使用J2ME技术开发RPG游戏之程序框架

package myrpg;

import javax.microedition.lcdui.*;
/**

* 游戏界面，包含所有游戏界面、逻辑以及事件处理

*/
public class MyRPGCanvas extends Canvas implements Runnable {
/**游戏是否处于运行状态，true代表处于运行状态*/

private boolean isRunning = true;
/**游戏是否处于暂停状态，true代表处于暂停状态*/

private boolean isPaused = false;
/**屏幕宽度*/

private int width;
/**屏幕高度*/

private int height; 
/**时间间隔*/

private final int INTERVAL_TIME = 100;
/**游戏状态，使用该变量标示游戏的界面和逻辑*/

private int status; 
//各个界面状态常量

/**Logo界面状态*/

private final int LOGO_STATUS = 0;
/**菜单界面状态*/

private final int MENU_STATUS = 1;
/**帮助界面状态*/

private final int HELP_STATUS = 2;
/**关于界面状态*/

private final int ABOUT_STATUS = 3;
//游戏中各个状态常量
/**地图1状态*/

private final int GAME_MAP1_STATUS = 4;
/**武器店1状态*/

private final int GAME_WEAPONSHOP1_STATUS = 5;
/**对话1状态*/

private final int GAME_DIALOG1_STATUS = 6; 
public MyRPGCanvas() {

//初始化

init();

//启动线程

Thread thread = new Thread(this);

thread.start();

} 
/**

* 初始化游戏

* 导入资源和初始化游戏状态

*/
private final void init() {

//获得屏幕尺寸

width = this.getWidth();

height = this.getHeight();

//初始化游戏状态,默认显示LOGO界面

status = LOGO_STATUS;

//导入图片和其他资源

} 
protected void paint(Graphics g) {

//清屏

clearScreen(g);

//绘制

switch (status) {

case LOGO_STATUS:

paintLogo(g);

break;
case MENU_STATUS:

paintMenu(g);

break;
case HELP_STATUS:

paintHelp(g);

break;
case ABOUT_STATUS:

paintAbout(g);

break;
case GAME_MAP1_STATUS:

paintGame_Map1(g);

break;
case GAME_WEAPONSHOP1_STATUS:

paintGame_WeaponShop1(g);

break;
case GAME_DIALOG1_STATUS:

paintDialog1(g);

break;

}

} 
/**

* 绘制LOGO界面

* @param g Graphics 画笔

*/
private final void paintLogo(Graphics g) {

}
/**

* 绘制菜单界面

* @param g Graphics 画笔

*/
private final void paintMenu(Graphics g) {

}
/**

* 绘制帮助界面

* @param g Graphics 画笔

*/
private final void paintHelp(Graphics g) {

}
/**

* 绘制关于界面

* @param g Graphics 画笔

*/
private final void paintAbout(Graphics g) {

}
/**

* 绘制游戏地图1界面

* @param g Graphics 画笔

*/
private final void paintGame_Map1(Graphics g) {

}
/**

* 绘制游戏武器店1界面

* @param g Graphics 画笔

*/
private final void paintGame_WeaponShop1(Graphics g) {

}
/**

* 绘制游戏对话1界面

* @param g Graphics 画笔

*/
private final void paintDialog1(Graphics g) {

}
/**

* 清屏

* @param g Graphics 画笔

*/
private final void clearScreen(Graphics g) {

g.setColor(0xffffff);

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

}
/**

* 开始和继续游戏

*/
public void startGame() {

isPaused = false;

}
/**

* 暂停游戏

*/
public void pauseGame() {

isPaused = true;

}
/**

* 释放资源

* 包括图片、声音等资源

*/
public void destroyGame() {

}
/**

* logo界面线程逻辑

*/
private final void doLogo() {

}
/**

* 帮助界面线程逻辑

*/
private final void doHelp() { 

}
/**

* 关于界面线程逻辑

*/
private final void doAbout() {

}
/**

* 菜单界面线程逻辑

*/
private final void doMenu() {

}
/**

* 游戏地图1界面线程逻辑

*/
private final void doGame_Map1() {

}
/**

* 游戏武器店1界面线程逻辑

*/
private final void doGame_WeaponShop1() {

}
/**

* 游戏对话1界面线程逻辑

*/
private final void doDialog1() {

} 
public void run() {

try {

while (isRunning) {

//精确延时

long start = System.currentTimeMillis();

//逻辑处理
if (!isPaused) {

switch (status) {

case LOGO_STATUS:

doLogo();

break;
case MENU_STATUS:

doMenu();

break;
case HELP_STATUS:

doHelp();

break;
case ABOUT_STATUS:

doAbout();

break;
case GAME_MAP1_STATUS:

doGame_Map1();

break;
case GAME_WEAPONSHOP1_STATUS:

doGame_WeaponShop1();

break;
case GAME_DIALOG1_STATUS:

doDialog1();

break;

}  }
//重绘

repaint();

serviceRepaints();

long end = System.currentTimeMillis();
//延时

if ((end - start) < INTERVAL_TIME) {

Thread.sleep(INTERVAL_TIME - (end - start));

}

}

} catch (Exception e) {}

}

}