j2me 菜单设计方案1

2008-02-23 09:23:10来源：互联网阅读 ()

//文件名 SimpleCustomMenu.Java

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

public class SimpleCustomMenu extends MIDlet implements CommandListener {

Display display;
Display pauseDisplay;
boolean isSplash = true;
MenuScreen menuScreen;

public SimpleCustomMenu() {
MenuScreen menuScreen = new MenuScreen();
display = Display.getDisplay(this);
display.setCurrent(menuScreen);
}

protected void startApp() throws MIDletStateChangeException {
}

protected void pauseApp() { }
protected void destroyApp (boolean flag) throws MIDletStateChangeException {}

public void commandAction (Command cmd, Displayable dis) {

}
}

////////////////////////////////////////////////////

//文件名 MenuScreen.java

import javax.microedition.lcdui.*;

public class MenuScreen extends Canvas implements Runnable {

static final Font lowFont = Font.getFont (Font.FACE_MONOSPACE, Font.STYLE_PLAIN, Font.SIZE_SMALL);
static final Font highFont = Font.getFont (Font.FACE_MONOSPACE, Font.STYLE_BOLD, Font.SIZE_MEDIUM);

static final int lowColor = 0x000000FF;
static final int highColor = 0x00FF0000;
static final int highBGColor = 0x00CCCCCC;

static int width;
static int height;

static int startHeight;

static final int spacing = highFont.getHeight()/2;

static final int NEW_GAME = 0;
static final int HIGH_SCORE = 1;
static final int SETTINGS = 2;
static final int HELP = 3;
static final int ABOUT = 4;
static final int MENU_ITEM_COUNT = 5;
static String[] mainMenu = new String[MENU_ITEM_COUNT];

static int menuIdx;

Thread menuThread;

public MenuScreen() {
width = getWidth();
height = getHeight();

mainMenu[0] = "开始新游戏";
mainMenu[1] = "显示得分";
mainMenu[2] = "设置";
mainMenu[3] = "帮助";
mainMenu[4] = "关于";

startHeight = (highFont.getHeight() * mainMenu.length) ((mainMenu.length-1) * spacing);
startHeight = (height - startHeight) / 2;

menuIdx = 0;

menuThread = new Thread(this);
menuThread.start();
}

public void run() {
while(true) {
repaint();
}
}

public void paint(Graphics g) {

g.setColor(0x00FFFFFF);
g.fillRect(0,0,width,height);

for (int i=0; i<mainMenu.length; i ) {

if (i==menuIdx) {
g.setColor(highBGColor);
g.fillRect(0,startHeight (i*highFont.getHeight()) spacing,width,highFont.getHeight());
g.setFont(highFont);
g.setColor(highColor);
g.drawString(mainMenu[i],(width - highFont.stringWidth(mainMenu[i]) ) / 2,startHeight (i*highFont.getHeight()) spacing,20);
} else {
g.setFont(lowFont);
g.setColor(lowColor);
g.drawString(mainMenu[i],(width - lowFont.stringWidth(mainMenu[i]) ) / 2,startHeight (i*highFont.getHeight()) spacing,20);
}
}
}

protected void keyPressed (int code) {
if (getGameAction(code) == Canvas.UP && menuIdx - 1 >= 0) {
menuIdx--;
} else if (getGameAction(code) == Canvas.DOWN && menuIdx 1 < mainMenu.length) {
menuIdx ;
} else if (getGameAction(code) == Canvas.FIRE) {

switch(menuIdx) {
case NEW_GAME: System.out.println("开始新游戏"); break;
case HIGH_SCORE: System.out.println("显示得分"); break;
case SETTINGS: System.out.println("设置"); break;
case HELP: System.out.println("帮助"); break;
case ABOUT: System.out.println("关于"); break;
}
}
}
}