Blackberry中自定义ListView的字段更改侦听器？

我在一个应用程序中工作，我必须在列表视图中显示联系人。我在垂直字段管理器和标签字段的帮助下创建了列表视图

我有一个Email字段和Phone number字段，我必须在上面呼叫一个点击式侦听器

我已经在我的类上实现了侦听器，但由于单击事件而失败。不显示任何单击事件

目前，我正在使用以下代码：

public class CustomListView extends VerticalFieldManager implements FieldChangeListener{
    private VerticalFieldManager mVFM=null;

    private Font _allFonts=null;
    private Font _headingFonts=null;

    /**
     * @param resultVec
     */
    public CustomListView() {
        super(VerticalFieldManager.VERTICAL_SCROLL);
        setMargin(0, 0, 10, 0);

        int resolutionWidth = Display.getWidth(); // PLANNING FOR THREE FIXED RESOLUTIONS 320, 360 AND 480
        //HANDLE WITH THE CODE DIFFERENT DEVICES
        if(resolutionWidth>=480){
            _allFonts = ApplicationFont.explainationFont_18;
            _headingFonts = ApplicationFont.labelFont_18;
        }else if(resolutionWidth >=360){
            _allFonts = ApplicationFont.explainationFont_18;
            _headingFonts = ApplicationFont.labelFont_18;
        }else{//RESOLUTION WIDTH <=320
            _allFonts = ApplicationFont.explainationFont_15;
            _headingFonts = ApplicationFont.labelFont_15;
        }

        int maxLength = Constants.Country_List.length;
        int minLength = 0;
        if(maxLength >= 0){
            for (int i = minLength; i < maxLength; i++) {
                VerticalFieldManager vfm = getVerticalFieldManager();
                vfm.setMargin(0, 10, 0, 10);

                LabelField countryLabel = new LabelField();
                countryLabel.setText(Constants.Country_List[i]);
                //countryLabel.setFont(_allFonts);
                countryLabel.setMargin(10, 0, 10, 0);
                HorizontalFieldManager countryHFM = new HorizontalFieldManager(Manager.USE_ALL_WIDTH);
                countryHFM.add(countryLabel);
                countryHFM.setBackground(BackgroundFactory
                        .createSolidBackground(Constants.LightGreyBgColorCode));

                LabelField addressLabel = new LabelField();
                addressLabel.setText(Constants.Address_List[i]);
                //addressLabel.setFont(_allFonts);

                LabelField stateLabel = new LabelField();
                stateLabel.setText(Constants.State_List[i]);
                //  stateLabel.setFont(_allFonts);

                LabelField cityLabel = new LabelField(){
                    protected void paint(Graphics graphics) {
                        graphics.setColor(Constants.DarkGreyTextColorCode);
                        super.paint(graphics);
                    }
                };
                cityLabel.setText(Constants.City_List[i]);
                //cityLabel.setFont(_allFonts);

                LabelField phoneLabel = new LabelField(){
                    protected void paint(Graphics graphics) {
                        graphics.setColor(Constants.DarkGreyTextColorCode);
                        super.paint(graphics);
                    }
                };
                phoneLabel.setText("Phone(s):");
                //phoneLabel.setFont(_allFonts);

                LabelField numLabel = new LabelField(){
                    protected void paint(Graphics graphics) {
                        graphics.setColor(Constants.blueTextColor);
                        super.paint(graphics);
                    }
                };
                numLabel.setText(Constants.Phone_List[i]);
                //numLabel.setFont(_allFonts);

                HorizontalFieldManager phoneNumberHFM = new HorizontalFieldManager();
                phoneNumberHFM.add(phoneLabel);
                phoneNumberHFM.add(numLabel);

                LabelField emailLabel = new LabelField(){
                    protected void paint(Graphics graphics) {
                        graphics.setColor(Constants.DarkGreyTextColorCode);
                        super.paint(graphics);
                    }
                };
                emailLabel.setText("Email:");
                //emailLabel.setFont(_allFonts);

                LabelField emailIdLabel = new LabelField(){
                    protected void paint(Graphics graphics) {
                        graphics.setColor(Constants.blueTextColor);
                        super.paint(graphics);
                    }
                };
                emailIdLabel.setText(Constants.Email_List[i]);
                //emailIdLabel.setFont(_allFonts);

                HorizontalFieldManager emailIdHFM = new HorizontalFieldManager();
                emailIdHFM.add(emailLabel);
                emailIdHFM.add(emailIdLabel);


                mVFM = new  VerticalFieldManager(USE_ALL_WIDTH /*|FOCUSABLE*/);
                mVFM.setMargin(20, 0, 20, 0);
                mVFM.add(countryHFM);
                mVFM.add(addressLabel);
                mVFM.add(stateLabel);
                mVFM.add(cityLabel);
                mVFM.add(phoneNumberHFM);
                mVFM.add(emailIdHFM);
                mVFM.add(new NullField(FOCUSABLE));

                vfm.add(mVFM);
                /*SeparatorField separater = new SeparatorField(Constants.LightGreyBgColorCode);
                separater.setMargin(0, 10, 0, 10);*/
                vfm.add(new SeparatorField(Constants.LightGreyBgColorCode));
                add(vfm);
            }
        }
    }

    private VerticalFieldManager getVerticalFieldManager() {
        VerticalFieldManager verticalFieldManager = new VerticalFieldManager(
                VerticalFieldManager.FOCUSABLE
                | VerticalFieldManager.FIELD_HCENTER
                | VerticalFieldManager.VERTICAL_SCROLL
                | VerticalFieldManager.USE_ALL_WIDTH) {

            protected boolean touchEvent(TouchEvent message) {
                if (message.getEvent() == TouchEvent.CLICK) {
                    navigationClick(0, 0);
                }
                return super.touchEvent(message);
            }

            public boolean navigationClick(int status, int time) {
                fieldChangeNotify(1);
                return true;
            }

            protected void onFocus(int direction) {
                super.onFocus(direction);
                setBackground(BackgroundFactory
                        .createSolidBackground(/*0x186DEF*/Constants.WhiteBgColorCode));
                invalidate();
            }

            protected void onUnfocus() {
                super.onUnfocus();
                setBackground(BackgroundFactory
                        .createSolidBackground(Constants.WhiteBgColorCode));
                invalidate();
            }
        };      
        return verticalFieldManager;
    }

    public void fieldChanged(Field field, int context) {
    }
}

公共类CustomListView扩展VerticalFieldManager实现FieldChangeListener{
私有VerticalFieldManager mVFM=null；
私有字体_allFonts=null；
私有字体_headingFonts=null；
/**
*@param resultVec
*/
公共CustomListView（）{
超级（垂直字段管理器。垂直滚动）；
setMargin（0,0,10,0）；
int resolutionWidth=Display.getWidth（）；//规划三种固定分辨率320、360和480
//使用不同的设备处理代码
如果（分辨率宽度>=480）{
_allFonts=ApplicationFont.explainationFont_18；
_headingFonts=ApplicationFont.labelFont_18；
}否则如果（分辨率宽度>=360）{
_allFonts=ApplicationFont.explainationFont_18；
_headingFonts=ApplicationFont.labelFont_18；
}else{//分辨率宽度=0）{
对于（int i=minLength；ipublic MyScreen() {        
    // Set the displayed title of the screen       
    setTitle("Test ZoomScreen");
    ButtonField zoomButton = new ButtonField("Zoom Screen Test");
    FieldChangeListener listener=new FieldChangeListener() {
        public void fieldChanged(Field field, int context) {
            EncodedImage ei = EncodedImage.getEncodedImageResource("Koala.jpg");
            UiApplication.getUiApplication().pushScreen(new ZoomScreen(ei));
        }
    };
    zoomButton.setChangeListener(listener);
    add(zoomButton);
}