[AIR] 对存储器(Storage Volume)监听

import flash.filesystem.StorageVolumeInfo;
import flash.events.StorageVolumeChangeEvent;
import flash.filesystem.StorageVolume;
import flash.filesystem.File;
var volumes:Vector.<StorageVolume >  = new Vector.<StorageVolume >   ;
volumes = StorageVolumeInfo.storageVolumeInfo.getStorageVolumes();
for (var i:int = 0; i < volumes.length; i++)
{
    trace(volumes[i].rootDirectory.nativePath);//每个装载的存储卷的根目录的本机路径
    trace(volumes[i].name);//存储卷名称，命名即为null
    trace(volumes[i].rootDirectory.getDirectoryListing());//存储卷根目录下文件列表
    trace(volumes[i].drive);//存储卷盘符
    //遍历所有存储卷根目录下是否存在DIGITALBOARD文件夹
    for (var j:int = 0; j<volumes[i].rootDirectory.getDirectoryListing().length; j++)
    {
        //trace(volumes[i].rootDirectory.getDirectoryListing()[j].name);
        if (volumes[i].rootDirectory.getDirectoryListing()[j].name == "DIGITALBOARD")
        {
            trace(volumes[i].rootDirectory.nativePath);
            trace(File.desktopDirectory);
            //var file:File = volumes[i].rootDirectory.nativePath
            var file:File = File(volumes[i].rootDirectory.resolvePath(volumes[i].rootDirectory.nativePath + "DIGITALBOARD"));//+File.separator
            trace(volumes[i].rootDirectory.nativePath+"DIGITALBOARD");
            //file.copyTo(File.desktopDirectory);
            //file.browseForOpen("打开");
            //file.addEventListener(Event.SELECT,onSelect);
            return;
        }
    }
}
function onSelect(e:Event):void
{
    trace("select",e.target.name);
}

//监听外部设备连接和断开状态
if (StorageVolumeInfo.isSupported)
{
    trace("平台支持 StorageVolumeInfo 类");
    //卷装入;
    StorageVolumeInfo.storageVolumeInfo.addEventListener(StorageVolumeChangeEvent.STORAGE_VOLUME_MOUNT, onVolumeMount);
    //存储卷卸载;
    StorageVolumeInfo.storageVolumeInfo.addEventListener(StorageVolumeChangeEvent.STORAGE_VOLUME_UNMOUNT, onVolumeUnmount);
}
else
{
    trace("平台不支持 StorageVolumeInfo 类");
}

function onVolumeMount(e:StorageVolumeChangeEvent):void
{
    trace( e.storageVolume.name,"检测到可移动磁盘" );
    //trace( e.storageVolume.fileSystemType );
    //trace( e.storageVolume.isRemovable );
    //trace( e.storageVolume.isWritable );
    //trace( e.storageVolume.rootDirectory );
    //trace( e.storageVolume.rootDirectory.nativePath );
}
function onVolumeUnmount(e:StorageVolumeChangeEvent):void
{
    trace( e.storageVolume.name,"卸载可移动磁盘" );
    //trace(e.storageVolume.drive);
}