BEST' after ADLEMI.  Is there a way to get around this.  I need to have several words in my drop-down list, or at least the full name of the vendor indicating in the field when I print it.

  Thank you

  Place quotation marks around the name of the element.

  Monday, April 13, 2015, at 17:29, bpwhistler, [email protected]>

• view the json data in the custom list field

  Hi, I did analysis json and I created the custom list field. Now, I want to display only the data analyzed in my custom list field. I'll post my analyzed data from json and here is the code for my custom list field
  data analyzed.
  I have THREE channels of json and I want to show content tittle and date in the list filed. I'll post the screenshot of my list.

  JSONArray jsnarry = new JSONArray(responce);
              System.out.println("\n--length----- "+jsnarry.length());
              //System.out.println("....................................................=");
              for (int i = 0; i < jsnarry.length(); i++){
  
                  JSONArray inerarray = jsnarry.getJSONArray(i);
                      //System.out.println("\n-inerarray-values----- "+inerarray.getString(i1));
                      String TITTLE = inerarray.getString(1);
                      String CONTENT = inerarray.getString(2);
                      String DATE = inerarray.getString(3);
                                                         System.out.println("TITTLE= "+TITTLE);
                      System.out.println("CONTENT= "+CONTENT);
                      System.out.println("DATE= "+DATE);
  
  }
  

  output

  [0.0] --length----- 2
  [0.0]
  [0.0] -innerarray-length----- 6
  
  [0.0] TITTLE= BJP State President Sanjay Tandon's visit to Amita Shukla's Home
  [0.0] CONTENT=  BJP President Chandigarh Sanjay Tandon at Amita Shukla's Home
  [0.0] DATE= 2013-01-04
  [0.0] ................................................
  [0.0] TITTLE= Sanjay Tandon at mahasamadhi of Satya Shri Sai baba.
  [0.0] CONTENT= BJP Chandigarh President, Sanjay Tandon mahasmadhi of Sri Satya Sai Baba.(Andhra Pradesh)
  [0.0] DATE= 2013-01-13
  

  and my custom list field

         super(NO_VERTICAL_SCROLL);
  
           String TITTLE="TITTLE";
           String CONTENT = "CONTENT";
           String DATE = "DATE";
  
           v.addElement(new ListRander(listThumb, TITTLE, CONTENT,DATE, navBar));
  
           myListView = new CustomListField(v){
  
               protected boolean navigationClick(int status, int time) {
                   //Dialog.alert(" time in milisec :" + time);
                   return true;
               }
           };
  

  CustomListField.java

  public class CustomListField extends ListField implements ListFieldCallback {
  
      private Vector _listData;
      private int _MAX_ROW_HEIGHT = 100;
  
      public CustomListField (Vector data) {
  
          _listData = data;
          setSize(_listData.size());
          setSearchable(true);
          setCallback(this);
          setRowHeight(_MAX_ROW_HEIGHT);
  
      }
  
      public int moveFocus (int amount, int status, int time) {
  
          this.invalidate(this.getSelectedIndex());
          return super.moveFocus(amount, status, time);
  
      }
  
      public void onFocus (int direction) {
  
          super.onFocus(direction);
  
      }
  
      protected void onUnFocus () {
  
          this.invalidate(this.getSelectedIndex());
  
      }
  
      public void refresh () {
  
          this.getManager().invalidate();
  
      }
  
      public void drawListRow (ListField listField, Graphics graphics, int index, int y, int w) {
  
          ListRander listRander = (ListRander)_listData.elementAt(index);
          graphics.setGlobalAlpha(255);
          graphics.setFont(Font.getDefault().getFontFamily().getFont(Font.PLAIN, 24));
          final int margin =5;
  
          final Bitmap thumb= listRander.getListThumb();
          final String listHeading = listRander.getListTitle();
          final String listDesc= listRander.getListDesc();
          final String listDesc2= listRander.getListDesc2();
          final Bitmap nevBar = listRander.getNavBar();
  
          //list border
          graphics.setColor(Color.BLACK);
          graphics.drawRect(0, y, w, _MAX_ROW_HEIGHT);
  
          graphics.drawBitmap(margin, y+margin+10, thumb.getWidth(), thumb.getHeight(), thumb, 0, 0);
  
          graphics.drawText(listHeading, 3*margin+thumb.getWidth(), y+margin);
          graphics.setColor(Color.BLACK);
  
          graphics.drawText(listDesc, 3*margin+thumb.getWidth(), y+ margin+30);
          graphics.drawText(listDesc2, 3*margin+thumb.getWidth(), y+ margin+60);
  
      }
  
      public Object get(ListField listField, int index) {
  
          String rowString = (String) _listData.elementAt(index);
          return rowString;
  
      }
  
      public int indexOfList (ListField listField, String prefix, int start) {
  
          for (Enumeration e = _listData.elements(); e.hasMoreElements(); ) {
  
              String rowString = (String) e.nextElement();
              if (rowString.startsWith(prefix)) {
  
                  return _listData.indexOf(rowString);
  
              }
  
          }
  
          return 0;
  
      }
  
      public int getPreferredWidth(ListField listField) {
  
          return 3 * listField.getRowHeight();
  
      }
  
  }
  

  Listrander.Java

  public class ListRander {}

  private bitmap listThumb = null;
  incognito bar Bitmap = null;
  private String listTitle = null;
  private String listDesc = null;
  private String listDesc2 = null;

  public ListRander (Bitmap listThumb, String listTitle, String listDesc, String listDesc2, Bitmap navBar) {}
  this.listDesc = listDesc;
  this.listDesc2 = listDesc2;
  this.listThumb = listThumb;
  this.listTitle = listTitle;
  this.navBar = bar navigation;
  }
  public getListThumb() {Bitmap image
  Return listThumb;
  }
  {} public void setListThumb (listThumb Bitmap)
  this.listThumb = listThumb;
  }
  public getNavBar() {Bitmap image
  return the navigation bar;
  }
  {} public void setNavBar (navigation bar of the Bitmap)
  this.navBar = bar navigation;
  }
  public String getListTitle() {}
  Return listTitle;
  }
  {} public void setListTitle (String listTitle)
  this.listTitle = listTitle;
  }
  public String getListDesc() {}
  Return listDesc;
  }
  {} public void setListDesc (String listDesc)
  this.listDesc = listDesc;
  }
  public String getListDesc2() {}
  Return listDesc2;
  }
  public void setListDesc2 (String listDesc2) {}
  this.listDesc2 = listDesc2;
  }
  }

  

  You seem to have two problems here and are confusing them.  You must break the problem into two parts

  (1) extract the data from the entry and create the objects you want to display

  2) display in a list, a set of objects.

  Let's get the sorted first premiera.

  I will suggest what to do here, but in practice, you might actually think about this yourself as part of the design phase of your application.  You should do this, not me, because then you will have all the information available.  At the present time, I have just what you said, which is not much.  So maybe what I'm telling you is not correct for your application.  Only you can decide that.  And be blunt here, you should have decided this before you start coding.  Do you want you could lead down the wrong path.  You must think of your application as a home - as the architect must design all the rooms, and how they will be built, before you start building the House.  You do not, then we are building the rooms on the fly.  Who knows if they will be fit at home?

  In this case, I think you need to create an object that represents each of the elements in the internal array of new data.  call this object

  NewsItem

  This object will have attributes, such as its title, content, date, the linked image and so on, each of whom have will get and set methods.  While you treat each inner element fetch you the associated entry and update the object.

  When you have finished the inner loop of processing, you now have a complete

  NewsItem

  Object, so you will add it to a collection, an array of NewsItem objects, call this _newsItems.  You will create it at the beginning - you know how many entries it takes because it is the number of entries in your outdoor table.

  So before you start to deal with JSON, create your table and the 'index' value of 0.

  Once you have created your Newsitem, add this in the table to the position 'index' and increment "index".

  And once you have analyzed all the JSON, you will have a complete picture.  This is part 1 finished!

  And note in your drawListRow, you are given a clue - that is the index in your tables in _newsItems.  So you can easily find which entry to view and display it correctly.  But it is part 2 and is a separate issue.

• animation in the list field

  actually my question is related to my previous thread .i have created a field of list with custom images.
  My question http://supportforums.blackberry.com/t5/Java-Development/custom-list-field/m-p/2623111#M223562

  animation in a listfield wouldn't be something I think.
  If you want to do in any case you will need to adjust your drawListRow and call invalidate (rowindex) for each image.
  As you redraw the complete list instead of only the bitmap line, it is much more expensive, you will need to test if it works well enough.

• Custom with LostFocus list field problems

  Hello experts!

  I made a custom, list field when I draw the lines, I made a solution using a personalized reminder, well... I have a problem when the list field lost focus, because when I have a focus to the button my list have a last item carried.

  I want to erase,

  Any suggestions?

  Best regards, Rampelotti

  in the drawListRow() method adds the underside before the draw.

  if(graphics.isDrawingStyleSet(Graphics.DRAWSTYLE_FOCUS))
  

• Drop-down list field

  Hi friends,

  In my application from the drop-down list field that I used "ObjectChoiceField" it works but it does not feel like a drop-down list field

  How can I do?

  by the look, he must feel like a drop-down list field?

  Thanks in advance

  I've seen this done before overriding the method object of the ObjectChoiceField to use drawBitmap. In this way paint you a picture on the right of the field (such as the traditional arrow pointing down). You can also use drawRect to draw a rectangle around the whole thing make it look like more traditional.

• Problem with custom VerticalFieldManager, custom list field Call Back

  I created a custom vertical field Manager and a custom list field. It works very well in JDE 6.0.But when I build the same code in JDE 4.5 it throws the error because the setExtent Sub protected method (int width, int jeight) that I used in my code is final in JDE 4.5.

  so I changed my sublayout custom implemented code in vertical field Manager method. Again, this works very well in JDE 6.0.When I have to generate in JDE 4.5 is not to throw any errors.but when I run my code

  the list field does not have focus.

  I added a text field and a list custom field to the Vertical Field Manager text field focus but custom list field does not receive the focus. And the confusing part is when I click on the arrow to the getSelectedIndex from the scope of the list is changing and when I print listfield is active or not is the wrong impression.

  What is bad code works fine in jde 6.0 but not in jde 4.5, please let me know what I need to do something.

  Me as the ListField focus, but is not in fact poster it seems.  Have you made a

  . getLeafFieldWithFocus()

  to see if indeed he has the focus?

  I think we will have to see the ListField code for help.

• can I add a multiple text fields in a label?

  Can I add a multiple text fields in a label?

  If you use the FormsCentral Designer, you can add less than with the tag additional text fields and give them all the labels.

  About the future of the forms with Acrobat, you always have the possibility of creation of the presentation of the form in InDesign, Word, etc., by generating a PDF file and adding the fields. This is how it was done since the forms were introduced with Acrobat 3. If you have 11 Acrobat is installed, you can continue to use the application designer FormsCentral.

• I created a PDF form with several drop downs, all with the same drop-down values. When I select a value of 1 in the drop-down list fields, it breeds in all others - which I don't want. How can I fix?

  I created a PDF form with several drop downs, all with the same drop-down values. When I select a value of 1 in the drop-down list fields, it breeds in all others - which I don't want. Can I fix?

  I am fairly new to this, but I think it has to do with the way you have drop them downs named. Copy you a then keep stick in each area? If so, that's the problem. You must rename each with a different number: Dropdown1, Dropdown2, etc. I think this might solve the problem.

• Context menu in the list field

  Hi, I want to make the context menu, which will apper when the user clicks on an item in the list filed. It will be displayed right on the field.

  I don't see my context menu when the user clicks the button menu blackberry.

  Thank you.

  Finally that I do.

  I take a look at the example of ContactListDemo. Now it's working.

  I put this code in my screen main clas.

     protected void makeMenu(Menu menu, int instance)
          {
  
            menu.add(_viewEmailMenuItem);
            super.makeMenu(menu, instance);
          }
  
        private class ViewEmailMenuItem extends MenuItem
          {
              public ViewEmailMenuItem()
              {
                  super("View Email", 0x00000000, 0);
              }
  
              public void run()
              {
                  Dialog.inform("You clicked.");
              }
          }
  

  I'll open another thread about removing default menu items. See all keyboard, switching Applications and full menu.

• custom list field

  Hi, I work with list filed, I need to customize the field List, I'll explain a little more. I have this picture.
  

  I get the list of applications installed with codemodule feeder and now I want to show that, in the list, as you can see in the picture.you above can see the lock in the dark peak, I need to customize this pic with onclick.
  I mean when I click on any line I want to delete this pic of lock in the dark of that line clicked in the list filed
  and when I click again on the same line I want to insert this pic of lock in the same row.
  I think I need to call the drawListRow method in the onclick or sonething else? Please guide me
  Here's the code I used

  public final class MyScreen extends MainScreen {
  
      CustomListField myListView;
  
      public MyScreen() {
  
          Bitmap listThumb = Bitmap.getBitmapResource("icon.png");
          String listTitle="Headline";
          String listDesc = "Mobile news feeds";
          String listDesc2 = " ";
          final Bitmap navBar = Bitmap.getBitmapResource("lock.png");
          Vector v = new Vector();
          for(int i=0; i<30; i++){
              v.addElement(new ListRander(listThumb, listTitle, listDesc,listDesc2, navBar));
          }
          //v.addElement(new ListRander(listThumb, listTitle, listDesc,listDesc2, navBar));
  
          myListView = new CustomListField(v){
  
              protected boolean trackwheelClick (int status, int time) {
  
                  Dialog.alert(" You have selected :" + getSelectedIndex());
  
                  return super.trackwheelClick(status, time);
              }
          }
          ;
          add(myListView);   
  
      }
  }
  

  package mypackage;
  
  import net.rim.device.api.system.Bitmap;
  
  public class ListRander {
  
      private Bitmap listThumb= null;
      private Bitmap navBar = null;
      private String listTitle=null;
      private String listDesc= null;
      private String listDesc2= null;
  
      public ListRander(Bitmap listThumb,String listTitle, String listDesc, String listDesc2, Bitmap navBar) {
          this.listDesc = listDesc;
          this.listDesc2 = listDesc2;
          this.listThumb = listThumb;
          this.listTitle = listTitle;
          this.navBar = navBar;
      }
      public Bitmap getListThumb() {
          return listThumb;
      }
      public void setListThumb(Bitmap listThumb) {
          this.listThumb = listThumb;
      }
      public Bitmap getNavBar() {
          return navBar;
      }
      public void setNavBar(Bitmap navBar) {
          this.navBar = navBar;
      }
      public String getListTitle() {
          return listTitle;
      }
      public void setListTitle(String listTitle) {
          this.listTitle = listTitle;
      }
      public String getListDesc() {
          return listDesc;
      }
      public void setListDesc(String listDesc) {
          this.listDesc = listDesc;
      }
      public String getListDesc2() {
          return listDesc2;
      }
      public void setListDesc2(String listDesc2) {
          this.listDesc2 = listDesc2;
      }
  }
  

  package mypackage;
  
  import java.util.Enumeration;
  import java.util.Vector;
  
  import net.rim.device.api.system.Bitmap;
  import net.rim.device.api.ui.Color;
  import net.rim.device.api.ui.Font;
  import net.rim.device.api.ui.Graphics;
  import net.rim.device.api.ui.XYRect;
  import net.rim.device.api.ui.component.ListField;
  import net.rim.device.api.ui.component.ListFieldCallback;
  
  public class CustomListField extends ListField implements ListFieldCallback {
  
      private Vector _listData;
      private int _MAX_ROW_HEIGHT = 60;
      public CustomListField (Vector data) {
  
          _listData = data;
          setSize(_listData.size());
          setSearchable(true);
          setCallback(this);
          setRowHeight(_MAX_ROW_HEIGHT);
  
      }
  
      protected void drawFocus (Graphics graphics, boolean on) {
  
          XYRect rect = new XYRect();
          graphics.setGlobalAlpha(150);
          graphics.setColor(Color.BLUE);
          getFocusRect(rect);
          drawHighlightRegion(graphics,HIGHLIGHT_FOCUS,true,rect.x,rect.y,rect.width,rect.height);
  
      }
  
      public int moveFocus (int amount, int status, int time) {
  
          this.invalidate(this.getSelectedIndex());
          return super.moveFocus(amount, status, time);
  
      }
  
      public void onFocus (int direction) {
  
          super.onFocus(direction);
  
      }
  
      protected void onUnFocus () {
  
          this.invalidate(this.getSelectedIndex());
  
      }
  
      public void refresh () {
  
          this.getManager().invalidate();
  
      }
  
      public void drawListRow (ListField listField, Graphics graphics, int index, int y, int w) {
  
          ListRander listRander = (ListRander)_listData.elementAt(index);
          graphics.setGlobalAlpha(255);
          graphics.setFont(Font.getDefault().getFontFamily().getFont(Font.PLAIN, 24));
          final int margin =5;
          final Bitmap thumb= listRander.getListThumb();
          final String listHeading = listRander.getListTitle();
          final String listDesc= listRander.getListDesc();
          final String listDesc2= listRander.getListDesc2();
          final Bitmap nevBar = listRander.getNavBar();
          //list border
          graphics.setColor(Color.BLACK);
          graphics.drawRect(0, y, w, _MAX_ROW_HEIGHT);
  
          //thumbnail border & thumbnail image
          graphics.setColor(Color.BLACK);
          graphics.drawRoundRect(margin-2, y+margin-2,thumb.getWidth()+2, thumb.getHeight()+2, 5, 5);
          graphics.drawBitmap(margin, y+margin, thumb.getWidth(), thumb.getHeight(), thumb, 0, 0);
  
          //drawing texts
         // graphics.setFont(FontGroup.fontBold);
          graphics.drawText(listHeading, 2*margin+thumb.getWidth(), y+margin);
          graphics.setColor(Color.BLACK);
  
          // graphics.setFont(FontGroup.smallFont);
          graphics.drawText(listDesc, 2*margin+thumb.getWidth(), y+ margin+20);
          graphics.drawText(listDesc2, 2*margin+thumb.getWidth(), y+ margin+32);
  
          //draw navigation button
          final int navBarPosY = y+(_MAX_ROW_HEIGHT/2 - nevBar.getHeight()/2);
          final int navBarPosX = Graphics.getScreenWidth()- nevBar.getWidth()+ margin;
          graphics.drawBitmap(navBarPosX-10, navBarPosY, nevBar.getWidth(), nevBar.getHeight(), nevBar, 0 , 0);
  
      }
  
      public Object get(ListField listField, int index) {
  
          String rowString = (String) _listData.elementAt(index);
          return rowString;
  
      }
  
      public int indexOfList (ListField listField, String prefix, int start) {
  
          for (Enumeration e = _listData.elements(); e.hasMoreElements(); ) {
  
              String rowString = (String) e.nextElement();
              if (rowString.startsWith(prefix)) {
  
                  return _listData.indexOf(rowString);
  
              }
  
          }
  
          return 0;
  
      }
  
      public int getPreferredWidth(ListField listField) {
  
          return 3 * listField.getRowHeight();
  
      }
  
  }
  

  When I click on the particular line of the list, lock on the right side image should disappear. When I click again on the same line in the list, it should appear again.
  something as in this link
  http://StackOverflow.com/questions/8222635/how-to-display-and-hide-an-image-in-list-on-clicking-on-i...

• BB10: How to create multiple lists (one next to the other)

  Hello world

  I need to create a menu similar to the following image:

  

  In this menu list:

  1. The user could drag vertically and navigate between ELEMENTS (ITEM1, ITEM2, ITEM3,...). In addition, headers of title (like tete2) would remain on the top, I mean, they hide when sliding down.
  2. The user can drag as horizontally. And a new list of ITEMS will be displayed. And the header titles will be moved as well.

  So, in a nutshell, what I need is something like several vertical inside a horizontal list lists.

  Any ideas?

  Thanks in advance.

  Hi guys,.

  I finally understood how do.

  Here's how I did it:

  1. I created several containers, one for each vertical list. The 1st container is visible to the user. The 2nd is hidden just then (right) at the 1st. the 3rd one is hidden just then (right) on the 2nd. And so on.
  2. I used getures to catch any user to slide. Whenever the user calls, either to the left or to the right, I use animations to hide the visible screen and make it visible, the following. You should also block the selection of list items any time you catch the user, cause you don't want the user to swipe and select both Sam.
  3. The headers have been the biggest problem. I created a container of the stack layout page-fromLeftToRight for the headers. This container has a very large "minWidth", and in it I put a label for each header. In order to locate each header in the Middle, no matter how long the text it contains, I used 'LayoutUpdateHandler' Manager for each label. This handler gives the current width of the label you and from there, you can calculate and set the position of the label he.
  4. I used gestures and animations to move headers. Just as I did with the lists.

  The good things is that it works, and it does so very smoothly.

  I know the tabs would be a much easier solution, but my client wanted something more will you allow. Thank you very much for your good help.

  Hope this helps someone.

  Thanks again guys.

• Adding custom Contact list fields

  I noticed that the RIM Windows Live Messenger application has been able to add a custom field in the BlackBerry contacts.

  The field name is "Windows Live Messenger".

  I also want to add a field to all the contacts in the contacts list of BB.  However, I can only find API to change the label of the 4 USER fields and add categories.

  I missed the API correctly, or is adding new contact fields can do something only RIM?

  This can be done using the BlackBerry API defined audience.

• problem with the movement of the navigation in the list field

  I have four tab in which first and second tabAreais containing the field list and third tabArea contains a vetical set field Manager and Manager of horizontal field and the fourth browser tabArea field...

  I faced problem when I try to scroll horizontally to the left... in the field of list or checkboxes in third brief tabArea always try to move to the fourth tab... which is weird...

  so is it possible to block the movement of the left navigation.

  So please help me thank you for any suggestions

  Hello

  If you want to block navigation to anywhere just return true.

  Thank you.

• Help list field

  [Hello everyone please I need help on the field of list]

  Here is my case:

  I want to show 10 records in a list and pressing other next 10 remaining records, I've created an example of code that shows me the first 5 records, but the next button I don't know what logic I have to apply it please help me

  package lists;
  
  import java.util.Vector;
  
  import net.rim.device.api.system.Display;
  import net.rim.device.api.ui.Field;
  import net.rim.device.api.ui.FieldChangeListener;
  import net.rim.device.api.ui.Graphics;
  import net.rim.device.api.ui.component.ButtonField;
  import net.rim.device.api.ui.component.ListField;
  import net.rim.device.api.ui.component.ListFieldCallback;
  import net.rim.device.api.ui.container.MainScreen;
  
  public class MyLists extends MainScreen implements ListFieldCallback,FieldChangeListener{
      private ListField listField = null;
      private ButtonField btn=null;
      private Vector vData = null;
      public MyLists()
      {
  
          vData = new Vector();
          vData.addElement("A1");
          vData.addElement("A2");
          vData.addElement("A3");
          vData.addElement("A4");
          vData.addElement("A5");
          listField = new ListField(vData.size(),ListField.FIELD_HCENTER);
          listField.setCallback(this);
          listField.setChangeListener(this);
          btn=new ButtonField("Next", ButtonField.CONSUME_CLICK);
          btn.setChangeListener(this);
          //add(editField);
          add(listField);
          add(btn);
  
  }
  public Object get(ListField listField, int index){
              return vData.elementAt(index);
           }
  public int getPreferredWidth(ListField listField){
                  return Display.getWidth();
              }
  
  public int indexOfList(ListField listField, String prefix, int start){
                  return vData.indexOf(prefix, start);
              }
  
  public void drawListRow(ListField listField, Graphics graphics, int index, int y, int width){
      String theString = (String)get(listField, index);
      graphics.drawText(theString, 0, y, 0, width);
              }
  
  public void fieldChanged(Field field, int context) {
                  if(field==btn)
                  {
                  What to do HERE PLEASE HELP ME
                  }
              }
  }
  

  remove items from the vector, add new items, invalidate