Android中如何实现底图局部加载移动

这篇文章主要介绍"Android中如何实现底图局部加载移动"，在日常操作中，相信很多人在Android中如何实现底图局部加载移动问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"Android中如何实现底图局部加载移动"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

具体代码如下：

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+heightbmp.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+widthbmp.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();    }}

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