Android 获取应用程序的“主页"数据目录 [英] Android Get Application's 'Home' Data Directory
问题描述
一个简单的问题,与应用程序写入内部存储器时的默认主"目录有关.默认情况下,操作系统 (2.2) 将创建的任何文件放置在:
A simple question, relating to the default 'home' directory when an app writes to the internal memory. By default, any files created are placed by the OS (2.2) in:
/data/data/your.package/files
读入文件时,使用相同的默认值,通过openFileInput()
、openFileOutput()
保持在适当的上下文中.但是如果我需要检查文件是否存在,例如使用 File 类,我需要在构造函数中指定整个路径.
When reading in files, the same default is used, when keeping in proper context via openFileInput()
, openFileOutput()
. But if I need to check file existence, for instance, using the File class, I need to specify the whole path in the constructor.
我看到有Environment.getDataDirectory()
(返回/data
),Environment.getRootDirectory()
(返回/system
) 等,但与获取应用的主"目录无关.
I see there are Environment.getDataDirectory()
(returns /data
), Environment.getRootDirectory()
(returns /system
), etc, but nothing related to getting the app's 'home' directory.
这不是什么大问题,但如果有某种方法,我宁愿不将完整路径硬编码到我的应用程序中以供文件使用(比如包名更改,比如未来操作系统版本中的路径更改)以编程方式引用应用的主"目录.
It's not a huge deal, but I'd rather not hard-code the full path into my App for File to use (say the package name changes, say the path changes in a future OS release) if there is some way to reference the app's 'home' directory programmatically.
推荐答案
当然,永远不会失败.在发布上述问题大约一分钟后找到了解决方案...针对可能遇到相同问题的人的解决方案:
Of course, never fails. Found the solution about a minute after posting the above question... solution for those that may have had the same issue:
ContextWrapper.getFilesDir()
在此处找到.
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