本文实例讲述了Android开发之底图局部加载移动的方法。分享给大家供大家参考，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){ 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。

更多关于Android相关内容感兴趣的读者可查看本站专题：《Android图形与图像处理技巧总结》、《Android开发入门与进阶教程》、《Android调试技巧与常见问题解决方法汇总》、《Android基本组件用法总结》、《Android视图View技巧总结》、《Android布局layout技巧总结》及《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。