boxmidlet.java

J2ME程序设计实例教程的源码

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

/**
 * 该类是应用程序的主类，控制了应用程序的生命周期，处理命令事件。
 */
public class BoxMIDlet extends MIDlet implements CommandListener {
    private Command cmdExit = new Command("退出", Command.EXIT, 1);
    private Command cmdNext = new Command("下一关", Command.SCREEN, 2);
    private Command cmdPrev = new Command("上一关", Command.SCREEN, 2);
    private Command cmdRestart = new Command("重新开始", Command.SCREEN, 3);
    private Command cmdGo = new Command("进入", Command.SCREEN, 1);
    private BoxGame boxGame;        //游戏
    private InitCanvas initGUI;     //初始界面
    
    public BoxMIDlet() {
        boxGame = new BoxGame();
        boxGame.addCommand(cmdExit);
        boxGame.addCommand(cmdNext);
        boxGame.addCommand(cmdPrev);
        boxGame.addCommand(cmdRestart);
        boxGame.setCommandListener(this);
    }
    
    public void startApp() {
        Display display = Display.getDisplay(this);
        initGUI = new InitCanvas(this, boxGame);
        initGUI.addCommand(cmdExit);
        initGUI.addCommand(cmdGo);
        initGUI.setCommandListener(this);
        initGUI.show();
        //TestCanvas test = new TestCanvas();
        //display.setCurrent(test);
        
        //MiGongCanvas migong = new MiGongCanvas();
        //display.setCurrent(migong);
    }
    
    public void pauseApp() {
        //
    }
    
    public void destroyApp(boolean uncaditional) {
        //
    }
    
    public void commandAction(Command cmd, Displayable d) {
        if(cmd == cmdExit) {
            notifyDestroyed();
        }
        else if(cmd == cmdNext) {
            boxGame.nextLevel(1);
            boxGame.updateGUI();
        }
        else if(cmd == cmdPrev) {
            boxGame.nextLevel(-1);
            boxGame.updateGUI();
        }
        else if(cmd == cmdRestart) {
            boxGame.restart();
        }
        else if(cmd == cmdGo) {
            initGUI.dismiss();
        }
    }
}