零打碎敲学Android(四)—跳跃的火之意志！

电玩女神 2022-08-04 01:44 182阅读 0赞

[http://blog.csdn.net/cping1982/archive/2009/10/25/4725076.aspx][http_blog.csdn.net_cping1982_archive_2009_10_25_4725076.aspx]

动作游戏（ACT），作为在N早以前的红白机时代，便已经大量普及的经典游戏类型，它强调玩家的反应能力和手眼的配合，属于快节奏游戏的典型。相对而言，动作游戏的剧情一般也比较简单，主要通过熟悉操作技巧就可以进行游戏，多以2D为主潮流。在游戏中，玩家控制的角色不仅可以走、跑、跳，甚至可以俯身、爬行、翻滚、飞行、甚至爬墙（见附图：《忍者龙剑传》）。

![android4_1.jpg][]

ACT游戏的武器也多种多样，近程、远程、定时，还可以使用大量的辅助道具，譬如：吊索（例如《蜘蛛侠》）。加之种种场景的地形效果，流沙、冰地、履带、齿轮等等，配合场景中的种种机关，如墙上的开关、灯控、钉板等等，使游戏过程千变万化。即使是3D仿真技术发达的今天，相信仍有不少玩家流连这类ACT游戏吧？

任何一款ACT游戏，从根本上说，都会设定有自己的游戏背景。策划人员在设计这部分内容时，可以充分发挥自己的想象力。游戏的背景可以为数千年前的原始神话时代的《火之鸟》、《彩虹岛》，也可以是神秘奇幻的中世纪《圆桌武士》、《恶魔城》、《波斯王子》，甚至回到雄壮激荡的中国古代，作出《天地吞食》、《杨家将》，乃至于未来时代的《魂斗罗》，或者以著名故事、漫画为原型的《蜘蛛侠》、《梦幻岛》等，乃至于从来没有过的时间、空间、物种。故事需要尽可能的离奇或是感人，这样才能有效地抓住玩家，事实证明，在这样的游戏中，完全可以在游戏过程中加入情节的，譬如《恶魔城·月夜狂想曲》就是一个非常好的例子，在ACT为主的游戏过程中，角色会遇到很多人，为他提供信息，在一定条件下给予其道具，可以中途买卖物品。相信随着游戏的发展，这类多元化游戏将会越来越受欢迎。

而在游戏设计中，操作感也非常重要，矛头直指游戏的上手性。在PC或Android上玩这类游戏，更是对操作要求极高，游戏玩家玩的是否舒服，也全在这一步。举个例子，如我们控制一个角色去跳过一个很宽的沟。步骤应该为：跑——>快跑——>跳跃。初步设定“跑”“加速”“跳跃”必须设到“S”“D”“F”三个键上，通常情况就应该依次把“S”“D”“F”三个相邻的键设为“加速”“跑” “跳跃”。这样，平时玩家在游戏过程中，可以始终按住“D”键不放，需要加速时，无名指按着“S”，过沟大跳跃时，只需要食指点下“F”键就可以了，除此之外，其它的排列都将很别扭，可自己一试。

另外从键盘和鼠标的功能来说，有的东西已经是成规范性的东西了。对应相关的游戏软件我们也可以找到规律，并力图靠近它。做为策划，永远也不要霸道的要求玩家去适应你的规律，找到大众都喜欢都适应的规律才是为策划之正道。

牵扯到ACT游戏，自然免不了会有关卡的概念，所谓关卡就是游戏过程中一个又一个的小节。在这里也是同样可以发挥策划的想象力的好地方，每一关可以设计不同的特色，我想大家一定不会忘记古旧而精典的ACT游戏《魂斗罗》吧，记得履带+下砸钉锤那一关么？记得最后一关会飞起来的毒蝎么？这就是有特色而让人难忘的精典呀。

![android4_2.jpg][]

这一部分可以说是ACT游戏的核心。

至于游戏的规则设定，比如在什么情况下，角色会死亡？在什么情况下，敌NPC会OVER？角色在什么状态下可以躲过敌人飞行道具？角色在情况下会飞行？每一种道具的作用？都是需要设计者费心的，比如有的游戏，在规则上会设计一些独创的内容，如上面提到的《天地吞食》，某角色击打时如果同时按着“下”，就会把击打对象举起来并抛出。

而说起ACT游戏的代表作，那么便首推《超级马里奥》，这款家喻户晓的动作游戏，不但在当时，甚至对后世游戏界产生了无法估量的巨大影响。

截止到2008年，马里奥游戏分别在不同的机种上发布了116种，当中包括马力奥自己为主角的游戏和其他如任天堂大乱斗等游戏上，成为了吉尼斯世界纪录大全中，发行最多款电子游戏的电子游戏角色。

那么，对于这款地球人都知道的游戏，我们可不可以将它移植到Android之上，甚至再加上少许变化，令它成为一款全新的游戏呢？答案是肯定的。

相关知识点说了很多。下面，我将分别给出PC以及Android两个版本的马里奥类游戏实现，让大家对基本业务流程有一个初步了解。

源码下载地址：[http://code.google.com/p/loon-simple/downloads/list][http_code.google.com_p_loon-simple_downloads_list]

PC版实现：

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package org.loon.game.test;    
import java.awt.Color;    
import java.awt.Graphics2D;    
import java.awt.event.KeyEvent;    
import java.awt.event.MouseEvent;    
import java.util.Iterator;    
import java.util.LinkedList;    
import org.loon.framework.game.simple.GameScene;    
import org.loon.framework.game.simple.core.Deploy;    
import org.loon.framework.game.simple.core.LTimer;    
import org.loon.framework.game.simple.core.LTimerContext;    
import org.loon.framework.game.simple.core.Screen;    
/\*\*   
 \*    
 \* Copyright 2008 - 2009   
 \*    
 \* Licensed under the Apache License, Version 2.0 (the "License"); you may not   
 \* use this file except in compliance with the License. You may obtain a copy of   
 \* the License at   
 \*    
 \* [http://www.apache.org/licenses/LICENSE-2.0][http_www.apache.org_licenses_LICENSE-2.0]   
 \*    
 \* Unless required by applicable law or agreed to in writing, software   
 \* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT   
 \* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the   
 \* License for the specific language governing permissions and limitations under   
 \* the License.   
 \*    
 \* @project loonframework   
 \* @author chenpeng   
 \* @email：[ceponline@yahoo.com.cn][ceponline_yahoo.com.cn]   
 \* @version 0.1   
 \*/   
public class Main extends Screen \{    
    public static final int WIDTH = 320;    
    public static final int HEIGHT = 480;    
    private LTimer delay;    
    private Map map;    
    private Hero hero;    
    private ActionKey goLeftKey;    
    private ActionKey goRightKey;    
    private ActionKey jumpKey;    
    private double x, y;    
    // 键盘事件记录器    
    class ActionKey \{    
        static final int PRESS\_ONLY = 1, STATE\_RELEASED = 0, STATE\_PRESSED = 1,    
                STATE\_WAITING\_FOR\_RELEASE = 2;    
        int mode, amount, state;    
        public ActionKey() \{    
            this(0);    
        \}    
        public ActionKey(int mode) \{    
            this.mode = mode;    
            reset();    
        \}    
        public void reset() \{    
            state = STATE\_RELEASED;    
            amount = 0;    
        \}    
        public void press() \{    
            if (state != STATE\_WAITING\_FOR\_RELEASE) \{    
                amount++;    
                state = STATE\_PRESSED;    
            \}    
        \}    
        public void release() \{    
            state = STATE\_RELEASED;    
        \}    
        public boolean isPressed() \{    
            if (amount != 0) \{    
                if (state == STATE\_RELEASED) \{    
                    amount = 0;    
                \} else if (mode == PRESS\_ONLY) \{    
                    state = STATE\_WAITING\_FOR\_RELEASE;    
                    amount = 0;    
                \}    
                return true;    
            \}    
            return false;    
        \}    
    \}    
    public Main() \{    
        delay = new LTimer(20);    
        goLeftKey = new ActionKey();    
        goRightKey = new ActionKey();    
        jumpKey = new ActionKey(ActionKey.PRESS\_ONLY);    
        initialize();    
    \}    
    private void initialize() \{    
        map = new Map("map.txt");    
        hero = new Hero("hero.gif", 192, 32, 40, 40, map);    
    \}    
    public void alter(LTimerContext timer) \{    
        if (delay.action(timer.getTimeSinceLastUpdate())) \{    
            if (goLeftKey.isPressed()) \{    
                // 向左移动    
                hero.left();    
            \} else if (goRightKey.isPressed()) \{    
                // 向右移动    
                hero.right();    
            \} else \{    
                // 暂停    
                hero.stop();    
            \}    
            if (jumpKey.isPressed()) \{    
                // 跳跃    
                hero.jump();    
            \}    
            // 更新角色状态    
            hero.update(timer.getTimeSinceLastUpdate());    
            // 遍历精灵集合    
            LinkedList sprites = map.getSprites();    
            for (Iterator it = sprites.iterator(); it.hasNext();) \{    
                Sprite sprite = (Sprite) it.next();    
                // 更新所有精灵状态    
                sprite.update(timer.getTimeSinceLastUpdate());    
                // 碰撞测试    
                if (hero.isCollision(sprite)) \{    
                    // 遇敌    
                    if (sprite instanceof Enemy) \{    
                        Enemy e = (Enemy) sprite;    
                        // 踩踏敌人    
                        if ((int) hero.getY() < (int) e.getY()) \{    
                            sprites.remove(e);    
                            hero.setForceJump(true);    
                            hero.jump();    
                            break;    
                        \} else \{    
                            // 重新开始    
                            initialize();    
                        \}    
                        // 食物    
                    \} else if (sprite instanceof Food) \{    
                        Food f = (Food) sprite;    
                        sprites.remove(f);    
                        break;    
                        // 加速宝物    
                    \} else if (sprite instanceof Speed) \{    
                        sprites.remove(sprite);    
                        Speed speedUp = (Speed) sprite;    
                        speedUp.use(hero);    
                        break;    
                        // 跳跃宝物    
                    \} else if (sprite instanceof Jump) \{    
                        sprites.remove(sprite);    
                        Jump jump = (Jump) sprite;    
                        jump.use(hero);    
                        break;    
                    \}    
                \}    
            \}    
        \}    
    \}    
    /\*\*   
     \* 绘制游戏界面   
     \*/   
    public void draw(Graphics2D g) \{    
        g.setColor(Color.BLACK);    
        g.fillRect(0, 0, getWidth(), getHeight());    
        int offsetX = Main.WIDTH / 2 - (int) hero.getX();    
        offsetX = Math.min(offsetX, 0);    
        offsetX = Math.max(offsetX, Main.WIDTH - map.getWidth());    
        int offsetY = Main.HEIGHT / 2 - (int) hero.getY();    
        offsetY = Math.min(offsetY, 0);    
        offsetY = Math.max(offsetY, Main.HEIGHT - map.getHeight());    
        map.draw(g, offsetX, offsetY);    
        hero.draw(g, offsetX, offsetY);    
        LinkedList sprites = map.getSprites();    
        for (Iterator it = sprites.iterator(); it.hasNext();) \{    
            Sprite sprite = (Sprite) it.next();    
            x = Map.pixelsToTiles(sprite.getX());    
            y = Map.pixelsToTiles(sprite.getY());    
            // 精灵绘制限制在可见区域内    
            if (x > map.getFirstTileX() && x < map.getLastTileX()    
                    && y > map.getFirstTileY() && y < map.getLastTileY()) \{    
                sprite.draw(g, offsetX, offsetY);    
            \}    
        \}    
    \}    
    public void leftClick(MouseEvent arg0) \{    
    \}    
    public void middleClick(MouseEvent arg0) \{    
    \}    
    public void rightClick(MouseEvent arg0) \{    
    \}    
    public void onKey(KeyEvent e) \{    
        int key = e.getKeyCode();    
        if (key == KeyEvent.VK\_LEFT) \{    
            goLeftKey.press();    
        \}    
        if (key == KeyEvent.VK\_RIGHT) \{    
            goRightKey.press();    
        \}    
        if (key == KeyEvent.VK\_UP) \{    
            jumpKey.press();    
        \}    
    \}    
    public void onKeyUp(KeyEvent e) \{    
        int key = e.getKeyCode();    
        if (key == KeyEvent.VK\_LEFT) \{    
            goLeftKey.release();    
        \}    
        if (key == KeyEvent.VK\_RIGHT) \{    
            goRightKey.release();    
        \}    
        if (key == KeyEvent.VK\_UP) \{    
            jumpKey.release();    
        \}    
    \}    
    public static void main(String\[\] args) \{    
        GameScene frame = new GameScene("火影忍者", WIDTH, HEIGHT);    
        Deploy deploy = frame.getDeploy();    
        deploy.setScreen(new Main());    
        deploy.setShowFPS(true);    
        deploy.setLogo(false);    
        deploy.setFPS(100);    
        deploy.mainLoop();    
        frame.showFrame();    
    \}    
\}   
package org.loon.game.test;  
import java.awt.Color;  
import java.awt.Graphics2D;  
import java.awt.event.KeyEvent;  
import java.awt.event.MouseEvent;  
import java.util.Iterator;  
import java.util.LinkedList;  
import org.loon.framework.game.simple.GameScene;  
import org.loon.framework.game.simple.core.Deploy;  
import org.loon.framework.game.simple.core.LTimer;  
import org.loon.framework.game.simple.core.LTimerContext;  
import org.loon.framework.game.simple.core.Screen;  
/\*\*  
 \*  
 \* Copyright 2008 - 2009  
 \*  
 \* Licensed under the Apache License, Version 2.0 (the "License"); you may not  
 \* use this file except in compliance with the License. You may obtain a copy of  
 \* the License at  
 \*  
 \* [http://www.apache.org/licenses/LICENSE-2.0][http_www.apache.org_licenses_LICENSE-2.0]  
 \*  
 \* Unless required by applicable law or agreed to in writing, software  
 \* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT  
 \* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the  
 \* License for the specific language governing permissions and limitations under  
 \* the License.  
 \*  
 \* @project loonframework  
 \* @author chenpeng  
 \* @email：[ceponline@yahoo.com.cn][ceponline_yahoo.com.cn]  
 \* @version 0.1  
 \*/  
public class Main extends Screen \{  
 public static final int WIDTH = 320;  
 public static final int HEIGHT = 480;  
 private LTimer delay;  
 private Map map;  
 private Hero hero;  
 private ActionKey goLeftKey;  
 private ActionKey goRightKey;  
 private ActionKey jumpKey;  
 private double x, y;  
 // 键盘事件记录器  
 class ActionKey \{  
  static final int PRESS\_ONLY = 1, STATE\_RELEASED = 0, STATE\_PRESSED = 1,  
    STATE\_WAITING\_FOR\_RELEASE = 2;  
  int mode, amount, state;  
  public ActionKey() \{  
   this(0);  
  \}  
  public ActionKey(int mode) \{  
   this.mode = mode;  
   reset();  
  \}  
  public void reset() \{  
   state = STATE\_RELEASED;  
   amount = 0;  
  \}  
  public void press() \{  
   if (state != STATE\_WAITING\_FOR\_RELEASE) \{  
    amount++;  
    state = STATE\_PRESSED;  
   \}  
  \}  
  public void release() \{  
   state = STATE\_RELEASED;  
  \}  
  public boolean isPressed() \{  
   if (amount != 0) \{  
    if (state == STATE\_RELEASED) \{  
     amount = 0;  
    \} else if (mode == PRESS\_ONLY) \{  
     state = STATE\_WAITING\_FOR\_RELEASE;  
     amount = 0;  
    \}  
    return true;  
   \}  
   return false;  
  \}  
 \}  
 public Main() \{  
  delay = new LTimer(20);  
  goLeftKey = new ActionKey();  
  goRightKey = new ActionKey();  
  jumpKey = new ActionKey(ActionKey.PRESS\_ONLY);  
  initialize();  
 \}  
 private void initialize() \{  
  map = new Map("map.txt");  
  hero = new Hero("hero.gif", 192, 32, 40, 40, map);  
 \}  
 public void alter(LTimerContext timer) \{  
  if (delay.action(timer.getTimeSinceLastUpdate())) \{  
   if (goLeftKey.isPressed()) \{  
    // 向左移动  
    hero.left();  
   \} else if (goRightKey.isPressed()) \{  
    // 向右移动  
    hero.right();  
   \} else \{  
    // 暂停  
    hero.stop();  
   \}  
   if (jumpKey.isPressed()) \{  
    // 跳跃  
    hero.jump();  
   \}  
   // 更新角色状态  
   hero.update(timer.getTimeSinceLastUpdate());  
   // 遍历精灵集合  
   LinkedList sprites = map.getSprites();  
   for (Iterator it = sprites.iterator(); it.hasNext();) \{  
    Sprite sprite = (Sprite) it.next();  
    // 更新所有精灵状态  
    sprite.update(timer.getTimeSinceLastUpdate());  
    // 碰撞测试  
    if (hero.isCollision(sprite)) \{  
     // 遇敌  
     if (sprite instanceof Enemy) \{  
      Enemy e = (Enemy) sprite;  
      // 踩踏敌人  
      if ((int) hero.getY() < (int) e.getY()) \{  
       sprites.remove(e);  
       hero.setForceJump(true);  
       hero.jump();  
       break;  
      \} else \{  
       // 重新开始  
       initialize();  
      \}  
      // 食物  
     \} else if (sprite instanceof Food) \{  
      Food f = (Food) sprite;  
      sprites.remove(f);  
      break;  
      // 加速宝物  
     \} else if (sprite instanceof Speed) \{  
      sprites.remove(sprite);  
      Speed speedUp = (Speed) sprite;  
      speedUp.use(hero);  
      break;  
      // 跳跃宝物  
     \} else if (sprite instanceof Jump) \{  
      sprites.remove(sprite);  
      Jump jump = (Jump) sprite;  
      jump.use(hero);  
      break;  
     \}  
    \}  
   \}  
  \}  
 \}  
 /\*\*  
  \* 绘制游戏界面  
  \*/  
 public void draw(Graphics2D g) \{  
  g.setColor(Color.BLACK);  
  g.fillRect(0, 0, getWidth(), getHeight());  
  int offsetX = Main.WIDTH / 2 - (int) hero.getX();  
  offsetX = Math.min(offsetX, 0);  
  offsetX = Math.max(offsetX, Main.WIDTH - map.getWidth());  
  int offsetY = Main.HEIGHT / 2 - (int) hero.getY();  
  offsetY = Math.min(offsetY, 0);  
  offsetY = Math.max(offsetY, Main.HEIGHT - map.getHeight());  
  map.draw(g, offsetX, offsetY);  
  hero.draw(g, offsetX, offsetY);  
  LinkedList sprites = map.getSprites();  
  for (Iterator it = sprites.iterator(); it.hasNext();) \{  
   Sprite sprite = (Sprite) it.next();  
   x = Map.pixelsToTiles(sprite.getX());  
   y = Map.pixelsToTiles(sprite.getY());  
   // 精灵绘制限制在可见区域内  
   if (x > map.getFirstTileX() && x < map.getLastTileX()  
     && y > map.getFirstTileY() && y < map.getLastTileY()) \{  
    sprite.draw(g, offsetX, offsetY);  
   \}  
  \}  
 \}  
 public void leftClick(MouseEvent arg0) \{  
 \}  
 public void middleClick(MouseEvent arg0) \{  
 \}  
 public void rightClick(MouseEvent arg0) \{  
 \}  
 public void onKey(KeyEvent e) \{  
  int key = e.getKeyCode();  
  if (key == KeyEvent.VK\_LEFT) \{  
   goLeftKey.press();  
  \}  
  if (key == KeyEvent.VK\_RIGHT) \{  
   goRightKey.press();  
  \}  
  if (key == KeyEvent.VK\_UP) \{  
   jumpKey.press();  
  \}  
 \}  
 public void onKeyUp(KeyEvent e) \{  
  int key = e.getKeyCode();  
  if (key == KeyEvent.VK\_LEFT) \{  
   goLeftKey.release();  
  \}  
  if (key == KeyEvent.VK\_RIGHT) \{  
   goRightKey.release();  
  \}  
  if (key == KeyEvent.VK\_UP) \{  
   jumpKey.release();  
  \}  
 \}  
 public static void main(String\[\] args) \{  
  GameScene frame = new GameScene("火影忍者", WIDTH, HEIGHT);  
  Deploy deploy = frame.getDeploy();  
  deploy.setScreen(new Main());  
  deploy.setShowFPS(true);  
  deploy.setLogo(false);  
  deploy.setFPS(100);  
  deploy.mainLoop();  
  frame.showFrame();  
 \}  
\}

![android4_3.jpg][]

Android版实现：

view plaincopy to clipboardprint?  
package org.loon.framework.android.game.act;    
import java.util.Iterator;    
import java.util.LinkedList;    
import org.loon.framework.android.game.LAGraphics;    
import org.loon.framework.android.game.LAScreen;    
import org.loon.framework.android.game.LTimerContext;    
import android.graphics.Color;    
import android.view.KeyEvent;    
import android.view.MotionEvent;    
/\*\*   
 \*    
 \* Copyright 2008 - 2009   
 \*   
 \* Licensed under the Apache License, Version 2.0 (the "License");   
 \* you may not use this file except in compliance with the License.   
 \* You may obtain a copy of the License at   
 \*   
 \* [http://www.apache.org/licenses/LICENSE-2.0][http_www.apache.org_licenses_LICENSE-2.0]   
 \*   
 \* Unless required by applicable law or agreed to in writing, software   
 \* distributed under the License is distributed on an "AS IS" BASIS,   
 \* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,   
 \* either express or implied. See the License for the specific language   
 \* governing permissions and limitations under the License.   
 \*   
 \* @project loonframework   
 \* @author chenpeng     
 \* @email：[ceponline@yahoo.com.cn][ceponline_yahoo.com.cn]    
 \* @version 0.1   
 \*/   
public class ScreenTest3 extends LAScreen \{    
    public static final int WIDTH = 320;    
    public static final int HEIGHT = 480;    
    // private LTimer delay;    
    private Map map;    
    private Hero hero;    
    private ActionKey goLeftKey;    
    private ActionKey goRightKey;    
    private ActionKey jumpKey;    
    private double x, y;    
    // 键盘事件记录器    
    class ActionKey \{    
        static final int PRESS\_ONLY = 1, STATE\_RELEASED = 0, STATE\_PRESSED = 1,    
                STATE\_WAITING\_FOR\_RELEASE = 2;    
        int mode, amount, state;    
        public ActionKey() \{    
            this(0);    
        \}    
        public ActionKey(int mode) \{    
            this.mode = mode;    
            reset();    
        \}    
        public void reset() \{    
            state = STATE\_RELEASED;    
            amount = 0;    
        \}    
        public void press() \{    
            if (state != STATE\_WAITING\_FOR\_RELEASE) \{    
                amount++;    
                state = STATE\_PRESSED;    
            \}    
        \}    
        public void release() \{    
            state = STATE\_RELEASED;    
        \}    
        public boolean isPressed() \{    
            if (amount != 0) \{    
                if (state == STATE\_RELEASED) \{    
                    amount = 0;    
                \} else if (mode == PRESS\_ONLY) \{    
                    state = STATE\_WAITING\_FOR\_RELEASE;    
                    amount = 0;    
                \}    
                return true;    
            \}    
            return false;    
        \}    
    \}    
    public ScreenTest3() \{    
        // delay = new LTimer(20);    
        goLeftKey = new ActionKey();    
        goRightKey = new ActionKey();    
        jumpKey = new ActionKey(ActionKey.PRESS\_ONLY);    
        initialize();    
    \}    
    private void initialize() \{    
        map = new Map("map.txt");    
        hero = new Hero("hero.gif", 192, 32, 40, 40, map);    
    \}    
    public void alter(LTimerContext timer) \{    
        // PS:虚拟机速度较慢，实机需要开放此部分，否则动作过快    
        // if (delay.action(timer.getTimeSinceLastUpdate())) \{    
        if (goLeftKey.isPressed()) \{    
            // 向左移动    
            hero.left();    
        \} else if (goRightKey.isPressed()) \{    
            // 向右移动    
            hero.right();    
        \} else \{    
            // 暂停    
            hero.stop();    
        \}    
        if (jumpKey.isPressed()) \{    
            // 跳跃    
            hero.jump();    
        \}    
        // 更新角色状态    
        hero.update(timer.getTimeSinceLastUpdate());    
        // 遍历精灵集合    
        LinkedList<Sprite> sprites = map.getSprites();    
        Iterator<Sprite> it = sprites.iterator();    
        while (it.hasNext()) \{    
            Sprite sprite = it.next();    
            // 更新所有精灵状态    
            sprite.update(timer.getTimeSinceLastUpdate());    
            // 碰撞测试    
            if (hero.isCollision(sprite)) \{    
                // 遇敌    
                if (sprite instanceof Enemy) \{    
                    Enemy e = (Enemy) sprite;    
                    // 踩踏敌人    
                    if ((int) hero.getY() < (int) e.getY()) \{    
                        sprites.remove(e);    
                        hero.setForceJump(true);    
                        hero.jump();    
                        break;    
                    \} else \{    
                        // 重新开始    
                        initialize();    
                    \}    
                    // 食物    
                \} else if (sprite instanceof Food) \{    
                    Food f = (Food) sprite;    
                    sprites.remove(f);    
                    break;    
                    // 加速宝物    
                \} else if (sprite instanceof Speed) \{    
                    sprites.remove(sprite);    
                    Speed speedUp = (Speed) sprite;    
                    speedUp.use(hero);    
                    break;    
                    // 跳跃宝物    
                \} else if (sprite instanceof Jump) \{    
                    sprites.remove(sprite);    
                    Jump jump = (Jump) sprite;    
                    jump.use(hero);    
                    break;    
                \}    
            \}    
        \}    
        // \}    
    \}    
    public void draw(LAGraphics g) \{    
        g.setColor(Color.BLACK);    
        g.fillRect(0, 0, getWidth(), getHeight());    
        int offsetX = WIDTH / 2 - (int) hero.getX();    
        offsetX = Math.min(offsetX, 0);    
        offsetX = Math.max(offsetX, WIDTH - map.getWidth());    
        int offsetY = HEIGHT / 2 - (int) hero.getY();    
        offsetY = Math.min(offsetY, 0);    
        offsetY = Math.max(offsetY, HEIGHT - map.getHeight());    
        map.draw(g, offsetX, offsetY);    
        hero.draw(g, offsetX, offsetY);    
        LinkedList<Sprite> sprites = map.getSprites();    
        for (Iterator<Sprite> it = sprites.iterator(); it.hasNext();) \{    
            Sprite sprite = it.next();    
            x = Map.pixelsToTiles(sprite.getX());    
            y = Map.pixelsToTiles(sprite.getY());    
            // 精灵绘制限制在可见区域内    
            if (x > map.getFirstTileX() && x < map.getLastTileX()    
                    && y > map.getFirstTileY() && y < map.getLastTileY())    
                sprite.draw(g, offsetX, offsetY);    
        \}    
    \}    
    public boolean onKeyDown(int keyCode, KeyEvent e) \{    
        int key = e.getKeyCode();    
        if (key == KeyEvent.KEYCODE\_DPAD\_LEFT) \{    
            goLeftKey.press();    
        \}    
        if (key == KeyEvent.KEYCODE\_DPAD\_RIGHT) \{    
            goRightKey.press();    
        \}    
        if (key == KeyEvent.KEYCODE\_DPAD\_UP) \{    
            jumpKey.press();    
        \}    
        return false;    
    \}    
    public boolean onKeyUp(int keyCode, KeyEvent e) \{    
        int key = e.getKeyCode();    
        if (key == KeyEvent.KEYCODE\_DPAD\_LEFT) \{    
            goLeftKey.release();    
        \}    
        if (key == KeyEvent.KEYCODE\_DPAD\_RIGHT) \{    
            goRightKey.release();    
        \}    
        if (key == KeyEvent.KEYCODE\_DPAD\_UP) \{    
            jumpKey.release();    
        \}    
        return false;    
    \}    
    public boolean onTouchDown(MotionEvent e) \{    
        return false;    
    \}    
    public boolean onTouchMove(MotionEvent e) \{    
        return false;    
    \}    
    public boolean onTouchUp(MotionEvent e) \{    
        return false;    
    \}    
\}   
package org.loon.framework.android.game.act;  
import java.util.Iterator;  
import java.util.LinkedList;  
import org.loon.framework.android.game.LAGraphics;  
import org.loon.framework.android.game.LAScreen;  
import org.loon.framework.android.game.LTimerContext;  
import android.graphics.Color;  
import android.view.KeyEvent;  
import android.view.MotionEvent;  
/\*\*  
 \*  
 \* Copyright 2008 - 2009  
 \*  
 \* Licensed under the Apache License, Version 2.0 (the "License");  
 \* you may not use this file except in compliance with the License.  
 \* You may obtain a copy of the License at  
 \*  
 \* [http://www.apache.org/licenses/LICENSE-2.0][http_www.apache.org_licenses_LICENSE-2.0]  
 \*  
 \* Unless required by applicable law or agreed to in writing, software  
 \* distributed under the License is distributed on an "AS IS" BASIS,  
 \* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,  
 \* either express or implied. See the License for the specific language  
 \* governing permissions and limitations under the License.  
 \*  
 \* @project loonframework  
 \* @author chenpeng   
 \* @email：[ceponline@yahoo.com.cn][ceponline_yahoo.com.cn]  
 \* @version 0.1  
 \*/  
public class ScreenTest3 extends LAScreen \{  
 public static final int WIDTH = 320;  
 public static final int HEIGHT = 480;  
 // private LTimer delay;  
 private Map map;  
 private Hero hero;  
 private ActionKey goLeftKey;  
 private ActionKey goRightKey;  
 private ActionKey jumpKey;  
 private double x, y;  
 // 键盘事件记录器  
 class ActionKey \{  
  static final int PRESS\_ONLY = 1, STATE\_RELEASED = 0, STATE\_PRESSED = 1,  
    STATE\_WAITING\_FOR\_RELEASE = 2;  
  int mode, amount, state;  
  public ActionKey() \{  
   this(0);  
  \}  
  public ActionKey(int mode) \{  
   this.mode = mode;  
   reset();  
  \}  
  public void reset() \{  
   state = STATE\_RELEASED;  
   amount = 0;  
  \}  
  public void press() \{  
   if (state != STATE\_WAITING\_FOR\_RELEASE) \{  
    amount++;  
    state = STATE\_PRESSED;  
   \}  
  \}  
  public void release() \{  
   state = STATE\_RELEASED;  
  \}  
  public boolean isPressed() \{  
   if (amount != 0) \{  
    if (state == STATE\_RELEASED) \{  
     amount = 0;  
    \} else if (mode == PRESS\_ONLY) \{  
     state = STATE\_WAITING\_FOR\_RELEASE;  
     amount = 0;  
    \}  
    return true;  
   \}  
   return false;  
  \}  
 \}  
 public ScreenTest3() \{  
  // delay = new LTimer(20);  
  goLeftKey = new ActionKey();  
  goRightKey = new ActionKey();  
  jumpKey = new ActionKey(ActionKey.PRESS\_ONLY);  
  initialize();  
 \}  
 private void initialize() \{  
  map = new Map("map.txt");  
  hero = new Hero("hero.gif", 192, 32, 40, 40, map);  
 \}  
 public void alter(LTimerContext timer) \{  
  // PS:虚拟机速度较慢，实机需要开放此部分，否则动作过快  
  // if (delay.action(timer.getTimeSinceLastUpdate())) \{  
  if (goLeftKey.isPressed()) \{  
   // 向左移动  
   hero.left();  
  \} else if (goRightKey.isPressed()) \{  
   // 向右移动  
   hero.right();  
  \} else \{  
   // 暂停  
   hero.stop();  
  \}  
  if (jumpKey.isPressed()) \{  
   // 跳跃  
   hero.jump();  
  \}  
  // 更新角色状态  
  hero.update(timer.getTimeSinceLastUpdate());  
  // 遍历精灵集合  
  LinkedList<Sprite> sprites = map.getSprites();  
  Iterator<Sprite> it = sprites.iterator();  
  while (it.hasNext()) \{  
   Sprite sprite = it.next();  
   // 更新所有精灵状态  
   sprite.update(timer.getTimeSinceLastUpdate());  
   // 碰撞测试  
   if (hero.isCollision(sprite)) \{  
    // 遇敌  
    if (sprite instanceof Enemy) \{  
     Enemy e = (Enemy) sprite;  
     // 踩踏敌人  
     if ((int) hero.getY() < (int) e.getY()) \{  
      sprites.remove(e);  
      hero.setForceJump(true);  
      hero.jump();  
      break;  
     \} else \{  
      // 重新开始  
      initialize();  
     \}  
     // 食物  
    \} else if (sprite instanceof Food) \{  
     Food f = (Food) sprite;  
     sprites.remove(f);  
     break;  
     // 加速宝物  
    \} else if (sprite instanceof Speed) \{  
     sprites.remove(sprite);  
     Speed speedUp = (Speed) sprite;  
     speedUp.use(hero);  
     break;  
     // 跳跃宝物  
    \} else if (sprite instanceof Jump) \{  
     sprites.remove(sprite);  
     Jump jump = (Jump) sprite;  
     jump.use(hero);  
     break;  
    \}  
   \}  
  \}  
  // \}  
 \}  
 public void draw(LAGraphics g) \{  
  g.setColor(Color.BLACK);  
  g.fillRect(0, 0, getWidth(), getHeight());  
  int offsetX = WIDTH / 2 - (int) hero.getX();  
  offsetX = Math.min(offsetX, 0);  
  offsetX = Math.max(offsetX, WIDTH - map.getWidth());  
  int offsetY = HEIGHT / 2 - (int) hero.getY();  
  offsetY = Math.min(offsetY, 0);  
  offsetY = Math.max(offsetY, HEIGHT - map.getHeight());  
  map.draw(g, offsetX, offsetY);  
  hero.draw(g, offsetX, offsetY);  
  LinkedList<Sprite> sprites = map.getSprites();  
  for (Iterator<Sprite> it = sprites.iterator(); it.hasNext();) \{  
   Sprite sprite = it.next();  
   x = Map.pixelsToTiles(sprite.getX());  
   y = Map.pixelsToTiles(sprite.getY());  
   // 精灵绘制限制在可见区域内  
   if (x > map.getFirstTileX() && x < map.getLastTileX()  
     && y > map.getFirstTileY() && y < map.getLastTileY())  
    sprite.draw(g, offsetX, offsetY);  
  \}  
 \}  
 public boolean onKeyDown(int keyCode, KeyEvent e) \{  
  int key = e.getKeyCode();  
  if (key == KeyEvent.KEYCODE\_DPAD\_LEFT) \{  
   goLeftKey.press();  
  \}  
  if (key == KeyEvent.KEYCODE\_DPAD\_RIGHT) \{  
   goRightKey.press();  
  \}  
  if (key == KeyEvent.KEYCODE\_DPAD\_UP) \{  
   jumpKey.press();  
  \}  
  return false;  
 \}  
 public boolean onKeyUp(int keyCode, KeyEvent e) \{  
  int key = e.getKeyCode();  
  if (key == KeyEvent.KEYCODE\_DPAD\_LEFT) \{  
   goLeftKey.release();  
  \}  
  if (key == KeyEvent.KEYCODE\_DPAD\_RIGHT) \{  
   goRightKey.release();  
  \}  
  if (key == KeyEvent.KEYCODE\_DPAD\_UP) \{  
   jumpKey.release();  
  \}  
  return false;  
 \}  
 public boolean onTouchDown(MotionEvent e) \{  
  return false;  
 \}  
 public boolean onTouchMove(MotionEvent e) \{  
  return false;  
 \}  
 public boolean onTouchUp(MotionEvent e) \{  
  return false;  
 \}  
\}

![android4_4.jpg][]

源码下载地址：[http://code.google.com/p/loon-simple/downloads/list][http_code.google.com_p_loon-simple_downloads_list]

——————————————————————————————

搞Java的同僚们，有空想着去[http://www.java.com/en/store/intl-contact.jsp][http_www.java.com_en_store_intl-contact.jsp] 申请2010年开通中国区的商店服务吧，别最后搞得和Android Market似的，只能托人“洗钱”……

本文来自CSDN博客，转载请标明出处：[http://blog.csdn.net/cping1982/archive/2009/10/25/4725076.aspx][http_blog.csdn.net_cping1982_archive_2009_10_25_4725076.aspx]

[http_blog.csdn.net_cping1982_archive_2009_10_25_4725076.aspx]: http://blog.csdn.net/cping1982/archive/2009/10/25/4725076.aspx
[android4_1.jpg]: /images/20220731/3d1c6dfcf217415a8635a9eb407c73d2.png
[android4_2.jpg]: /images/20220731/c4833333fdc54b939373afbb7e8bf5bd.png
[http_code.google.com_p_loon-simple_downloads_list]: http://code.google.com/p/loon-simple/downloads/list
[http_www.apache.org_licenses_LICENSE-2.0]: http://www.apache.org/licenses/LICENSE-2.0
[ceponline_yahoo.com.cn]: mailto:ceponline@yahoo.com.cn
[android4_3.jpg]: /images/20220731/aef9420856684f94a4578ef68c91991d.png
[android4_4.jpg]: /images/20220731/f73e90aa1b984cc48b747b4c50d75f88.png
[http_www.java.com_en_store_intl-contact.jsp]: http://www.java.com/en/store/intl-contact.jsp