www.pudn.com > RPGDemo.rar > RPGCanvas.java
import javax.microedition.lcdui.*;
/**
* RPG游戏示例代码 实现了按键的连续移动
*/
public class RPGCanvas extends Canvas implements Runnable {
/** 游戏状态 */
private int status;
// 游戏状态设定
/** 村庄1 */
private final static int SCREEN_1 = 0;
/** 武器店 */
private final static int WEAPON_SHOP = 10;
/** 对话状态1 */
private final static int DIALOAG_1 = 100;
// 场景1地图数组
int backmap0[][] = { { 1, 11, 12, 1, 76, 1, 1, 1, 78, 1, 1, 1 },
{ 19, 20, 21, 22, 73, 80, 81, 1, 77, 68, 1, 1 },
{ 28, 29, 30, 31, 32, 1, 1, 1, 1, 1, 1, 1 },
{ 37, 38, 39, 31, 41, 1, 1, 1, 1, 1, 54, 1 },
{ 46, 47, 48, 49, 50, 1, 1, 1, 1, 1, 1, 1 },
{ 55, 74, 57, 58, 59, 1, 1, 1, 1, 1, 1, 1 },
{ 79, 75, 66, 67, 1, 1, 1, 3, 4, 5, 1, 1 },
{ 1, 1, 1, 1, 1, 1, 1, 2, 13, 14, 1, 1 },
{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
{ 54, 27, 24, 24, 23, 83, 24, 24, 24, 24, 26, 54 },
{ 15, 43, 9, 9, 23, 83, 9, 9, 9, 9, 25, 15 },
{ 54, 42, 33, 33, 23, 83, 33, 33, 33, 33, 34, 54 },
{ 1, 1, 1, 1, 84, 84, 1, 1, 1, 1, 1, 1 } };
// 图块常量
/** 每个图块的宽度 */
private final static int TILE_WIDTH = 16;
/** 每个图块的高度 */
private final static int TILE_HEIGHT = 16;
/** 场景1图片 */
Image screen_1 = null;
/** 地图原始图片 */
Image map0Img = null;
/** 人物原始图片 */
Image roleImg = null;
/** 人物的x坐标 */
int roleX = 100;
/** 任务的y坐标 */
int roleY = 100;
/** 人物宽度 */
private final static int ROLE_WIDTH = 16;
/** 人物高度 */
private final static int ROLE_HEIGHT = 32;
/** 人物方向 */
int direction;
/** 人物当前显示图片的序号 */
int currIndex = 0;
/** 人物连续移动的控制变量，-1代表不移动，其他方向和人物方向常量的规定相同 */
int roleMoveControl = -1;
/** 移动速度，每次2个像素 */
int speed = 4;
/** 不移动 */
private final static int NOT_MOVE = -1;
/** 人物方向常量 */
private final static int DIRE_LEFT = 9;
private final static int DIRE_RIGHT = 6;
private final static int DIRE_UP = 3;
private final static int DIRE_DOWN = 0;
/** 屏幕宽度 */
int width;
/** 屏幕高度 */
int height;
/** 可行走区域地图块序号 */
private int[] canMoveTile = { 1, 2, 3, 4, 5, 13, 14, 23, 32, 41, 50, 59,
66, 67, 83 };
/**武器名称*/
private String[] weaponName = {
"轩辕剑",
"浪宇刀",
"匕首"
};
/**武器价格*/
private int[] weaponPrice = {
1000,
2000,
100
};
public RPGCanvas() {
try {
map0Img = Image.createImage("/map.png");
roleImg = Image.createImage("/player.png");
} catch (Exception e) {
}
//全屏
this.setFullScreenMode(true);
width = this.getWidth();
height = this.getHeight();
// 启动线程
Thread th = new Thread(this);
th.start();
}
protected void paint(Graphics g) {
// 根据游戏状态实现绘制
switch (status) {
case SCREEN_1:
// 绘制场景
paintSCREEN_1(g);
// 绘制人物
paintRole(g);
break;
case WEAPON_SHOP:
paintWEAPON_SHOP(g);
break;
case DIALOAG_1:
paintDIALOAG_1(g);
break;
}
}
/**
* 绘制场景1的方法
*
* @param g
* 画笔
*/
private void paintSCREEN_1(Graphics g) {
// 构造地图图片
if (screen_1 == null) {
screen_1 = createScreen_1();
}
g.drawImage(screen_1, 0, 0, Graphics.LEFT | Graphics.TOP);
}
/**
* 绘制人物
*
* @param g
* 画笔
*/
private void paintRole(Graphics g) {
g.setClip(roleX, roleY, ROLE_WIDTH, ROLE_HEIGHT);
g.drawImage(roleImg, roleX - currIndex * ROLE_WIDTH, roleY,
Graphics.LEFT | Graphics.TOP);
// 恢复默认剪切区域
g.setClip(0, 0, width, height);
}
String weaponShopName = "武器店";
String left = "离开";
/**
* 绘制武器店界面
*
* @param g
* 画笔
*/
private void paintWEAPON_SHOP(Graphics g) {
//绘制背景
g.setColor(0);
g.fillRect(0, 0, width, height);
g.setColor(0xffffff);
//绘制标题
g.drawString(weaponShopName,90,10,Graphics.TOP | Graphics.LEFT);
//循环绘制
for(int i = 0; i < weaponName.length;i++){
//绘制武器名称
g.drawString(weaponName[i], 30,
50 + 30 * i, Graphics.TOP | Graphics.LEFT);
//绘制武器价格
g.drawString("" + weaponPrice[i], 150, 50 + 30 * i, Graphics.TOP | Graphics.LEFT);
}
//绘制按钮
g.drawString(left, 0, height, Graphics.BOTTOM | Graphics.LEFT);
}
/**
* 绘制对话
*
* @param g
* 画笔
*/
private void paintDIALOAG_1(Graphics g) {
}
private Image createScreen_1() {
// 创建和地图大小一样的图片
Image tempImg = Image.createImage(backmap0[0].length * TILE_WIDTH,
backmap0.length * TILE_HEIGHT);
// 绘制地图
Graphics g1 = tempImg.getGraphics();
// 循环绘制
for (int i = 0; i < backmap0.length; i++) { // 行
for (int j = 0; j < backmap0[i].length; j++) {
// 设置剪切区域
g1.setClip(j * TILE_WIDTH, i * TILE_HEIGHT, TILE_WIDTH,
TILE_HEIGHT);
// 计算图片坐标
int dx = (backmap0[i][j] - 1) % 9 * TILE_WIDTH;
int dy = (backmap0[i][j] - 1) / 9 * TILE_HEIGHT;
// 绘制图片
g1.drawImage(map0Img, j * TILE_WIDTH - dx,
i * TILE_HEIGHT - dy, Graphics.LEFT | Graphics.TOP);
}
}
return tempImg;
}
public void keyPressed(int keyCode) {
//System.out.println(keyCode);
// 根据游戏状态实现按键处理
switch (status) {
case SCREEN_1:
SCREEN_1_KeyPress(keyCode);
break;
case WEAPON_SHOP:
weapon_Shop_KeyPress(keyCode);
break;
case DIALOAG_1:
break;
}
}
/**
* 武器店事件处理
* @param keyCode
*/
private void weapon_Shop_KeyPress(int keyCode){
if(keyCode == -6){ //左软键
status = SCREEN_1; //切换到村庄
//处理坐标
roleX = 38;
roleY = 100;
//人物方向
direction = DIRE_DOWN;
//人物静止
roleMoveControl = NOT_MOVE;
}
}
public void keyReleased(int keyCode) {
// 根据游戏状态实现按键处理
switch (status) {
case SCREEN_1:
SCREEN_1_KeyRelease(keyCode);
break;
case WEAPON_SHOP:
break;
case DIALOAG_1:
break;
}
}
private void SCREEN_1_KeyPress(int keyCode) {
// 转换为游戏动作
int action = this.getGameAction(keyCode);
switch (action) {
case UP:
// 改变方向
direction = DIRE_UP;
// 控制移动
roleMoveControl = DIRE_UP;
break;
case DOWN:
// 改变方向
direction = DIRE_DOWN;
// 控制移动
roleMoveControl = DIRE_DOWN;
break;
case LEFT:
// 改变方向
direction = DIRE_LEFT;
// 控制移动
roleMoveControl = DIRE_LEFT;
break;
case RIGHT:
// 改变方向
direction = DIRE_RIGHT;
// 控制移动
roleMoveControl = DIRE_RIGHT;
break;
case FIRE:
break;
}
}
private void SCREEN_1_KeyRelease(int keyCode) {
// 转换为游戏动作
int action = this.getGameAction(keyCode);
switch (action) {
case UP:
case DOWN:
case LEFT:
case RIGHT:
roleMoveControl = NOT_MOVE;
}
}
Runtime rt = Runtime.getRuntime();
public void run() {
try {
while (true) {
// 延时
Thread.sleep(100);
// 逻辑处理方法
tick();
//判断
if(rt.freeMemory() < 100000){
System.gc();
}
// 重新绘制
repaint();
}
} catch (Exception e) {
}
}
/**
* 逻辑处理方法
*/
public void tick() {
// 根据游戏状态实现绘制
switch (status) {
case SCREEN_1:
roleMove();
break;
case WEAPON_SHOP:
break;
case DIALOAG_1:
break;
}
}
/**
* 人物移动处理方法
*/
private void roleMove() {
if (roleMoveControl != NOT_MOVE) { // 人物移动
//是否进入武器店
if(isDisplayWeaponShop()){
status = WEAPON_SHOP;
}
// 根据方向移动
switch (direction) {
case DIRE_LEFT:
// 向左移动
// 左边界检测
if (roleX - speed >= 0) {
roleX -= speed;
// 如果发生碰撞，则退回
if (collis()) {
roleX += speed;
}
}
break;
case DIRE_RIGHT:
// 向右移动
// 右边界检测
if (roleX + ROLE_WIDTH + speed <= width) {
roleX += speed;
// 如果发生碰撞，则退回
if (collis()) {
roleX -= speed;
}
}
break;
case DIRE_UP:
// 向上移动
// 上边界检测
if (roleY - speed >= 0) {
roleY -= speed;
// 如果发生碰撞，则退回
if (collis()) {
roleY += speed;
}
}
break;
case DIRE_DOWN:
// 向下移动
// 下边界检测
if (roleY + ROLE_HEIGHT + speed <= height) {
roleY += speed;
// 如果发生碰撞，则退回
if (collis()) {
roleY -= speed;
}
}
break;
}
// 动画
if (currIndex == direction + 1) {
currIndex = direction + 2;
} else {
currIndex = direction + 1;
}
} else { // 人物静止
currIndex = direction;
}
}
/**
* 碰撞检测
* 原理：以人物16X32区域的下半部12X12和地图坐标判断，
* 只有地图块 为可移动地图块数组的才能够行走
*
* @return true代表发生碰撞，false代表未碰撞
*/
private boolean collis() {
// 获得12X12区域的坐标,左上角
int leftX = roleX + 2;
int topY = roleY + 18;
// 计算左上角所在的地图图块的序号
int col = leftX / TILE_WIDTH;
int row = topY / TILE_HEIGHT;
if (!canMove(row, col)) {
return true;
}
// 右上角所在的地图图块的序号
col = (leftX + 12) / TILE_WIDTH;
if (!canMove(row, col)) {
return true;
}
// 左下角所在的地图图块的序号
col = leftX / TILE_WIDTH;
row = (topY + 12) / TILE_WIDTH;
if (!canMove(row, col)) {
return true;
}
// 右下角
col = (leftX + 12) / TILE_WIDTH;
if (!canMove(row, col)) {
return true;
}
// 如果都不满足，则返回false
return false;
}
/**
* 第row行第col列图块是否可行走
*
* @param row
* 行号，从0开始
* @param col
* 列号，从0开始
* @return true代表可以行走，false代表不能行走
*/
private boolean canMove(int row, int col) {
boolean b = false;
for (int i = 0; i < canMoveTile.length; i++) {
if (backmap0[row][col] == canMoveTile[i]) {
b = true;
break;
}
}
return b;
}
/**
* 是否进入武器店
* @return true代表进入
*/
private boolean isDisplayWeaponShop(){
// 获得16X16区域的坐标,左上角
int leftX = roleX;
int topY = roleY + 16;
// 计算左上角所在的地图图块的序号
int col = leftX / TILE_WIDTH;
int row = topY / TILE_HEIGHT;
//是否和门发生碰撞
if(backmap0[row][col] == 66){ //门
//status = WEAPON_SHOP;
return true;
}
// 右上角所在的地图图块的序号
col = (leftX + 12) / TILE_WIDTH;
//是否和门发生碰撞
if(backmap0[row][col] == 66){ //门
//status = WEAPON_SHOP;
return true;
}
return false;
}
}