如何在BlackBerry中自定义ListField？

import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.component.ListField;

public class CustomListField extends ListField {
    public CustomListField() {
        super();
    }

    // 重写其他方法以实现自定义功能
}

protected void drawListRow(ListField listField, Graphics g, int index, int y, int width) {
    // 自定义行样式，例如设置文本颜色和背景颜色
    g.setColor(Color.WHITE);
    g.setBackgroundColor(Color.BLUE);
    g.clear();

    // 绘制行内容
    String text = (String) get(index);
    g.drawText(text, 0, y, DrawStyle.ELLIPSIS, width);
}

protected boolean navigationClick(int status, int time) {
    int index = getSelectedIndex();
    if (index >= 0) {
        // 处理点击事件，例如弹出对话框
        Dialog.alert("Clicked on item " + index);
    }
    return true;
}

CustomListField customListField = new CustomListField();
add(customListField);