多点触控缩放图片

多点触控缩放图像~ 解决网上某些demo的问题：图像缩小后反弹导致图像变形、缩放功能和onClick、onLongClick事件混乱等

/** Automatically generated file. DO NOT MODIFY */
package com.dragimage;

public final class BuildConfig {
    public final static boolean DEBUG = true;
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2014-01-27 14:54  DragImageViewDemo\
     文件         475  2014-01-27 11:34  DragImageViewDemo\.classpath
     文件         853  2014-01-27 14:52  DragImageViewDemo\.project
     目录           0  2014-01-27 14:52  DragImageViewDemo\.settings\
     文件         177  2014-01-27 11:33  DragImageViewDemo\.settings\org.eclipse.jdt.core.prefs
     文件         873  2014-01-27 11:33  DragImageViewDemo\AndroidManifest.xml
     目录           0  2014-01-27 11:33  DragImageViewDemo\assets\
     目录           0  2014-01-27 14:58  DragImageViewDemo\bin\
     文件         873  2014-01-27 14:58  DragImageViewDemo\bin\AndroidManifest.xml
     目录           0  2014-01-27 14:58  DragImageViewDemo\bin\classes\
     文件      167104  2014-01-27 14:58  DragImageViewDemo\bin\classes.dex
     目录           0  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\
     目录           0  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\
     文件        5540  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\BitmapUtil.class
     文件         335  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\BuildConfig.class
     文件        1690  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\DragImageActivity$1.class
     文件        5671  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\DragImageActivity.class
     文件        1720  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\DragImageView$1.class
     文件        1153  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\DragImageView$MODE.class
     文件        1081  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\DragImageView$MyAsyncTask$1.class
     文件        3306  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\DragImageView$MyAsyncTask.class
     文件        7509  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\DragImageView.class
     文件         325  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$attr.class
     文件         446  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$dimen.class
     文件         421  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$drawable.class
     文件         410  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$id.class
     文件         394  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$layout.class
     文件         379  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$menu.class
     文件         457  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$string.class
     文件         416  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R$style.class
     文件         623  2014-01-27 14:58  DragImageViewDemo\bin\classes\com\dragimage\R.class
............此处省略58个文件信息