J2ME 游戏开发之层背景静态层

* TiledLayer(columns, rows, image, tileWidth, tileHeight)

* columns: layer包含多少列

* rows ： layer包含多少行

* image ： 待填充到layer的图片，一般由一些列的子图组成

* tileWidth ：每个字图的宽

* tileHeight： 每个字图的高

* layer.setCell(col, row, tileIndex)

* col : 图片填充的列

* row ：填充的行

* tileIndex： 地图索引 :如果为0的话，则绘制透明色

* setPosition(x, y): 设置层的位置

*getX(),getY() : 获得层的left和top位置

package com.slinw.TiledLayout;

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.TiledLayer;
import com.slinw.gamecanvas.RootGameCanvas;
import com.slinw.unit.Images;



/**
 * TiledLayer(columns, rows, image, tileWidth, tileHeight)
 *         columns: layer包含多少列
 *         rows   ： layer包含多少行
 *         image  ： 待填充到layer的图片，一般由一些列的子图组成
 *         tileWidth ：每个字图的宽
 *         tileHeight： 每个字图的高
 * 
 * layer.setCell(col, row, tileIndex)
 *         col : 图片填充的列
 *         row ：填充的行
 *         tileIndex： 地图索引  :如果为0的话，则绘制透明色
 * 
 * @author Administrator
 *
 */
public class StaticTiledLayout extends RootGameCanvas{

    private int LEA = 1;        //草地 lea
    private int FLD = 2;       //田地  field
    private int HSE = 3;       //house
    private int TRE = 4;       //tree
    private int WOD = 5;      //wood  树丛
    private int LAK = 6;     //leak
    
    private Image image;
    private TiledLayer bglLayer;
    
    private int curX = 100;
    private int curY = 100;
    private int moveX = 5;
    private int moveY = 5;
    
    public StaticTiledLayout(){
        
        initData();
        
    }
    
    private void initData(){
        image = Images.getImage("/background.png");
        
        bglLayer = createTiledLayer();
    }
    
    private TiledLayer createTiledLayer(){
        TiledLayer layer;
        int columns = 5;
        int rows = 5;
        int tileHeight = 36;
        int tileWidth = 78;
        
        //初始化层的行和列以及填充行和列的图片
        layer = new TiledLayer(columns, rows, image, tileWidth, tileHeight);
        
        //定义层显示的CELL格
        int[] cells = {
                LEA,FLD,TRE,FLD,FLD,
                LEA,LEA,LEA,WOD,LEA,
                HSE,LEA,HSE,WOD,FLD,
                WOD,LAK,HSE,LEA,WOD,
                HSE,LEA,LEA,TRE,LEA,
        };
        
        //填充行、列对应的图片
        for (int i = 0; i < cells.length; i++) {
            
            int col = i % columns;        
            int row = (i - col)/columns;        
            layer.setCell(col, row, cells[i]);        
        }
        
        return layer;
    }
    
    public void drawScreen(Graphics g) {
        // TODO Auto-generated method stub
        g.setColor(255,255,255);
        g.fillRect(0, 0, width, height);
        
        bglLayer.setPosition(curX, curY);
        bglLayer.paint(g);
        
        this.flushGraphics();
    }

    public void keyLeftPressedEvent() {
        // TODO Auto-generated method stub
        curX = curX - moveX;
        System.out.println("left**************");
    }

    public void keyRightPressedEvent() {
        // TODO Auto-generated method stub
        curX = curX + moveX;

    }

    public void keyUpPressedEvent() {
        // TODO Auto-generated method stub
        curY = curY - moveY;
    }

    public void keyDownPressedEvent() {
        // TODO Auto-generated method stub
        curY = curY + moveY;
    }

}