rpgcanvas.java

J2ME开发的手机游戏需要安装诺基亚手机模拟器才能正常运行

import java.util.Random;
import java.util.Vector;

import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.LayerManager;

public class RpgCanvas extends GameCanvas implements Runnable {

//    定义屏幕宽和屏幕高的变量
   private  int screenwidth = getWidth();
   private int screenheight = getHeight();

   /**
    * 线程和笔属性
    */
   Thread t;
   Graphics g;
   
   //声明加载类
   Load load;
   
   /**
    * 主角属性
    */
// 声明主角类变量
   MainRole mrole;
   
 /**
  * 图层属性
  */
//   声明图层管理一
   LayerManager lmscene1;
//   声明图层管理二
   LayerManager lmscene2;
// 设置图层管理一的坐标
   int screenx, screeny;
//   检测转换场景的变量，初始为农场，值为2时变为房屋
   int scene=1;
//   声明图层背景图宽和高
   int imgbackgroundwidth = 512;
   int imgbackgroundheight = 512;
//   声明图层最后的坐标
   int lastscreenx, lastscreeny;
   
   /**
    * 键盘属性
    */
//   键盘输入索引值
   int inputmode = 0;
   
/**
 * 状态检测变量的声明
 */
//   声明控制小猫NPC的显示的变量
   boolean catchcat = false;
   boolean catchcat2 = false;
   
//   声明控制对话主斛选择的变量
	boolean showyesorno = false;
	
//	声明检测碰撞的变量
	boolean iscollide = false;
	
//	声明检测主角回话的变量
	boolean mainroleanswer = false;
	
	
/**
 * 对话变量
 */
	
//	声明对话肯定话语变量
	String missionmessage;
	
	int selecty = 152;
	
	
	Random r;
	
	
	Vector vectormessage;
	Vector vectorpicture;
	
	
	String curmessage;

	Image curpicture;
	
	int tempx = 0, tempy = 0;
   /**
    * 屏幕类构造方法，用于生成笔，线程，提取图片图层类，图层管理类等，
    * 启动线程
    */
    public RpgCanvas(boolean arg0) {
        super(arg0);
      
        g = getGraphics();
        t = new Thread(this);
        
        /*
         * 提取图片、图层、
         */
    	load = new Load();
    	
//    	生成主角对象，从Load类中取主角图片
    	mrole = new MainRole(load.imgrole, 16, 24, 50, 50,80,153);
    	
/*
 * 	    生成图层管理对象
 */
    	lmscene1 = new LayerManager();//生成图层管理一
    	
    	lmscene2 = new LayerManager();//生成图层管理二
    	
    	
    	r = new Random();
		
		vectormessage = new Vector();
		vectorpicture = new Vector();
		
		curmessage = null;
		missionmessage = null;
		curpicture = null;
		
    	t.start();
    	

    }

   /**绘画函数
    */
    void draw() {
        
		//清屏
		g.setColor(255, 255, 255);
		g.fillRect(0, 0, getWidth(), getHeight());
	
		if (scene==1)
		{
//		农场图层管理的显示窗口设置
		lmscene1.setViewWindow(screenx, screeny, screenwidth, screenheight);
//		向图层管理1添加图层的方法
		append();
		lmscene1.paint(g, 0, 0);
		}
		else if (scene==2)
		{
		    mrole.setPosition(mrole.roomx, mrole.roomy);
//			房屋图层管理的显示窗口设置
			lmscene2.setViewWindow(0, 0, screenwidth, screenheight);
			append2();
			lmscene2.paint(g, 0, 0);
		}
		
		
//		显示对话

		drawmessage();

		if (showyesorno == true) {
			drawlist();
		}
		if (missionmessage != null) {
			g.setColor(255, 255, 255);

			g.drawString(missionmessage, 0, 0, 0);
		}
		flushGraphics();
	}

//  绘制对话函数
	public void drawmessage() {
		if (curmessage != null) {
            //设置对话框的大小和颜色
            g.setColor(0, 0, 100);
            g.fillRect(0, getHeight() - 40, getWidth(), 40);

//            画回答问题NPC的BIG图
            g.drawImage(curpicture, 0, getHeight() - 40, 0);
            
            Font f = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_MEDIUM);
            g.setFont(f);
            g.setColor(255, 255, 255);
            if (curmessage.length() <= getWidth() / 12) {
                g.drawString(curmessage, 37, getHeight() - 40, 0);

            } else {
                int length = curmessage.length();
                int len = getWidth() / 12;
                int y = getHeight() - 40;
                int offset = 0;
                while (length > 0) {
                    g.drawSubstring(curmessage, offset, len, 37, y, 0);

                    y += 12;
                    offset += getWidth() / 12;
                    length -= getWidth() / 12;
                    if (length > getWidth() / 12) {
                        len = getWidth() / 12;
                    } else {
                        len = length;
                    }

                }
            }            
                     
//            画取消对话框提示
            Font ff = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN,Font.SIZE_SMALL);
            g.setFont(ff);
            g.setColor(255, 255, 255);
            g.drawString("Push FIRE", 130, getHeight() - 10, 0);
        }
    }
	
	/**画对话列表
	 * 
	 *
	 */
	 public void drawlist() {
//	      设置并画对话框的大小和颜色
 		g.setColor(0, 0, 100);
 		g.fillRect(0, getHeight() - 40, getWidth(), 40);
 		g.setColor(255, 255, 128);

// 		画主角选择答案的字符串
 		g.drawString("好的", 10, getHeight() - 30, 0);
 		g.drawString("不了", 10, getHeight() - 20, 0);

 		g.setColor(255, 255, 0);
 		g.fillArc(5, selecty, 5, 5, 0, 360);
 		
// 		画取消对话框提示
 		Font ff = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN,Font.SIZE_SMALL);
 		g.setFont(ff);
 		g.setColor(255, 255, 255);
 		g.drawString("Push FIRE", 130, getHeight() - 10, 0);
 	}
	 
	 
	 public void nextmessage() {
			if (vectormessage.size() > 0 && vectorpicture.size() > 0)	 
			{
				curpicture = (Image) vectorpicture.elementAt(0);
				curmessage = (String) vectormessage.elementAt(0);
			}

			if (Math.abs(tempx - mrole.x) > 4 || Math.abs(tempy - mrole.y) > 4) {
				curmessage = null;
				vectormessage.removeAllElements();
				vectorpicture.removeAllElements();
				showyesorno = false;
				iscollide = false;
			}
		}
	 
    /**得到随机数方法
     * 
     */
    int getrand(int m) {
		int n = r.nextInt();
		if (n < 0)
			n *= -1;
		n %= m;
		return n;
	}
/**    键盘输入函数
 */
    void input() {
        int key = getKeyStates();
        

        /*
         * 在农场上控制屏幕和主角的按键输入
         */      
        if (inputmode == 0) {

            if ((key & FIRE_PRESSED) != 0) {
                if (catchcat == true) {
                    load.property[0].setVisible(false);
                    catchcat2 = true;
                } else {
                    if (iscollide == true) {
                        showyesorno = true;
                        inputmode = 1;
                    }
                }
            }

            //            向上按键
            if ((key & UP_PRESSED) != 0) {
                //			    主角向上移动
                mrole.setFrame(mrole.directionup++);