【移动应用开发技术】Android中怎么实现底图局部加载移动

【移动应用开发技术】Android中怎么实现底图局部加载移动

今天就跟大家聊聊有关Android中怎么实现底图局部加载移动，可能很多人都不太了解，为了让大家更加了解，在下给大家总结了以下内容，希望大家根据这篇文章可以有所收获。具体如下：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){