microtankmidlet.java

基于j2me MIDP 2.0的一款坦克游戏演示源码

/* License
 * 
 * Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  
 *  * Redistribution of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 * 
 *  * Redistribution in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *  
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *  
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility. 
 */

import java.io.IOException;

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

public class MicroTankMIDlet
    extends MIDlet
    implements CommandListener {
  private MicroTankCanvas mMicroTankCanvas;
  
  public void startApp() {
    if (mMicroTankCanvas == null) {
      try {
        mMicroTankCanvas = new MicroTankCanvas();
        mMicroTankCanvas.start();
        Command exitCommand = new Command("Exit", Command.EXIT, 0);
        mMicroTankCanvas.addCommand(exitCommand);
        mMicroTankCanvas.setCommandListener(this);
      }
      catch (IOException ioe) {
        System.out.println(ioe);
      }
    }
    
    Display.getDisplay(this).setCurrent(mMicroTankCanvas);
  }
  
  public void pauseApp() {}
  
  public void destroyApp(boolean unconditional) {
    if (mMicroTankCanvas != null)
      mMicroTankCanvas.stop();
  }
  
  public void commandAction(Command c, Displayable s) {
    if (c.getCommandType() == Command.EXIT) {
      destroyApp(true);
      notifyDestroyed();
    }
  }
}