J2ME RPG游戏边学边做 – 手机游戏开发站

J2ME RPG游戏边学边做（一）

笔者以前是做j2ee的，一个月前由于兴趣所致开始利用业余时间学习j2me游戏开发。在网上看了一通教程后，便准备动手一边学一边做一个简单的rpg游戏。虽然起点比较高，但感觉游戏难度越大，遇到的问题也就越多。这样待全部解决后，也就学的差不多了。另外只有做这种游戏才有学下去的兴趣。以后我会每次把写成的源码及思路发上来，供大家指正。希望各位高人可以无私的帮助我。

下面是游戏中所需要的部分图片，还有的图片下次写到了再上传：

hero_left.png:

hero_right.png:

hero_up.png:

hero_down.png:

整个程序的主体在BraveCanvas类中完成，该类继承于GameCanvas实现Runnable接口，由BraveMIDlet类启动他， BraveMIDlet继承MIDlet实现CommandListener接口。BraveMIDlet类代码如下：（由于只是一个简单的rpg，开头画面和菜单全部省略了，改为由一个按扭启动游戏）

BraveMIDlet.java

package brave;

import
javax.microedition.lcdui.*;

import
javax.microedition.midlet.*;

public class BraveMIDlet extends
MIDlet implements CommandListener

{

private Display d ;

private Command exitCommand ;

private Command startCommand ;

private BraveCanvas braveCanvas;

public BraveMIDlet()

{

d = Display.getDisplay(this);

exitCommand = new Command("退出",Command.EXIT,1);

startCommand = new Command("开始",Command.SCREEN,1);

}

public void startApp()

{

//创建BraveCanvas

braveCanvas = new BraveCanvas();

braveCanvas.addCommand(exitCommand);

braveCanvas.addCommand(startCommand);

braveCanvas.setCommandListener(this);

//装载BraveCanvas

d.setCurrent(braveCanvas);

}

public void pauseApp()

{

}

public void destroyApp(boolean unconditional)

{

}

public void commandAction(Command c ,
Displayable dpa)

{

String str_co = c.getLabel();

if(str_co.equals("开始"))

{

//运行BraveCanvas中的线程（启动游戏）

braveCanvas.startup();

}

else if(str_co.equals("退出"))

{

destroyApp(false);

notifyDestroyed();

}

BraveCanvas.java

package brave;

import
javax.microedition.lcdui.game.GameCanvas;

import
javax.microedition.lcdui.Graphics;

import java.io.IOException;

public class BraveCanvas extends
GameCanvas implements Runnable

{

private boolean sign;

private Graphics g;

//设置@符号的当前位置

private int x,y;

public BraveCanvas()

{

super(true);

//初始化@位置

x = getWidth()/2;

y =
getHeight()/2;

}

public void startup()

{

this.sign = true;

Thread thread = new Thread(this);

//启动线程

thread.start();

}

public void run()

{

g = getGraphics();

while(sign)

{

try

{

//@符号的移动

input(g);

//@符号的显示

paint(g);

//这里应该有详细的计算，方便为上，置为15

Thread.sleep(15);

}

catch(Exception e)

{

System.out.println("2:"+e);

}

public void input(Graphics g) throws
IOException

{

int keystates = getKeyStates();

switch(keystates)

{

case UP_PRESSED:

y = Math.max(0, y – 1);

break;

case DOWN_PRESSED:

y = Math.min(getHeight(), y + 1);

break;

case LEFT_PRESSED:

x = Math.max(0, x – 1);

break;

case RIGHT_PRESSED:

x = Math.min(getWidth(), x + 1);

break;

}

public void paint(Graphics g)

{

//设置画布的背景色

g.setColor(0x000000);

//把背景色画满画布

g.fillRect(0, 0, getWidth(), getHeight());

//设置画布的前景色

g.setColor(0xffffff);

//在画布上写上@

g.drawString("@", x, y, Graphics.TOP|Graphics.LEFT);

//刷新画布

flushGraphics();

}

上面代码运行后，画面上会出现一个"@"字符随着键盘的左右而移动。虽然这离rpg游戏相差很远，但这是一个游戏的基本框架。下面我们要做的就是把"@"换成我们的英雄。为了程序清晰，我们还要设计一个英雄类Hero，该类继承于Sprite，这个类里面要用到上面的图片。

Hero.java

package brave;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.lcdui.Image;
import java.io.IOException;
public class Hero extends Sprite
{
//设置英雄的当前位置
private int x, y;
private BraveCanvas braveCanvas;
public Hero(Image image, int frameWidth, int frameHeight)
{
//英雄的初始化
super(image, frameWidth, frameHeight);
}
public void setBraveCanvas(BraveCanvas braveCanvas)
{
this.braveCanvas = braveCanvas;
}
public void init(int x, int y)
{
//英雄位置的初始化
this.x = x;
this.y = y;
}
public void afresh()
{
//刷新英雄的位置
setPosition(this.x, this.y);
}
public void moveUp() throws IOException
{
//英雄上移，并改为相应的图片
setImage(Image.createImage("/hero_up.png"), 17, 26);
nextFrame();
this.y = Math.max(0, y – 1);
}
public void moveDown() throws IOException
{
//英雄下移，并改为相应的图片
setImage(Image.createImage("/hero_down.png"), 17, 26);
nextFrame();
this.y = Math.min(braveCanvas.getHeight(), y + 1);
}
public void moveLeft() throws IOException
{
//英雄左移，并改为相应的图片
setImage(Image.createImage("/hero_left.png"), 17, 26);
nextFrame();
this.x = Math.max(0, x – 1);
}
public void moveRight() throws IOException
{
//英雄右移，并改为相应的图片
setImage(Image.createImage("/hero_right.png"), 17, 26);
nextFrame();
this.x = Math.min(braveCanvas.getWidth(), x + 1);
}
}
然后把BraveCanvas类稍做修改，把"@"换成英雄
BraveCanvas.java
package brave;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.Graphics;
import java.io.IOException;
import javax.microedition.lcdui.Image;
public class BraveCanvas extends GameCanvas implements Runnable
{
private boolean sign;
private Graphics g;
private Hero hero;
public BraveCanvas()
{
super(true);
}

public void startup()
{
this.sign = true;
try
{
   Image heroimage = Image.createImage("/hero_up.png");
   hero = new Hero(heroimage, 17, 26);
   hero.setBraveCanvas(this);
   hero.init(40,40);
}
catch(Exception e)
{
   e.printStackTrace();
}
Thread thread = new Thread(this);
thread.start();
}
public void run()
{
g = getGraphics();
while(sign)
{
   try
   {
    input(g);
    paint(g);
    Thread.sleep(15);
   }
   catch(Exception e)
   {
    System.out.println("2:"+e);
   }
}
}
public void input(Graphics g) throws IOException
{
int keystates = getKeyStates();
switch(keystates)
{
   case UP_PRESSED:
    hero.moveUp();
    break;
   case DOWN_PRESSED:
    hero.moveDown();
    break;
   case LEFT_PRESSED:
    hero.moveLeft();
    break;
   case RIGHT_PRESSED:
    hero.moveRight();
    break;
}
hero.afresh();
}
public void paint(Graphics g)
{
g.setColor(0x000000);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(0xffffff);
hero.paint(g);
flushGraphics();
}
}

这样，我们的英雄就可以在画面上移动了，不过英雄比较简单，没有hp,mp等等，只是一个图片。而且如果大家感觉英雄的脚步过快，可以在BraveCanvas类中的Hero初始化时设置：
hero.setFrameSequence(new int[]{0, 0, 1, 1, 0, 0, 2, 2 });

J2ME RPG游戏边学边做（二）
１、
public void moveDown() throws IOException
{
  //英雄下移，并改为相应的图片
  setImage(Image.createImage("/hero_down.png"), 17, 26);
  nextFrame();
  this.y = Math.min(braveCanvas.getHeight(), y + 1);
}

在io包中的读取是非常耗内存的，所以Image.createImage("/hero_down.png")放在线程的循环中确实不好，现在已经改成图象在BraveCanvas类中创建(下面的代码已更改)，然后由moveDown(Image image)方法接收传递进来的图象。

２、RPG是个大工程，一个人的力量是很难完成的，我只想实现基本的RPG功能，比如人物的对话，场景的转换，战斗等等，希望大家多多给予帮助。

这一篇我将给游戏加入地图，以下是该篇所需要的图片：

background.png

foreground.png

一个RPG中的游戏地图是非常大而且多的，为了方便以后的维护，我创建了一个Scene类，该类主要是产生游戏所需要的地图。

Scene.java

package brave;
import javax.microedition.lcdui.game.TiledLayer;
import javax.microedition.lcdui.Image;
public class Scene
{
public static TiledLayer createTiledLayerByBackground(Image image)
{
//使用TiledLayer创建地图
TiledLayer tiledLayer = new TiledLayer(10, 8, image, 48, 64);
tiledLayer.fillCells(0, 0, 10, 8, 2);
return tiledLayer;
}
}

修改BraveCanvas类，加入地图
BraveCanvas.java
package brave;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.Graphics;
import java.io.IOException;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.TiledLayer;

public class BraveCanvas extends GameCanvas implements Runnable
{
private boolean sign;
private Graphics g;
private Hero hero;
private Image upimage;
private Image downimage;
private Image leftimage;
private Image rightimage;
private TiledLayer backgroundMap;
public BraveCanvas()
{
super(true);
}
public void startup()
{
this.sign = true;
try
{
   //产生地图
   backgroundMap = Scene.createTiledLayerByBackground(
    Image.createImage("/background.png"));

   //改正上一篇的错误
   upimage = Image.createImage("/hero_up.png");
   downimage = Image.createImage("/hero_down.png");
   leftimage = Image.createImage("/hero_left.png");
   rightimage = Image.createImage("/hero_right.png");
   hero = new Hero(upimage, 17, 26);
   hero.setFrameSequence(new int[]{1, 1, 0, 0, 1, 1, 2, 2});
   hero.setBraveCanvas(this);
   hero.init(40,40);
}
catch(Exception e)
{
   e.printStackTrace();
}
Thread thread = new Thread(this);
thread.start();
}
public void run()
{
g = getGraphics();
while(sign)
{
   try
   {
    input(g);
    paint(g);
    Thread.sleep(15);
   }
   catch(Exception e)
   {
    e.printStackTrace();
   }
}
}
public void input(Graphics g) throws IOException
{
int keystates = getKeyStates();
switch(keystates)
{
   case UP_PRESSED:
    //由这里传入需要改变的图片
    hero.moveUp(upimage);
    break;
   case DOWN_PRESSED:
    hero.moveDown(downimage);
    break;
   case LEFT_PRESSED:
    hero.moveLeft(leftimage);
    break;
   case RIGHT_PRESSED:
    hero.moveRight(rightimage);
    break;
}
hero.afresh();
}
public void paint(Graphics g)
{
g.setColor(0x000000);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(0xffffff);
//显示地图
backgroundMap.paint(g);
hero.paint(g);
flushGraphics();
}
}

现在我们的英雄虽然能在草地上行走了，但感觉给他移动的空间太小了。而且我们在创建背景地图的时候，地图大小明明是512*480的。好，接下来我们要做的就是让英雄可以在更大的天地中活动。这里就需要一个BraveManager类来管理这些屏幕上的Sprite和TiledLayer，该类继承 LayerManager。

BraveManager.java

package brave;

import
javax.microedition.lcdui.game.LayerManager;

public class BraveManager extends
LayerManager

{

private BraveCanvas braveCanvas;

public void setBraveCanvas(BraveCanvas
braveCanvas)

{

this.braveCanvas = braveCanvas;

}

public void afresh()

{

//确定当前试图的坐标

//这里用一个比较简单的算法来使英雄永远在屏幕的中央

int viewX = Math.max(0, getLayerAt(0).getX() –
braveCanvas.getWidth()/2);

int viewY = Math.max(0, getLayerAt(0).getY() –
braveCanvas.getHeight()/2);

viewX = Math.min(viewX, getLayerAt(1).getWidth() –
braveCanvas.getWidth());

viewY = Math.min(viewY, getLayerAt(1).getHeight() –
braveCanvas.getHeight());

setViewWindow(viewX, viewY, braveCanvas.getWidth(),
braveCanvas.getHeight());

}

修改BraveCanvas类

BraveCanvas.java

package brave;

import
javax.microedition.lcdui.game.GameCanvas;

import
javax.microedition.lcdui.Graphics;

import java.io.IOException;

import
javax.microedition.lcdui.Image;

import
javax.microedition.lcdui.game.TiledLayer;

public class BraveCanvas extends
GameCanvas implements Runnable

{

private boolean sign;

private Graphics g;

private Hero hero;

private Image upimage;

private Image downimage;

private Image leftimage;

private Image rightimage;

private TiledLayer backgroundMap;

//创建Layer管理视图类

private BraveManager braveManager;

public BraveCanvas()

{

super(true);

}

public void startup()

{

this.sign = true;

try

{

backgroundMap = Scene.createTiledLayerByBackground(

Image.createImage("/background.png"));

upimage = Image.createImage("/hero_up.png");

downimage = Image.createImage("/hero_down.png");

leftimage = Image.createImage("/hero_left.png");

rightimage = Image.createImage("/hero_right.png");

//创建Layer管理视图类

braveManager = new BraveManager();

braveManager.setBraveCanvas(this);

hero = new Hero(upimage, 17, 26);

hero.setFrameSequence(new int[]{1, 1, 0, 0, 1, 1, 2, 2});

hero.setBraveCanvas(this);

hero.setBraveManager(braveManager);

hero.init(0,0);

}

catch(Exception e)

{

e.printStackTrace();

}

Thread thread = new Thread(this);

thread.start();

}

public void run()

{

g = getGraphics();

//插入图层

braveManager.insert(hero, 0);

braveManager.insert(backgroundMap, 1);

while(sign)

{

try

{

input(g);

paint(g);

Thread.sleep(15);

}

catch(Exception e)

{

e.printStackTrace();

}

public void input(Graphics g) throws
IOException

{

int keystates = getKeyStates();

switch(keystates)

{

case UP_PRESSED:

hero.moveUp(upimage);

break;

case DOWN_PRESSED:

hero.moveDown(downimage);

break;

case LEFT_PRESSED:

hero.moveLeft(leftimage);

break;

case RIGHT_PRESSED:

hero.moveRight(rightimage);

break;

}

hero.afresh();

//刷新视图的位置

braveManager.afresh();

}

public void paint(Graphics g)

{

g.setColor(0x000000);

g.fillRect(0, 0, getWidth(), getHeight());

g.setColor(0xffffff);

//显示视图

braveManager.paint(g, 0, 0);

flushGraphics();

}

这样英雄就可以在地图上任何地方行动了，不过还得改一个小地方：不知道大家还记的不，在Hero类中，我们定义英雄移动的范围最大为屏幕的尺寸。
这显然是不行的，最大的移动范围应改成地图的大小：

this.y = Math.min(braveManager.getLayerAt(1).getHeight(), y + 1);

this.x = Math.min(braveManager.getLayerAt(1).getWidth(), x + 1);

代码如下:

Hero.java

package brave;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.lcdui.Image;
import java.io.IOException;
import javax.microedition.lcdui.Graphics;
public class Hero extends Sprite
{
private int x;
private int y;
private BraveCanvas braveCanvas;
private BraveManager braveManager;
public Hero(Image image, int frameWidth, int frameHeight)
{
super(image, frameWidth, frameHeight);
}
public void setBraveCanvas(BraveCanvas braveCanvas)
{
this.braveCanvas = braveCanvas;
}
public void setBraveManager(BraveManager braveManager)
{
this.braveManager = braveManager;
}
public void setManager(BraveCanvas braveCanvas)
{
this.braveCanvas = braveCanvas;
}
public void init(int x, int y)
{
this.x = x;
this.y = y;
}
public void afresh()
{
setPosition(this.x, this.y);
}
public void moveUp(Image image) throws IOException
{
setImage(image, 17, 26);
nextFrame();
this.y = Math.max(0, y – 1);
}
public void moveDown(Image image) throws IOException
{
setImage(image, 17, 26);
nextFrame();
this.y = Math.min(braveManager.getLayerAt(1).getHeight(), y + 1);
}
public void moveLeft(Image image) throws IOException
{
setImage(image, 17, 26);
nextFrame();
this.x = Math.max(0, x – 1);
}
public void moveRight(Image image) throws IOException
{
setImage(image, 17, 26);
nextFrame();
this.x = Math.min(braveManager.getLayerAt(1).getWidth(), x + 1);
}
}

现在英雄的移动范围大了，但只英雄一人，也太孤单了，我们给他创造一个小镇吧。

修改Scene类如下：
Scene.java
package brave;
import javax.microedition.lcdui.game.TiledLayer;
import javax.microedition.lcdui.Image;
public class Scene
{
public static TiledLayer createTiledLayerByBackground(Image image)
{
TiledLayer tiledLayer = new TiledLayer(10, 8, image, 48, 64);
tiledLayer.fillCells(0, 0, 10, 8, 2);
return tiledLayer;
}
public static TiledLayer createTiledLayerByForeground(Image image)
{
TiledLayer tiledLayer = new TiledLayer(30, 32, image, 16, 16);
// 30 * 32
int[] maplist =
{
    //0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
26 27 28 29
   0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
,0 ,0 ,0 ,0 ,0 ,//0
   0
,28,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,
30,0 ,//1
   0 ,34,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
,0 ,0 ,0 ,36,0 ,//2
   0 ,34,0 ,1 ,2 ,3 ,4 ,5 ,0 ,0 ,0 ,1 ,2 ,3 ,3 ,26,3 ,3 ,4 ,5 ,0 ,0 ,1 ,2 ,3
,4 ,5 ,0 ,36,0 ,//3
   0 ,34,0 ,7 ,8 ,46,10,11,0 ,0 ,0 ,7 ,8 ,47,31,32,33,47,10,11,0 ,0 ,7 ,8
,46,10,11,0 ,36,0 ,//4
   0 ,34,0 ,13,14,15,16,17,0 ,0 ,0 ,13,14,14,37,38,39,14,16,17,0 ,0
,13,14,15,16,17,0 ,36,0 ,//5
   0 ,34,0 ,19,20,21,22,23,6 ,0 ,0 ,19,20,20,43,44,45,20,20,23,0 ,0
,19,20,21,22,23,0 ,36,0 ,//6
   0 ,34,0 ,0 ,0 ,12,0 ,0 ,0 ,0 ,0 ,24,24,24,13,15,17,24,24,24,0 ,0 ,0 ,0
,12,0 ,0 ,0 ,36,0 ,//7
   0 ,34,0 ,0 ,0 ,12,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,19,21,23,0 ,0 ,0 ,0 ,0 ,0 ,0
,12,0 ,0 ,0 ,36,0 ,//8
   0 ,34,0 ,0 ,0 ,12,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
,12,0 ,0 ,0 ,36,0 ,//9
   0 ,34,0 ,0 ,0
,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,0 ,0 ,0 ,36,0 ,//10
   0 ,34,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0 ,0 ,0 ,0
,0 ,0 ,0 ,36,0 ,//11
   0 ,34,0 ,1 ,2 ,3 ,4 ,5 ,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0 ,1 ,2 ,3
,4 ,5 ,0 ,36,0 ,//12
   0 ,34,0 ,7 ,8 ,46,10,11,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0 ,7 ,8
,46,10,11,0 ,36,0 ,//13
   0 ,34,0 ,13,14,15,16,17,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0
,13,14,15,16,17,0 ,36,0 ,//14
   0 ,34,0 ,19,20,21,22,23,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0
,19,20,21,22,23,0 ,36,0 ,//15
   0 ,34,0 ,0 ,0 ,12,0 ,0 ,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0 ,0 ,0
,12,0 ,0 ,0 ,36,0 ,//16
   0 ,34,0 ,0 ,0 ,12,0 ,0 ,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0 ,0 ,0
,12,0 ,0 ,0 ,36,0 ,//17
   0 ,34,0 ,0 ,0 ,12,0 ,0 ,0 ,12,25,25,25,25,25,25,25,25,25,25,12,0 ,0 ,0
,12,0 ,0 ,0 ,36,0 ,//18
   0 ,34,0 ,0 ,0
,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,0 ,0 ,0 ,36,0 ,//19
   0 ,34,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,0 ,0 ,0 ,0
,0 ,0 ,0 ,36,0 ,//20
   0 ,34,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,0 ,0 ,0 ,0
,0 ,0 ,0 ,36,0 ,//21
   0 ,34,0 ,1 ,2 ,3 ,4 ,5 ,0 ,12,0 ,0 ,0 ,0 ,1 ,3 ,5 ,0 ,0 ,0 ,12,0 ,1 ,2 ,3
,4 ,5 ,0 ,36,0 ,//22
   0 ,34,0 ,7 ,8 ,46,10,11,0 ,12,0 ,0 ,0 ,0 ,7 ,48,11,0 ,0 ,0 ,12,0 ,7 ,8
,46,10,11,0 ,36,0 ,//23
   0 ,34,0 ,13,14,15,16,17,0 ,12,0 ,0 ,0 ,6 ,13,15,17,0 ,0 ,0 ,12,0
,13,14,15,16,17,0 ,36,0 ,//24
   0 ,34,0 ,19,20,21,22,23,0 ,12,0 ,0 ,0 ,6 ,19,21,23,0 ,0 ,0 ,12,0
,19,20,21,22,23,0 ,36,0 ,//25
   0 ,34,0 ,0 ,0 ,12,0 ,0 ,0 ,12,18,0 ,0 ,0 ,0 ,12,0 ,0 ,0 ,0 ,12,0 ,0 ,0
,12,0 ,0 ,0 ,36,0 ,//26
   0 ,34,0 ,0 ,0
,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,0 ,0 ,0 ,36,0 ,//27
   0 ,34,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,12,12,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
,0 ,0 ,0 ,36,0 ,//28
   0 ,34,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,12,12,12,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
,0 ,0 ,0 ,36,0 ,//29
   0
,40,29,29,29,29,29,29,29,29,29,29,29,29,12,12,12,29,29,29,29,29,29,29,29,29,29,29,
42,0 ,
//30
   0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
,0 ,0 ,0 ,0 ,0 //31
};
for(int i = 0 ; i < maplist.length ; i++)
{
   int col = i % 30;
   int row = (i – col) / 30;
   tiledLayer.setCell(col, row, maplist[i]);
}
return tiledLayer;
}
}
修改BraveCanvas类如下：
BraveCanvas.java
package brave;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.Graphics;
import java.io.IOException;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.TiledLayer;

public class BraveCanvas extends GameCanvas implements Runnable
{
private boolean sign;
private Graphics g;
private Hero hero;
private Image upimage;
private Image downimage;
private Image leftimage;
private Image rightimage;
private TiledLayer backgroundMap;
private TiledLayer foregroundMap;
private BraveManager braveManager;
public BraveCanvas()
{
super(true);
}
public void startup()
{
this.sign = true;
try
{
   backgroundMap = Scene.createTiledLayerByBackground(
    Image.createImage("/background.png"));
   //生成小镇地图
   foregroundMap = Scene.createTiledLayerByForeground(
    Image.createImage("/foreground.png"));
   upimage = Image.createImage("/hero_up.png");
   downimage = Image.createImage("/hero_down.png");
   leftimage = Image.createImage("/hero_left.png");
   rightimage = Image.createImage("/hero_right.png");
   braveManager = new BraveManager();
   braveManager.setBraveCanvas(this);
   hero = new Hero(upimage, 17, 26);
   hero.setFrameSequence(new int[]{1, 1, 0, 0, 1, 1, 2, 2});
   hero.setBraveCanvas(this);
   hero.setBraveManager(braveManager);
   hero.init(0,0);
}
catch(Exception e)
{
   e.printStackTrace();
}
Thread thread = new Thread(this);
thread.start();
}
public void run()
{
g = getGraphics();
braveManager.insert(hero, 0);
//插入小镇地图
braveManager.insert(foregroundMap, 1);
braveManager.insert(backgroundMap, 2);
while(sign)
{
   try
   {
    input(g);
    paint(g);
    Thread.sleep(15);
   }
   catch(Exception e)
   {
    e.printStackTrace();
   }
}
}
public void input(Graphics g) throws IOException
{
int keystates = getKeyStates();
switch(keystates)
{
   case UP_PRESSED:
    hero.moveUp(upimage);
    break;
   case DOWN_PRESSED:
    hero.moveDown(downimage);
    break;
   case LEFT_PRESSED:
    hero.moveLeft(leftimage);
    break;
   case RIGHT_PRESSED:
    hero.moveRight(rightimage);
    break;
}
hero.afresh();
braveManager.afresh();
}
public void paint(Graphics g)
{
g.setColor(0x000000);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(0xffffff);
braveManager.paint(g, 0, 0);
flushGraphics();
}
}

运行结果如图：

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