将按钮添加到BlackBerry中的ListField

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;

public class CustomListField extends ListField implements ListFieldCallback {
    private ButtonField button;

    public CustomListField() {
        super();
        setCallback(this);
        button = new ButtonField("按钮", ButtonField.CONSUME_CLICK);
    }

    public void drawListRow(ListField listField, Graphics graphics, int index, int y, int width) {
        String text = "列表项 " + index;
        graphics.drawText(text, 0, y, 0, width);
        button.setPosition(width - button.getWidth(), y);
        button.draw(graphics);
    }

    public Object get(ListField listField, int index) {
        return null;
    }

    public int getPreferredWidth(ListField listField) {
        return Display.getWidth();
    }

    public int indexOfList(ListField listField, String prefix, int start) {
        return -1;
    }
}

VerticalFieldManager manager = new VerticalFieldManager();
CustomListField listField = new CustomListField();
manager.add(listField);