Air中File类获取地址的研究

Apple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

——————————————————————————————————

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

——————————————————————————————————

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"
——————————————————————————————————

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"

——————————————————————————————————

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"

——————————————————————————————————

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"

——————————————————————————————————

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

转载请保留作者信息