可拖拽listview，可改变item位置

实现可改变子项位置的列表项。代码注释比较详细，用起很简单方便。

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

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

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2015-07-28 11:19  DragListview\
     文件         475  2015-07-28 10:53  DragListview\.classpath
     文件         848  2015-07-28 10:53  DragListview\.project
     目录           0  2015-07-28 11:19  DragListview\.settings\
     文件         177  2015-07-28 10:53  DragListview\.settings\org.eclipse.jdt.core.prefs
     文件         886  2015-07-28 10:53  DragListview\AndroidManifest.xml
     目录           0  2015-07-28 11:19  DragListview\assets\
     目录           0  2015-07-28 11:19  DragListview\bin\
     文件         886  2015-07-28 10:53  DragListview\bin\AndroidManifest.xml
     文件      307574  2015-07-28 11:18  DragListview\bin\DragListview.apk
     目录           0  2015-07-28 11:19  DragListview\bin\classes\
     目录           0  2015-07-28 11:19  DragListview\bin\classes\com\
     目录           0  2015-07-28 11:19  DragListview\bin\classes\com\liluo\
     目录           0  2015-07-28 11:19  DragListview\bin\classes\com\liluo\draglistview\
     文件         353  2015-07-28 10:53  DragListview\bin\classes\com\liluo\draglistview\BuildConfig.class
     文件         278  2015-07-28 11:03  DragListview\bin\classes\com\liluo\draglistview\DragListView$ExchangeDataListener.class
     文件        6353  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\DragListView.class
     文件        1362  2015-07-28 11:08  DragListview\bin\classes\com\liluo\draglistview\MainActivity$1.class
     文件        1937  2015-07-28 11:08  DragListview\bin\classes\com\liluo\draglistview\MainActivity$DragListAdapter.class
     文件        2390  2015-07-28 11:08  DragListview\bin\classes\com\liluo\draglistview\MainActivity.class
     文件         352  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$attr.class
     文件         473  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$dimen.class
     文件         447  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$drawable.class
     文件         528  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$id.class
     文件         448  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$layout.class
     文件         400  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$menu.class
     文件         484  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$string.class
     文件         443  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R$style.class
     文件         713  2015-07-28 11:16  DragListview\bin\classes\com\liluo\draglistview\R.class
     文件      696112  2015-07-28 11:18  DragListview\bin\classes.dex
     目录           0  2015-07-28 11:19  DragListview\bin\dexedLibs\
............此处省略58个文件信息