gamemenulist.java

一个基于JAVA的手机射击类游戏``有过关模式

package jsky;

import javax.microedition.lcdui.*;

public class GameMenuList extends List implements CommandListener {
    private Dragon dragonMidlet;
    private boolean gameActive = false;
    
    GameMenuList(Dragon dragonMidlet) {
        super("GAME MENU", List.IMPLICIT);
        
        this.dragonMidlet = dragonMidlet;
        append("    NEW GAME   ", null);
        //append(" SCORES RECORD ", null);
        append(" GAME ASSISTANT", null);
        append("     ABOUT     ", null);
        append("     EXIT      ", null);
        
        setCommandListener(this);
    }
    
   /* void setGameActive(boolean active)
    {
        if (active && !gameActive)
        {
            gameActive = true;
            insert(0, "继续游戏", null);
        }
        else if (!active && gameActive)
        {
            gameActive = false;
            delete(0);
        }
    }*/
    
    public void commandAction(Command cmd, Displayable dis) {
        //这里用到List.SELECT_COMMAND对象和getSelectedIndex()
        //与getKeyStates()的用法相似;
        if (cmd == List.SELECT_COMMAND) {
            int index = getSelectedIndex();
            if (index != -1) // should never be -1
            {
                if (!gameActive) {
                    index++;
                }
                switch (index) {
                    case 0: //还没有确定
                        //
                        //dragonMidlet.resume();
                        break;
                    case 1: // 开始新游戏
                        dragonMidlet.menuListGameStart();
                        break;
                        //case 2: //查看纪录
                        //
                        //break;
                    case 2: //用户手册
                        //Dragon.MISSIONCOUNTS=  Dragon.GAMEASSISTANT;
                        dragonMidlet.showGameAssistant();
                        break;
                    case 3: //关于
                        Dragon.MISSIONCOUNTS = Dragon.ABOUTCANVAS;
                        dragonMidlet.showAboutCanvas();
                        
                        break;
                    case 4: //退出
                        dragonMidlet.quitApp();
                        break;
                    default:
                        break;
                }
            }
        }
        
    }
    
}