我的第一个J2ME 程序

package com;

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.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

/** *//*******************************************************************************
 * 
 * @author zdw
 * 
 */
public class TextTest extends MIDlet implements CommandListener
{
    // 文本框
    private TextBox tbx = null;
    // 控制输入输出的类
    private Display display = Display.getDisplay(this);
    // 命令菜单(清除)
    private Command clear;
    // 得到鼠标位置
    private Command getCursorPos;
    // 输入限制
    private Command astrict;
    // 发送
    private Command send;
    // 退出
    private Command exit;

    public TextTest()
    {
        // 初始化textBox
        tbx = new TextBox("测试标题", "测试内容", 200, TextField.ANY);
        // 设置为当前显示
        display.setCurrent(tbx);
        // 清除菜单
        clear = new Command("清空", Command.SCREEN, 1);
        // 光标位置菜单
        getCursorPos = new Command("光标位置", Command.SCREEN, 1);
        // 输入限制菜单
        astrict = new Command("只能输入数字", Command.SCREEN, 1);
        // 发送菜单
        send = new Command("发送", Command.SCREEN, 1);
        // 退出菜单
        exit = new Command("退出", Command.EXIT, 1);

        tbx.addCommand(clear);
        tbx.addCommand(getCursorPos);
        tbx.addCommand(astrict);
        tbx.addCommand(send);
        tbx.addCommand(exit);
        // 添加Ticker(显示在TextBox上方)
        tbx.setTicker(new Ticker("短信编辑器"));
        // 添加事件监听器
        tbx.setCommandListener(this);
    }

    // Alert的初始函数
    public void initAlert()
    {
        Alert alert = new Alert("提示", "发送成功", null, AlertType.INFO);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert);
    }

    // 事件处理
    public void commandAction(Command cmd, Displayable dis)
    {
        if (cmd == getCursorPos)
        {
            System.out.println("光标位置为:" + tbx.getCaretPosition());
        }
        if (cmd == clear)
        {
            tbx.setString("");
        }
        if (cmd.getLabel().equals("只能输入数字"))
        {
            tbx.setConstraints(TextField.DECIMAL);
            tbx.removeCommand(astrict);
            astrict = new Command("取消限制", Command.SCREEN, 1);
            tbx.addCommand(astrict);
        }
        if (cmd.getLabel().equals("取消限制"))
        {
            tbx.setConstraints(TextField.ANY);
            tbx.removeCommand(astrict);
            astrict = new Command("只能输入数字", Command.SCREEN, 1);
            tbx.addCommand(astrict);
        }
        if (cmd.getCommandType() == Command.EXIT)
        {
            this.notifyDestroyed();
        }
        if (cmd == send)
        {
            this.initAlert();
        }
    }

    protected void destroyApp(boolean arg0) throws MIDletStateChangeException
    {

    }

    protected void pauseApp()
    {

    }

    protected void startApp() throws MIDletStateChangeException
    {

    }

}

々上善若水々 2008-06-23 12:55 发表评论