keyaction2.java

一本介绍手机游戏开发的书中的源代码

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

public class keyAction2 extends MIDlet implements CommandListener
{
   Display display;
   Form    form;
   Command okCommand;
   Command exitCommand;
   canvasKey canvaskey;

   public keyAction2()
   {
      canvaskey=new canvasKey();
      display=Display.getDisplay(this);
      form=new Form("Form游戏按键控制");
      okCommand = new Command("确认", Command.OK, 2);
      exitCommand = new Command("离开", Command.EXIT, 2);
      form.append("测试游戏按键控制"); 
      form.addCommand(okCommand);
      form.addCommand(exitCommand);
      form.setCommandListener(this); 
   }

   public void startApp()
   {
      display.setCurrent(form);
   }

   public void pauseApp(){}

   public void destroyApp(boolean unconditional){}

   public void commandAction(Command cmd, Displayable disp)
   {
      if (cmd == okCommand)
      {
         display.setCurrent(canvaskey);
      }
       else if(cmd == exitCommand){
         destroyApp(false);
         notifyDestroyed(); 
      } 
   }

   class canvasKey extends Canvas 
   {
      String  keyname="";
      int     gameaction=0;
      Image   handImage;
      Image   keyImage;
      String[] maxString={"UP", "SOFT1", "LEFT", "SELECT", "RIGHT", "SOFT2", "DOWN",
                          "SEND", "CLEAR", "1", "2", "3", "4", "5", "6", "7", "8", "9",
                          "ASTERISK","0","POUND"
                         };
      int[]   maxisX={85, 40, 60, 85, 110, 130, 85,
                      30, 85, 35, 85, 135, 35, 85,
                      135, 35, 85, 135, 35, 85, 135
                     };
      int[]   maxisY={48, 55, 55, 55, 55, 55, 65,
                      70, 85, 95, 105, 95, 115, 125,
                      115, 135, 145, 135, 155, 165, 155
                     };

      public canvasKey()
      {
         try{
             handImage=Image.createImage("/hand.png");
             keyImage=Image.createImage("/key.png");
         }catch(Exception ex){}
      }
      
      public void keyPressed(int keyCode) 
      {
         keyname=getKeyName(keyCode);
         gameaction=getGameAction(keyCode);
         repaint();
      }

      public void paint(Graphics g)
      {
         g.setColor(0xffffff);
         g.fillRect(0,0,getWidth(),getHeight());
         g.setColor(0);
         g.drawString("游戏按键对照表", 40, 1, Graphics.LEFT | Graphics.TOP);
         g.drawString("按键名称为:"+keyname, 50, 13, Graphics.LEFT | Graphics.TOP);
         g.drawString("游戏按键码:"+String.valueOf(gameaction), 50, 25, Graphics.LEFT | Graphics.TOP);
         g.drawImage(keyImage, 15, 40,Graphics.LEFT | Graphics.TOP);
         for(int i=0; i<maxString.length;i++)
            if(maxString[i].equals(keyname))
               g.drawImage(handImage, maxisX[i], maxisY[i], Graphics.LEFT | Graphics.TOP);
      }
   }
}