android底图局部加载移动-优快云博客

本文深入探讨了游戏开发领域的关键技术，包括cocos2dX、unity3d、Unreal Engine等游戏引擎的应用，以及OpenGL、OpenCV等图像处理技术在AR特效制作中的实践案例。

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public class MapMgr {
    public static MapMgr mapMgr = null;
    private int map_num = 28;
    private int b_x = 0;
    private int b_y = 0;
    private int width = 0;
    private int height = 0;
    private Bitmap bmpView = null;
    //create by danielinbiti，前提，你图片确实比屏幕大，如果不比屏幕大，下面注释行修改一下即可。
    public static void init(int width,int height){
    	if(mapMgr==null){
    		mapMgr = new MapMgr(width,height);
    	}
    }
    public static MapMgr getInstance(){
    	return mapMgr;
    }
    public MapMgr(int width,int height){
    	this.width = width;
    	this.height = height;
    	Bitmap bmp = PicMgr.getInstance().getBackGroundBitmap();
    	b_x = (bmp.getWidth()-width)/2;//保证图片比屏幕大
    	b_y = (bmp.getHeight()-height)/2;
    	bmpView = Bitmap.createBitmap(bmp, b_x, b_y, width, height);
    }
    public void logic(){
        
    }
    public void mapDown(){
    	Bitmap bmp = PicMgr.getInstance().getBackGroundBitmap();
    	if(b_y+height<bmp.getHeight()){
    		b_y = b_y + bmp.getHeight()/map_num;
    		if(b_y+height>bmp.getHeight()){
    			b_y = bmp.getHeight() - height;
    		}
    	}
    	bmpView = Bitmap.createBitmap(bmp, b_x, b_y, width, height);
    }
    public void mapUp(){
    	Bitmap bmp = PicMgr.getInstance().getBackGroundBitmap();
    	if(b_y>0){
    		b_y = b_y - bmp.getHeight()/map_num;
    		if(b_y<0){
    			b_y = 0;
    		}
    	}
    	bmpView = Bitmap.createBitmap(bmp, b_x, b_y, width, height);
    }
    public void mapLeft(){
    	Bitmap bmp = PicMgr.getInstance().getBackGroundBitmap();
    	if(b_x>0){
    		b_x = b_x - bmp.getWidth()/map_num;
    		if(b_x<0){
    			b_x = 0;
    		}
    	}
    	bmpView = Bitmap.createBitmap(bmp, b_x, b_y, width, height);
    }
    public void mapRight(){
    	Bitmap bmp = PicMgr.getInstance().getBackGroundBitmap();
    	if(b_x+width<bmp.getWidth()){
    		b_x = b_x + bmp.getWidth()/map_num;
    		if(b_x+width>bmp.getWidth()){
    			b_x = bmp.getHeight() - width;
    		}
    	}
    	bmpView = Bitmap.createBitmap(bmp, b_x, b_y, width, height);
    }
    public void draw(Canvas canvas){
    	Paint paint = new Paint();
    	if(bmpView!=null){
    		canvas.drawBitmap(bmpView,0, 0, paint);
    	}
    }
}

调用

public void onKeyDownDeal(int keyCode){
		if(keyCode==KeyEvent.KEYCODE_DPAD_UP){
			MapMgr.getInstance().mapUp();
    	}else if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN){
    		MapMgr.getInstance().mapDown();
    	}else if(keyCode==KeyEvent.KEYCODE_DPAD_LEFT){
    		MapMgr.getInstance().mapLeft();
    	}else if(keyCode==KeyEvent.KEYCODE_DPAD_RIGHT){
    		MapMgr.getInstance().mapRight();
    	}
	}

然后使用线程调用draw刷新即可。

对于触摸移动只是坐标计算方式不同，其它都类似。另外扩充到GIS等，可以根据小图片粘贴实现局部加载内容。