Android研究院之游戏开发地图编辑器（一）

	// 全屏显示窗口
	requestWindowFeature(Window.FEATURE_NO_TITLE);
	getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

	<activity android:name=".activity"
			  android:theme="@android:style/Theme.NoTitleBar.Fullscreen" />

public class mapAcitvity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
	// 全屏显示窗口
	requestWindowFeature(Window.FEATURE_NO_TITLE);
	getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
	//显示自定义的游戏View
	setContentView(new MapView(this));
    }

    public class MapView extends View{

        //tile块的宽高
	public final static int TILE_WIDTH = 32;
	public final static int TILE_HEIGHT = 32;

        //tile块的宽高的数量
	public final static int TILE_WIDTH_COUNT = 10;
	public final static int TILE_HEIGHT_COUNT = 15;

	//数组元素为0则什么都不画
	public final static int TILE_NULL = 0;
	//第一层游戏View地图数组
	public int [][]mMapView = {
		{ 1, 1, 1, 1, 137, 137, 137, 1, 1, 1 },
		{ 1, 1, 1, 1, 137, 137, 137, 1, 1, 1 },
		{ 1, 1, 1, 1, 137, 137, 137, 1, 1, 1 },
		{ 137, 137, 137, 137, 137, 137, 137, 137, 137, 137 },
		{ 137, 137, 137, 137, 137, 137, 137, 137, 137, 137 },
		{ 1, 1, 1, 1, 1, 1, 1, 1, 137, 137 },
		{ 1, 1, 1, 1, 1, 1, 1, 1, 137, 137 },
		{ 1, 1, 1, 1, 1, 1, 1, 1, 137, 137 },
		{ 1, 1, 1, 1, 1, 1, 1, 1, 137, 137 },
		{ 1, 1, 1, 1, 1, 1, 1, 1, 137, 137 },
		{ 1, 1, 1, 1, 1, 1, 1, 1, 137, 137 },
		{ 137, 137, 137, 137, 137, 137, 137, 137, 137, 137 },
		{ 137, 137, 137, 137, 137, 137, 137, 137, 137, 137 },
		{ 1, 1, 1, 1, 1, 137, 137, 137, 1, 1 },
		{ 1, 1, 1, 1, 1, 137, 137, 137, 1, 1 }
		};

	//第二层游戏实体actor数组
	public int [][]mMapAcotor  = {
		{ 102, 103, 103, 104, 0, 0, 0, 165, 166, 167 },
		{ 110, 111, 111, 112, 0, 0, 0, 173, 174, 175 },
		{ 126, 127, 127, 128, 0, 0, 0, 181, 182, 183 },
		{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
		{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
		{ 41, 42, 43, 44, 0, 0, 0, 0, 0, 0 },
		{ 49, 50, 51, 52, 0, 0, 0, 0, 0, 0 },
		{ 57, 58, 59, 60, 229, 230, 231, 232, 0, 0 },
		{ 65, 66, 67, 68, 237, 238, 239, 240, 0, 0 },
		{ 0, 0, 0, 0, 245, 246, 247, 248, 0, 0 },
		{ 0, 0, 0, 0, 0, 254, 255, 0, 0, 0 },
		{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
		{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
		{ 102, 103, 103, 103, 104, 0, 0, 0, 143, 144 },
		{ 110, 111, 111, 111, 112, 0, 0, 0, 143, 144 }
		};

	//第三层游戏碰撞物理层数组
	//下一章介绍
	//....................

	//游戏地图资源
	Bitmap mBitmap = null;

	//资源文件
	Resources mResources = null;

	//游戏画笔
	Paint mPaint = null;

	//横向纵向tile块的数量
	int mWidthTileCount = 0;
	int mHeightTileCount = 0;

	//横向纵向tile块的数量
	int mBitMapWidth = 0;
	int mBitMapHeight = 0;

	/**
	 * 构造方法
	 * @param context
	 */
	public MapView(Context context) {
	    super(context);

	    mPaint = new Paint();
	    mBitmap = ReadBitMap(context, R.drawable.map);
	    mBitMapWidth = mBitmap.getWidth();
	    mBitMapHeight = mBitmap.getHeight();
	    mWidthTileCount = mBitMapWidth / TILE_WIDTH;
	    mHeightTileCount = mBitMapHeight / TILE_HEIGHT;
	}

        @Override
        protected void onDraw(Canvas canvas) {
            DrawMap(canvas,mPaint,mBitmap);
            super.onDraw(canvas);

        }

        private void DrawMap(Canvas canvas,Paint paint ,Bitmap bitmap) {
            int i,j;
            for(i = 0; i< TILE_HEIGHT_COUNT; i++) {
        	for(j = 0; j<TILE_WIDTH_COUNT;j++) {
        	    int ViewID =  mMapView[i][j];
        	    int ActorID = mMapAcotor[i][j];
        	    //绘制地图第一层
        	    if(ViewID > TILE_NULL) {
        		 DrawMapTile(ViewID,canvas,paint,bitmap, j * TILE_WIDTH , i * TILE_HEIGHT);
        	    }

        	    //绘制地图第二层
        	    if(ActorID > TILE_NULL) {
        		DrawMapTile(ActorID,canvas,paint,bitmap, j * TILE_WIDTH , i * TILE_HEIGHT);
        	    }
        	}
            }
        }

        /**
         * 根据ID绘制一个tile块
         * @param id
         * @param canvas
         * @param paint
         * @param bitmap
         */
        private void DrawMapTile(int id,Canvas canvas,Paint paint ,Bitmap bitmap,int x, int y) {
            //根据数组中的ID算出在地图资源中的XY 坐标
            //因为编辑器默认0 所以第一张tile的ID不是0而是1 所以这里 -1
            id--;
            int count = id /mWidthTileCount;
            int bitmapX = (id - (count * mWidthTileCount)) * TILE_WIDTH;
            int bitmapY = count * TILE_HEIGHT;
            DrawClipImage(canvas,paint,bitmap,x,y,bitmapX,bitmapY,TILE_WIDTH,TILE_HEIGHT);
        }

        /**
         * 读取本地资源的图片
         * @param context
         * @param resId
         * @return
         */
        public Bitmap ReadBitMap(Context context, int resId){
            BitmapFactory.Options opt = new BitmapFactory.Options();
            opt.inPreferredConfig = Bitmap.Config.RGB_565;
            opt.inPurgeable = true;
            opt.inInputShareable = true;
            //获取资源图片
            InputStream is = context.getResources().openRawResource(resId);
                return BitmapFactory.decodeStream(is,null,opt);
        }  

        /**
	 * 绘制图片中的一部分图片
	 * @param canvas
	 * @param paint
	 * @param bitmap
	 * @param x
	 * @param y
	 * @param src_x
	 * @param src_y
	 * @param src_width
	 * @param src_Height
	 */
	private void DrawClipImage(Canvas canvas,Paint paint ,Bitmap bitmap, int x, int y, int src_x, int src_y, int src_xp, int src_yp) {
	    canvas.save();
	    canvas.clipRect(x, y, x + src_xp, y + src_yp);
	    canvas.drawBitmap(bitmap, x - src_x, y - src_y,paint);
	    canvas.restore();
	}
    }
}