Android底图局部加载移动
Android底图局部加载移动
- 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();
- }
- }
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。
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