gamescreen.java

j2me游戏 j2me游戏j2me游戏j2me游戏j2me游戏j2me游戏j2me游戏

import javax.microedition.lcdui.*;
//import com.nokia.mid.ui.*;
import java.util.*;
public class gameScreen extends Canvas implements Runnable{//FullCanvas
  public Image bufferImg; //离屏画布  ---缓冲区图片
  public Graphics buffer_g;   //离屏画笔  ---缓冲区画笔
  public int screenW;//屏幕宽度，屏幕高度
  public int screenH;
  
  public final static int GAME=1;
  public final static int WIN=2;
  public final static int LOST=3;
  public final static int LEVELINFO=0;
  public final static int GAMEEND=4;
  public final static int PAUSE=4;
  
  public static int gameState=LEVELINFO;//初始状态为游戏
  
  public Image imLeft[];
  public Image imRight[];
  public Image imWin;
  public Image imLost;
  public Image imFruit[];
  
  public Vector allFruit;//保存所有水果
  public Random random;
  
  public int px;  //绳子的x坐标值
  public int py;  //绳子的y坐标值
  public final static int STOP=-1;
  public final static int PLEFT=0;
  public final static int PRIGHT=1;
  public int dir=STOP;
  public int oldDir=PRIGHT;
  
  public int nowFrame=0;//卡卡的图片的侦数
  public long lastTime;
  public boolean fire=false; //是否放出了绳子
  public int length=0; //绳子长度
  public boolean zoom=true;//没有超出屏幕
  public int count=0; //frame 计数器
  public static int countFruit=1; //水果出现的计数器（计时器）
  public int score;
  public int levellastTime;
  //苹果=0 西瓜=1 加分道具=2 加时间道具=3 多水果道具=4 加减速道具=5
  public int levelTypes[][]={//每关中允许出现的NPC类型
      {0,0,0,0,0,0},	{0,0,0,1,1,1},	{0,0,1,1,2,2},
      {0,0,1,1,2,3},	{0,0,1,2,3,4},	{0,1,2,3,4,5},
      {0,1,2,3,4,5},	{0,1,2,3,4,5},	{0,1,2,3,4,5},
      {0,1,2,3,4,5},	{2,2,2,3,4,3},	{0,1,2,3,4,5},
      {0,1,2,3,4,5},	{0,1,2,3,4,5},	{0,1,2,3,4,5},
      {0,1,2,3,4,5},	{2,3,2,3,2,3},	{0,1,2,3,4,5},
      {0,1,2,3,4,5},	{0,1,2,3,4,5}
  };
  private int levelScore[]=
      {0,500,600,	700,800,900,	1000,1200,1400,	
	   1600,1800,2000,	1000,2000,2000,	2000,2000,1000,
	   2000,2000,2000,2000
      };
  private int levelTime[]=
      {0,100,100,	100,100,100,	100,100,100,
	   100,100,100,	100,90,80,	70,60,50,
	   50,40,30,20
    };
  public int level;
  private int levelCount=20;
  public long levelStartTime;
  public static long drawtime; //剩余时间
  public long waitTime;
  public static int FruitSpeed=3;
  public static int snum=0;//获取道具数量
  public static int tnum=0;
  public static boolean addFlag=false;//
  public gameScreen()
  { screenW=this.getWidth(); //获取屏幕宽度
    screenH=this.getHeight();//获取屏幕高度
    bufferImg=Image.createImage(screenW,screenH);
    buffer_g=bufferImg.getGraphics();
    
    imLeft=new Image[2];
    imLeft[0]=gameStart.loadImage("/panda_l1.png");
    imLeft[1]=gameStart.loadImage("/panda_l2.png");
    imRight=new Image[2];
    imRight[0]=gameStart.loadImage("/panda_r1.png");
    imRight[1]=gameStart.loadImage("/panda_r2.png");
    
    imFruit=new Image[6];
    imFruit[0]=gameStart.loadImage("/f1.png");//苹果=0
    imFruit[1]=gameStart.loadImage("/f2.png");//西瓜=1
    imFruit[2]=gameStart.loadImage("/d1.png");//加分道具=2
    imFruit[3]=gameStart.loadImage("/d2.png");//加时间道具=3
    imFruit[4]=gameStart.loadImage("/d3.png");//多水果道具=4
    imFruit[5]=gameStart.loadImage("/d4.png");//加减速道具=5

    imWin=gameStart.loadImage("/win.png");
    imLost=gameStart.loadImage("/over.png");
    allFruit=new Vector();
    random=new Random();
    px=screenW/2-20;
    py=screenH-40;
    level=1;
    initLevel(level);//加载关卡信息
    Thread t=new Thread(this);
    t.start();
  }
  public void initLevel(int n)
  {
   level=n;
   this.levelStartTime=System.currentTimeMillis();
   this.levellastTime=this.levelTime[n];
   this.score=0;
   this.gameState=LEVELINFO;
   FruitSpeed=3;
   allFruit.removeAllElements();
   if(n==1)//如果是第一关初始化道具
   {
    tnum=snum=0;
   }
 }
 public void drawBack() //画背景
 { buffer_g.setColor(32,156,0);
   buffer_g.fillRect(0,0,screenW,screenH);
   buffer_g.setColor(255,255,255);

   buffer_g.drawString("分数： "+score+"       剩余时间： "+drawtime,5,5,Graphics.LEFT|Graphics.TOP);
   buffer_g.drawString("菜单",5,screenH-Font.getDefaultFont().getHeight(),0);

   buffer_g.setColor(40,200,20);
   buffer_g.drawString("第  "+this.level+"  关 ",50,screenH/2,Graphics.LEFT|Graphics.TOP);
   buffer_g.setColor(200,200,200);
   if(snum>0)
   buffer_g.drawString("S:  "+snum,130,screenH/2-Font.getDefaultFont().getHeight(),Graphics.LEFT|Graphics.TOP);
   if(tnum>0)
   buffer_g.drawString("T:  "+tnum,130,screenH/2+Font.getDefaultFont().getHeight(),Graphics.LEFT|Graphics.TOP);


 }
 public void drawFruit()//画水果
 { for(int i=0;i<allFruit.size();i++)
   {int tmp[]=(int [])allFruit.elementAt(i);
     buffer_g.drawImage(imFruit[tmp[0]],tmp[1],tmp[2],0);
   }
 }
 public void drawPanda()//画卡卡
 { switch(dir)
   {case STOP:
       switch(oldDir)
       {case PLEFT:
         buffer_g.drawImage(imLeft[nowFrame],px,py,0);
         break;
         case PRIGHT:
         buffer_g.drawImage(imRight[nowFrame],px,py,0);
         break;
        }
        break;
    case PLEFT:
        buffer_g.drawImage(imLeft[nowFrame],px,py,0);
        break;
    case PRIGHT:
        buffer_g.drawImage(imRight[nowFrame],px,py,0);
        break;
    }
 }
 public void drawWin()  //画过关
 {
      buffer_g.setColor(0);
      buffer_g.fillRect(0,0,screenW,screenH);
      buffer_g.setColor(255,255,255);
      buffer_g.drawString("游戏胜利",80,30,0);
      buffer_g.drawImage(this.imWin,30,30,0);
      count++;
      if(count>=40)
      {
        count=0;
        level++;
        if(level>levelCount)
        {
          gameState=GAMEEND;
        }else
        {
            this.initLevel(level);
        }
    }

 }
 public void drawLost() //画失败
 {
     buffer_g.setColor(0);
     buffer_g.fillRect(0,0,screenW,screenH);
     buffer_g.setColor(255,255,255);
     buffer_g.drawString("游戏失败",80,30,0);
     buffer_g.drawImage(this.imLost,30,30,0);
     count++;
     if(count>=40)
     {
       count=0;
       this.gotoMenu();
     }

 }

 public void drawLine()
 { if(zoom)
 {
   length += 5;
   ////碰撞
   for(int i=0;i<allFruit.size();i++)
   { int tmp[]=(int [])allFruit.elementAt(i);
     //if (((py - length)>=tmp[2])&&((py - length)<=(tmp[2])+25)&&(px>=tmp[1])&&(px<=tmp[1]+25))
     int x=px+20;
     int y=py-length;
     if((x<tmp[1])||
        (x>(tmp[1]+25))||
        (y<tmp[2])||
        (y>(tmp[2]+25)))
     { //没有碰撞collision
     }
     else
     {if(tmp[0]==2){ snum++;}
      else if(tmp[0]==3) {tnum++;}
      else if(tmp[0]==4) {//多水果
      Thread ts=new Thread()
       { public void run()
       {
         for(int i=0;i<10;i++)
         {addFlag=true;
           makeFruit();
            addFlag=false;
          try{ Thread.sleep(100);}catch(Exception e){}
         }

       }};
       ts.start();
      }
      else if(tmp[0]==5) {
         int stmp=Math.abs(random.nextInt()%2);
         if(stmp==0){FruitSpeed++;}
         if(stmp==1){FruitSpeed--;}
         }
      else{
        tmp[3] = 1; //被绳索抓取
      }
      if(tmp[0]>1){allFruit.removeElementAt(i);}
      zoom=false;
     }//end collision
   }
 }else
 {
   length-=5;
   if(length<=0){
      fire=false;
      zoom=true;
   }
 }

  if(length>py){
   zoom=false;
  }
  buffer_g.setColor(255,255,255);
  buffer_g.drawLine(px+20,py-length,px+20,py);
 }
 public void drawInfo()
 {buffer_g.setColor(0);
  buffer_g.fillRect(0,0,screenW,screenH);
  buffer_g.setColor(255,255,255);
  buffer_g.drawString("第"+level+"关",80,30,0);
  buffer_g.drawString("倒计时（秒） "+this.levelTime[level],30,50,0);
  buffer_g.drawString("通关分数    "+this.levelScore[level],30,70,0);
  count++;
  if(count>=30)
  {
    count=0;
    this.gameState=GAME;
  }
}
 public void drawEnd()
 {buffer_g.setColor(0);
  buffer_g.fillRect(0,0,screenW,screenH);
  buffer_g.setColor(255,255,255);
  buffer_g.drawString("恭喜",80,30,0);
  buffer_g.drawString("游戏通关",30,50,0);
  count++;
  if(count>=30)
  {
    count=0;
    this.gameState=PAUSE;
    gameStart.midlet.display.setCurrent(gameStart.midlet.menu);
  }

 }
 public void paint(Graphics g) {
    switch(gameState)
    {
    case LEVELINFO://关卡提示
      drawInfo();//绘制提示信息
      break;
    case GAME://游戏状态
      drawBack(); //画背景
      drawFruit();//画水果
      drawPanda();//画卡卡
      if(fire)drawLine();
      break;
    case WIN: //过关
      drawBack(); //画背景
      drawWin();
      break;
    case LOST://失败
      drawBack(); //画背景
      drawLost();
      break;
    case GAMEEND://通关
       drawEnd();
       break;
    }
    g.drawImage(bufferImg,0,0,Graphics.LEFT|Graphics.TOP);
  }

  public synchronized void makeFruit()
  { countFruit++;//定时300次时随机出现一种水果
    //  System.out.println("ok"+ random.nextInt());
   if(countFruit>300||addFlag)
    { countFruit=1;
      int tmp[]=new int[4];
      int ftype=Math.abs(random.nextInt()%6);
      tmp[0]=this.levelTypes[level-1][ftype];//NPC的值 0表示苹果 1 表示西瓜
      System.out.println("Level ="+level+"\t NPC的值 ："+tmp[0]);
      tmp[1]=-40;  //NPC的初始x轴坐标
      //tmp[2]  ==== //NPC的初始x轴坐标
      switch(ftype)//NPC不同出现的位置不同
      { case 0:
        tmp[2]=Math.abs((random.nextInt()%(screenH/2-50)))+(screenH/2);
        break;
        case 1:
          tmp[2]=Math.abs((random.nextInt()%(screenH/2+40)));
         break;
        case 2:
         tmp[2]=Math.abs((random.nextInt()%(screenH/2+40)));
        break;
        case 3:
         tmp[2]=Math.abs((random.nextInt()%(screenH/2+40)));
             break;
        case 4:
           tmp[2]=Math.abs((random.nextInt()%(screenH/2+40)));
            break;
        case 5:
          tmp[2]=Math.abs((random.nextInt()%(screenH/2+40)));
                             break;

      }
      tmp[3]=0;
      allFruit.addElement(tmp);
    }
    if(countFruit%FruitSpeed==0)
    {
    //移动水果
    for(int i=0;i<allFruit.size();i++)
    {int tmp[]=(int [])allFruit.elementAt(i);
     if(tmp[3]==0){
	     tmp[1]+=8;
	     if(tmp[1]>screenW)
	       {allFruit.removeElementAt(i);}
     }else
     { tmp[1]=px;
       tmp[2]=py-length;
       if(length<=0)
       {if(tmp[0]==0) score+=100;
        if(tmp[0]==1) score+=200;

        allFruit.removeElementAt(i);
        if(score>=levelScore[level]){
         this.gameState=WIN;
         allFruit.removeAllElements();
         System.gc();
        }
       }
     }

    }}
  }
  public void run()
  { while(true)
    { if(this.gameState==GAME)
      {//改坐标
        if (dir >= 0) {
          nowFrame++;
          if ( (nowFrame > 1)) {
            nowFrame = 0;
          }
        }else
        {nowFrame=0;
        }

        switch (dir) {
          case PLEFT:
            if (px > 0)
              px -= 8;
            break;
          case PRIGHT:
            if (px < screenW - 40)
              px += 8;
            break;
        }
        //产生水果
     makeFruit();
        ////倒计时
        drawtime=this.levellastTime-(lastTime-this.levelStartTime)/1000;
        if(drawtime<=0){this.gameState=LOST;}
      }

      //重绘
      this.repaint();
      this.serviceRepaints();
      long currTime = System.currentTimeMillis();

      long delay = 100 - (currTime - lastTime);
      lastTime = currTime;
      try { if (delay <= 0)
            delay = 1;
            Thread.sleep(delay);
      } catch (Exception exception) { }
       System.out.println(" state"+gameState);
    }

  }
  public void gotoMenu()
  {   if(gameState!=LOST)
      {
        gameStart.midlet.menu.insert(0,"返回游戏",null);
      }
       gameState=PAUSE;
       gameStart.midlet.display.setCurrent(gameStart.midlet.menu);
      waitTime=System.currentTimeMillis();
  }
  public void keyPressed(int n) {
    if(n==-6)
    {
      gotoMenu();
    }
    if(n==Canvas.KEY_NUM1){
     if(snum>0)
     {this.score+=200;
      snum--;
     }
    }
    if(n==Canvas.KEY_NUM3)
    {if(tnum>0)
      {this.levellastTime+=50;
       tnum--;
      }
    }
    if(!fire)
    {
      if (n == Canvas.KEY_NUM4 || n == -3) {
        dir = PLEFT;
      }
      if (n == Canvas.KEY_NUM6 || n == -4) {
        dir = PRIGHT;
      }
      if(n==Canvas.KEY_NUM5||n==-5)
      { fire=true;

      }
    }
    if(dir>=0)  oldDir=dir;
  }
  public void keyReleased(int n)
  {
   dir=STOP;
 }
 public void hideNotify() {
     if(gameState == GAME)
     {gameState = PAUSE;}

 }
 public void showNotify() {//来电之后自动调用
     if (gameState == PAUSE) {
      gameState = GAME;
    }
}


}