零打碎敲学Android(二)—做个拼图游戏吧

Android千好万好，唯独模拟器不是太好，在不更换旧有硬件的前提下，使用Android模拟器通常会遭遇效率问题，况且在logcat下面调试，也始终不如开发桌面游戏时那么直观。有没有什么办法，能够解决这一问题呢？

其实很容易做到。

Android首先是一个精简的Linux平台，其次才是一个手机系统，Java在PC上可以做到的事情，Android不但可以做到，而且能以近乎一致的手段做到。事实上，如果有人故意通过封装抹杀Android与PC上Java应用差异性的话，任何Java游戏，都可以在很少更改代码（或者完全不更改代码）的情况下移植到Android之上。

比如，笔者下面提供的这个拼图游戏示例，就可以在几乎不改变程序结构（部分相关类需要替换，不过可以利用正则自动完成）的前提下，运行在Android上。

PC版源码（框架为LGame-Simple-0.2.0）：

package org.loon.game.simple.test;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.event.KeyEvent;import java.awt.event.MouseEvent;import org.loon.framework.game.simple.GameScene;import org.loon.framework.game.simple.core.Deploy;import org.loon.framework.game.simple.core.Screen;import org.loon.framework.game.simple.utils.GraphicsUtils;/** * * Copyright 2008 * * 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 * * 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 * @version 0.1 */public class ScreenTest1 extends Screen {private Image imageBack, tmp_imageBack, imageForward;private Graphics tmp_graphics;private int blocks[];private boolean isEvent;private int count, rs, cs, row, col, width, height;public ScreenTest1(String file1, String file2, int row, int col) {this.col = col;this.row = row;this.imageBack = GraphicsUtils.loadImage(file1);this.width = imageBack.getWidth(null);this.height = imageBack.getHeight(null);this.rs = width / row;this.cs = height / col;this.tmp_imageBack = GraphicsUtils.createImage(width, height + cs, true);this.tmp_graphics = tmp_imageBack.getGraphics();this.count = col * row;this.blocks = new int[count];this.imageForward = GraphicsUtils.loadImage(file2);for (int i = 0; i < count; i++) {blocks[i] = i;}rndBlocks();}/** * 复制拼图中图片块 * * @param x1 * @param y1 * @param x2 * @param y2 */private void copy(int x1, int y1, int x2, int y2) {tmp_graphics.copyArea(x1 * rs, y1 * cs, rs, cs, (x2 - x1) * rs,(y2 - y1) * cs);}/** * 随机生成拼图内容 * */private void rndBlocks() {tmp_graphics.drawImage(imageBack, 0, 0, null);for (int i = 0; i < (count * row); i++) {int x1 = (int) ((double) row * Math.random());int y1 = (int) ((double) col * Math.random());int x2 = (int) ((double) row * Math.random());int y2 = (int) ((double) col * Math.random());copy(x1, y1, 0, col);copy(x2, y2, x1, y1);copy(0, col, x2, y2);int j1 = blocks[y1 * row + x1];blocks[y1 * row + x1] = blocks[y2 * row + x2];blocks[y2 * row + x2] = j1;}}/** * 点击鼠标 */public void leftClick(MouseEvent e) {if (isEvent) {return;}int x = e.getX() / rs;int y = e.getY() / cs;copy(0, 0, 0, col);copy(x, y, 0, 0);copy(0, col, x, y);int no = blocks[0];blocks[0] = blocks[y * row + x];blocks[y * row + x] = no;int index;for (index = 0; index < count; index++) {if (blocks[index] != index) {break;}}if (index == count) {isEvent = true;}return;}public void draw(Graphics2D g) {if (!isEvent) {g.drawImage(tmp_imageBack, 0, 0, null);for (int i = 0; i < row; i++) {for (int j = 0; j < col; j++)g.drawRect(i * rs, j * cs, rs, cs);}}if (isEvent && imageForward != null) {g.drawImage(imageBack, 0, 0, null);g.drawImage(imageForward, 0, 0, null);tmp_graphics.dispose();}}public boolean isEvent() {return isEvent;}public void setEvent(boolean isEvent) {this.isEvent = isEvent;}public void middleClick(MouseEvent e) {}public void onKey(KeyEvent e) {}public void onKeyUp(KeyEvent e) {}public void rightClick(MouseEvent e) {}public static void main(String[] args) {GameScene frame = new GameScene("拼图", 320, 480);Deploy deploy = frame.getDeploy();deploy.setScreen(new ScreenTest1("images/backimage1.jpg","images/over.png", 4, 4));deploy.setShowFPS(true);deploy.setLogo(false);deploy.setFPS(100);deploy.mainLoop();frame.showFrame();}}

Android版源码（框架为LAGame-Simple-prototype）：

示例源码下载地址：http://code.google.com/p/loon-simple/downloads/list

package org.loon.framework.android.game;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 * * 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 <a title="" href="http://hi.baidu.com/ceponline" mce_href="http://hi.baidu.com/ceponline" target="_blank">ceponline</a>@yahoo.com.cn * @version 0.1.0 */public class ScreenTest1 extends LAScreen {private LAImage imageBack, tmp_imageBack, imageForward;private LAGraphics tmp_graphics;private int blocks[];private boolean isEvent;private int count, rs, cs, row, col, width, height;public ScreenTest1(String file1, String file2, int row, int col) {this.col = col;this.row = row;this.imageBack = getLAImage(file1);this.width = imageBack.getWidth();this.height = imageBack.getHeight();this.rs = width / row;this.cs = height / col;this.tmp_imageBack = new LAImage(width, height + cs);this.tmp_graphics = tmp_imageBack.getLAGraphics();this.count = col * row;this.blocks = new int[count];this.imageForward = getLAImage(file2);for (int i = 0; i < count; i++) {blocks[i] = i;}rndBlocks();}/** * 复制拼图中图片块 * * @param x1 * @param y1 * @param x2 * @param y2 */private void copy(int x1, int y1, int x2, int y2) {tmp_graphics.copyArea(x1 * rs, y1 * cs, rs, cs, (x2 - x1) * rs,(y2 - y1) * cs);}/** * 随机生成拼图内容 * */private void rndBlocks() {tmp_graphics.drawImage(imageBack, 0, 0);for (int i = 0; i < (count * row); i++) {int x1 = (int) ((double) row * Math.random());int y1 = (int) ((double) col * Math.random());int x2 = (int) ((double) row * Math.random());int y2 = (int) ((double) col * Math.random());copy(x1, y1, 0, col);copy(x2, y2, x1, y1);copy(0, col, x2, y2);int j1 = blocks[y1 * row + x1];blocks[y1 * row + x1] = blocks[y2 * row + x2];blocks[y2 * row + x2] = j1;}}/** * 点击触摸屏 */public boolean onTouchDown(MotionEvent e) {if (isEvent) {return isEvent;}int x = (int) (e.getX() / rs);int y = (int) (e.getY() / cs);copy(0, 0, 0, col);copy(x, y, 0, 0);copy(0, col, x, y);int no = blocks[0];blocks[0] = blocks[y * row + x];blocks[y * row + x] = no;int index;for (index = 0; index < count; index++) {if (blocks[index] != index) {break;}}if (index == count) {isEvent = true;}return isEvent;}/** * 绘制拼图 */public void draw(LAGraphics g) {if (!isEvent) {g.drawImage(tmp_imageBack, 0, 0);for (int i = 0; i < row; i++) {for (int j = 0; j < col; j++)g.drawRect(i * rs, j * cs, rs, cs);}}if (isEvent && imageForward != null) {g.drawImage(imageBack, 0, 0);g.drawImage(imageForward, 0, 0);tmp_graphics.dispose();}}public boolean isEvent() {return isEvent;}public void setEvent(boolean isEvent) {this.isEvent = isEvent;}public boolean onKeyDown(int keyCode, KeyEvent e) {return false;}public boolean onKeyUp(int keyCode, KeyEvent e) {return false;}public boolean onTouchMove(MotionEvent e) {return false;}public boolean onTouchUp(MotionEvent e) {return false;}}

package org.loon.framework.android.game;import android.app.Activity;import android.os.Bundle;/** * * 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 * * 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 <a title="" href="http://hi.baidu.com/ceponline" mce_href="http://hi.baidu.com/ceponline" target="_blank">ceponline</a>@yahoo.com.cn * @version 0.1.0 */public class Main extends Activity {private LAGameView view;public void onCreate(Bundle icicle) {super.onCreate(icicle);view = new LAGameView(this);view.setScreen(new ScreenTest1("backimage1.jpg","over.png", 4, 4));view.setShowFPS(true);view.mainLoop();}protected void onPause() {if (view != null) {view.setRunning(false);}super.onPause();}protected void onStop() {if (view != null) {view.setRunning(false);}super.onStop();}}

示例源码下载地址：http://code.google.com/p/loon-simple/downloads/list

Android游戏与Java桌面游戏在本质上不存在任何区别，逻辑实现更可以完全一致。通过示例我们看到，把一个以LGame-Simple框架开发的Java桌面游戏移植到Android上居然是如此简单。

事实上，未来的Android版LGame-Simple，函数实现将与PC版保持一致，对于差异性代码，笔者也将提供相互转换的辅助工具。

如果您正在以LGame-Simple开发Java游戏，那么恭喜您，至多到今年12月底，它也将可以同时运行在Android上了。

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