myfly.java

来自「JAVA ME手机游戏FLY,玩家操控飞机」· Java 代码 · 共 73 行

import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
/** /?? MyFly ?/ */
public class MyFly extends MIDlet implements CommandListener {
/** /?? 定义GameMain对象 ?/ */
    private GameMain gm;
/** /?? 定义Command对象 ?/ */
    private Command exitcmd;
/** /?? 定义Command对象 ?/ */
    private Command restartcmd;
/** /?? 定义Command对象 ?/ */
    private Command startcmd;
/** /?? startApp() ?/ */
    protected final void startApp() {
        if (gm == null) {
            gm = new GameMain(Display.getDisplay(this));
/** /??GameCanvas继承Canvas类，Canvas类继承Displayable类，使用父类的父类方法 ?/ */
            startcmd = new Command("start", Command.OK, 1);
            exitcmd = new Command("exit", Command.EXIT, 1);
            gm.addCommand(startcmd);
            gm.addCommand(exitcmd);
            gm.setCommandListener(this);
        }
        gm.gameStart();
    }
/** /?? pauseApp() ?/ */
    protected void pauseApp() {
    }
/** /?? pauseApp()
?@param e ?/ */
    protected void destroyApp(final boolean e) {
    }
/** /?? commandAction
?@param c
?@param d ?/ */
    public final void commandAction(final Command c, final Displayable d) {
        String cmd = c.getLabel();
        if (cmd.equals("start")) {
            gm.removeCommand(startcmd);
            restartcmd = new Command("restart", Command.OK, 1);
            gm.addCommand(restartcmd);
            gm.start();
        }
        if (cmd.equals("restart")) {
            gm.clearJob();
            clearJob();
            if (gm == null) {
                gm = new GameMain(Display.getDisplay(this));
/** /??GameCanvas继承Canvas类，Canvas类继承Displayable类，使用父类的父类方法?/ */
                startcmd = new Command("restart", Command.OK, 1);
                exitcmd = new Command("exit", Command.EXIT, 1);
                gm.addCommand(startcmd);
                gm.addCommand(exitcmd);
                gm.setCommandListener(this);
                gm.start();
            }
        }
        if (cmd.equals("exit")) {
            gm.clearJob();
            clearJob();
            this.destroyApp(false);
            this.notifyDestroyed();
        }
    }
/** /?? pauseApp() ?/ */
    private void clearJob() {
        gm = null;
    }
}