secondpage.java

J2me 开发 简单的程序。实现页面跳转

package test;

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.TextField;
public class SecondPage extends Form implements CommandListener
{
    // display
    private Display display;

    // Back
    private Command m_cmdBack;

    // Alert
    private Command m_cmdAlert;

    // list
    private List list = null;

    public SecondPage(Display display, Displayable list)
    {
        super("Second");
        this.display = display;
        this.list = (List) list;
        //
        m_cmdBack = new Command("Back", Command.BACK, 1);
        m_cmdAlert = new Command("Alert", Command.SCREEN, 1);
        this.append(new TextField("E_mail", "[e-mail]", 15,
                TextField.EMAILADDR));
        // 增加按钮
        this.addCommand(m_cmdBack);
        this.addCommand(m_cmdAlert);
        this.setCommandListener(this);
        // 显示Form屏幕
        display.setCurrent(this);
    }

    public void commandAction(Command c, Displayable d)
    {
        if (m_cmdAlert == c)
        {
            // 创建要显示的图标

            // 创建一个Alert屏幕对象，要显示的图标为 img
            Alert info = new Alert("This is a Alert Example");
            info.setType(AlertType.INFO);

            // 设置显示时间
            // info.setTimeout(Alert.FOREVER);
            info.setTimeout(3000);
            // 显示Alert屏幕
            display.setCurrent(info);
        }
        if (m_cmdBack == c)
        {
            display.setCurrent(list);
        }

    }

}