android游戏开发 深度解析利用位图绘制rpg地图

先贴代码
着我们采用surfaceview写

package com.mz.demo;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;

public class MySurfaceView extends SurfaceView implements Callback {
    private Paint paint;
    private Canvas canvas;
    private Bitmap map;
    private SurfaceHolder sfh;
    private int[][] test_map0 = {
            { 1, 1, 1, 1, 1, 1, 4, 1, 1, 4, 4, 1 },
            { 1, 1, 1, 1, 4, 4, 4, 4, 4, 4, 1, 1 },
            { 1, 4, 4, 4, 4, 1, 4, 4, 4, 4, 1, 1 },
            { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 },
            { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 },
            { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1 },
            { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1 },
            { 1, 4, 4, 4, 4, 4, 1, 1, 4, 3, 1, 4 },
            { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1 },
            { 1, 4, 4, 4, 1, 4, 1, 4, 4, 4, 4, 1 },
            { 1, 4, 4, 1, 4, 4, 4, 4, 1, 4, 4, 1 },
            { 1, 1, 1, 1, 1, 4, 4, 4, 4, 1, 4, 4 },
            { 1, 1, 1, 1, 1, 4, 4, 4, 4, 1, 4, 4 }
            };
    private int mapx = 0;// map地图的唯一坐标
    private int mapy = 0;
    private int titleW;// 每一个方块的宽度和高度
    private int titleH;
    private int n=0;// 每一行的方块数量
    public MySurfaceView(Context context) {
        super(context);
        sfh = this.getHolder();
        sfh.addCallback(this);
        paint = new Paint();
        paint.setAntiAlias(true);
        // 图片资源初始化
        map = BitmapFactory.decodeResource(getResources(), R.drawable.map);
        titleW = 32;
        titleH = 32;
        n = map.getWidth() / titleW;
    }

    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
        // TODO Auto-generated method stub

    }

    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        myDraw();

    }

    private void myDraw() {
        // TODO Auto-generated method stub
        canvas=sfh.lockCanvas();//实例化
        //中间代码绘图过程
        //i控制行输出,j控制列输出
        for(int i=0;ifor(int j=0;j//绘制一个矩形可视区域
                canvas.clipRect(j*titleW+mapx, i*titleH+mapy, (j+1)*titleW+mapx, (i+1)*titleH+mapy);
                //在每个矩形区域内，将原地图的指定的模块绘制在矩形区域内
                canvas.drawBitmap(map, j*titleW+mapx-((test_map0[i][j]-1)%n)*titleW, i*titleH+mapy-((test_map0[i][j]-1)/n)*titleH, paint);
                canvas.restore();
            }
        }
        sfh.unlockCanvasAndPost(canvas);//解锁画布
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // TODO Auto-generated method stub

    }

}