Air中File类获取地址的研究

Adobe帮助文档中说得比较松散和含糊，这是自己实验得到的结果

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File.applicationDirectory

url = "app:/"

nativePath(IOS) = "/var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE/[app name].app"                //此文件夹是压缩包，只读

nativePath(WIN) = [绝对路径]

nativePath(Android) = ""

注意：不要在应用程序目录（AIR 应用程序的安装位置）中添加或删除内容。否则会损坏 AIR 应用程序，应用程序签名也将失效。AIR 默认不允许写入应用程序目录，因为该目录并非对所有操作系统上的所有用户帐户均为可写目录

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File.applicationStorageDirectory

url = "app-storage:/"

nativePath(IOS) = "/var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE/Library/Application Support/[app id]/Local Store"        //可写

nativePath(WIN) = "C:\Users\[UserName]\AppData\Roaming\[App Id]\Local Store"

nativePath(Android) = "/data/data/air.[appid]/ [appid]/Local Store"

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File.documentsDirectory

url = "file:///var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE/Documents"        //可写

url(Android)  = "file:///storage/emulated/0"

nativePath(IOS)  = "/var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE/Documents"

nativePath(WIN)  = "d:\Documents\[UserName]\My Documents"

nativePath(Android) = "/storage/emulated/0"

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File.desktopDirectory              

url = "file:///var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE/Desktop"

nativePath(IOS)  = "/var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE/Desktop"        //可写

nativePath(WIN)  = "d:\Documents\[UserName]\Desktop"

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File.userDirectory           

url = "file:///var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE"

url(Android) = "file:///storage/emulated/0"

nativePath(IOS)  = "/var/mobile/Applications/6D8923A6-2B86-4C46-AE7A-7B6AFB349DDE"               //可写

nativePath(WIN)  = "C:\Users\[UserName]"

nativePath(Android)  = "/storage/emulated/0"

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File.cacheDirectory

nativePath(Andorid) = /data/data/air. [appid]/cache

url( Andorid) = file:///data/data/air. [appid]/cache

由于AIR限制太多，实际操作中最好使用类似new File(File.applicationDirectory.resolvePath("sb.jpg").nativePath)的方式来获取File对象，保证最大权限

作者：Rainssong

来源：http://blog.sina.com.cn/rainssong

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