6.1.2 游戏按键事件

/×
判断游戏按键句柄
×/
import javax.microedition.midlet.×;
import javax.microedition.lcdui.×;
public class keyAction2 extends MIDlet implements CommandListener
{
Display display;
　 //声明一个Form窗口
Form  form;
Command okCommand;
Command exitCommand;
　 //声明一个游戏画板
canvasKey canvaskey;
public keyAction2( )
{
canvaskey=new canvasKey( );
display=Display.getDisplay(this);
//创建一个Form窗口
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);
　//新建Form的item项说明
form.append("测试游戏按键控制"); 
　// Form中增加一个确认命令键
form.addCommand(okCommand);
// Form中增加一个离开命令键
form.addCommand(exitCommand);
//将命令加入Form清单中
form.setCommandListener(this); 
}

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

   public void pauseApp(){}

   public void destroyApp(boolean unconditional){}

   public void commandAction(Command cmd, Displayable disp)
{
　//判断命令控制状态
if (cmd == okCommand)
{
//点确定键后运行Canvas界面
display.setCurrent(canvaskey);
}
else if(cmd == exitCommand){
//运行离开命令
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){}
}

//运行按键状态
public void keyPressed(int keyCode) 
{
//取得游戏按键名称
keyname=getKeyName(keyCode);
//取得游戏按键编码
gameaction=getGameAction(keyCode);
//重新绘制图面
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);
}
}
}