mycanvas.java

手机游戏demo,用tile实现地图图层

import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;
import java.io.IOException;
public class MyCanvas extends GameCanvas implements Runnable,CommandListener  
{
  private TiledLayerDemo midlet;//程序控制类
  private volatile Thread animationThread=null;//线程
  private TiledLayer mBackground;//地图
    private LayerManager mLayerManager;
  private int canvasHeight, canvasWidth;//屏幕高度/宽度
  private static int tileHeight,tileWidth;//地图的高度/
  private static int columns,rows;
  private static int mapWidth,mapHeight;
  private int MON = 1;//月亮moon
  private int SHN = 2;//闪烁shine
  private int STR = 3;//星星star
  private int AIR = 4;//夜空air
  private int ANI;//动画贴片animated
  
  private int aniStarIndex;
  private int aniCounter;

  private boolean isRun;  
  private int curX,curY;//当前viewer坐标

  
  private final int SLEEP=10;
  private Command exit;
  public MyCanvas(TiledLayerDemo midlet)
  {
    super(true);
    this.midlet = midlet;
    canvasHeight=getHeight();
    canvasWidth=getWidth();
    try{
    mBackground = createBackground();//创建背景
    }catch(IOException e){
    System.out.println("create error");
    }
    curX = -(mapWidth - canvasWidth)/2;
    curY = -(mapHeight - canvasHeight)/2;
    mBackground.setPosition(curX,curY);  
    exit=new Command("Exit", Command.STOP,1);
    this.addCommand(exit);
    this.setCommandListener(this);//两个按键
   }
 
  synchronized void start()
  {
    isRun=true;
    animationThread=new Thread(this);
    animationThread.start();

  }
  public void run()
  {
    Graphics g = this.getGraphics();
    try
    {
      while (isRun)
      {
      	tick();
      	render(g);
        Thread.sleep(SLEEP);
      }
    }
    catch(InterruptedException ie)
    {
      System.out.println(ie.toString());
    }
  }
  private void tick(){
     aniCounter++;
     if(aniCounter%6 == 0)
     mBackground.setAnimatedTile(ANI,SHN);
     else
     mBackground.setAnimatedTile(ANI,STR);
  }
 
  private TiledLayer createBackground()throws IOException {
    Image image = Image.createImage("/star.png");//创建背景图片
    TiledLayer tiledLayer = new TiledLayer(10, 10, image, 32, 32);//注意：背景的参数的设置！
    tileWidth = 32;
    tileHeight = 32; 
    columns = 10;
    rows = 10;
    mapWidth =tileWidth*columns;
    mapHeight = tileHeight*rows;
    ANI =  tiledLayer.createAnimatedTile(STR);
    int[] map = {//地图数组
       AIR,AIR,AIR,AIR,AIR, AIR,AIR,AIR,AIR,AIR,
       AIR,ANI,AIR,AIR,AIR, AIR,AIR,AIR,STR,AIR,
       AIR,AIR,STR,AIR,AIR, ANI,AIR,AIR,STR,AIR,
       AIR,AIR,AIR,MON,STR, AIR,AIR,STR,AIR,AIR,
       AIR,AIR,STR,STR,AIR, AIR,AIR,AIR,AIR,AIR,
       AIR,AIR,STR,AIR,ANI, AIR,AIR,AIR,ANI,AIR,
       AIR,AIR,AIR,AIR,AIR, STR,AIR,AIR,AIR,AIR,
       AIR,AIR,STR,AIR,AIR, AIR,AIR,AIR,AIR,AIR,
       AIR,STR,AIR,AIR,AIR, STR,AIR,AIR,AIR,AIR,
       AIR,AIR,AIR,AIR,AIR, AIR,AIR,AIR,AIR,AIR,
    };//显示地图
    for (int i = 0; i < map.length; i++) {
      int column = i % columns;
      int row = (i - column) / columns;
      tiledLayer.setCell(column, row, map[i]);//通过一个循环来设置tiledLayer
    }
    //tiledLayer.setAnimatedTile(SHN,STR);
    
   // tiledLayer.setCell(4,5, aniStarIndex);
    
    return tiledLayer;//返回
  }
  
  private void render(Graphics g){
    //mLayerManager.paint(g, 0, 0);
    mBackground.paint(g);
    flushGraphics();
  
  }
  synchronized void stop()
  {
    isRun=false;
  }
  public void commandAction(Command c, Displayable d)
  {
    //if any Exit key is pressed then exit
    if(c==exit)
    {
      midlet.exitMidlet();
    }

  }

 
 
}