listdemo.java

J2ME lwuit实现屏幕九宫图,功能十分强大

/*
 * Copyright ?2008 Sun Microsystems, Inc. All rights reserved.
 * Use is subject to license terms.
 *
 */
package com.sun.lwuit.uidemo;

import com.sun.lwuit.Button;
import com.sun.lwuit.Command;
import com.sun.lwuit.Dialog;
import com.sun.lwuit.Form;
import com.sun.lwuit.List;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.BorderLayout;
import com.sun.lwuit.list.DefaultListModel;

/**
 *本例演示如何使用List控件
 */
public class ListDemo implements ActionListener  {
    public Form form = new Form("ListDemo");
    private  Command backCommand = new Command("Back", 1);

    private String[] str_list = {
    "aaaaaaaaaaaa",
    "bbbbbbbbbbbb",
    "ccccccccccccc",
    "ddddddddddddd"
    };

    ListDemo(){
        form.setLayout(new BorderLayout());
        form.addCommand(backCommand);
        form.setScrollable(true);

        //列表控件，尽管列表控件占用不少面积，但实际上跟普通的Componet一样
        DefaultListModel myListModel = new DefaultListModel(str_list);
        List list = new List(myListModel);
        list.getStyle().setBgTransparency(100);

        //按钮控件
        Button button = new Button("test");

        form.addComponent(BorderLayout.CENTER,list);
        form.addComponent(BorderLayout.NORTH,button);

        list.addActionListener(this);
        form.setCommandListener(this);
    }

    public void actionPerformed(ActionEvent arg0) {
           
        try{//处理列表事件
            String str=((List)(arg0.getSource())).getSelectedItem().toString();
            Dialog.show("ListDemo", str, "OK", null);
        }catch(Exception e)//处理COMMAND事件
        {
            Command command=arg0.getCommand();
            if(command==backCommand)
                UIDemoMIDlet.backToMainMenu();
        }
    }
}