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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