Android：从内容URI获取文件URI？ [英] Android: Getting a file URI from a content URI?
问题描述
在我的应用程序中，用户是选择应用程序处理的音频文件。问题是，为了使应用程序做我想要的音频文件，我需要的URI是文件格式。当我使用Android的本地音乐播放器浏览应用程序中的音频文件时，URI是一个内容URI，如下所示：
In my app the user is to select an audio file which the app then handles. The problem is that in order for the app to do what I want it to do with the audio files, I need the URI to be in file format. When I use Android's native music player to browse for the audio file in the app, the URI is a content URI, which looks like this:
content://media/external/audio/media/710
然而，使用流行文件管理器应用程序Astro，我得到以下内容：
However, using the popular file manager application Astro, I get the following:
file:///sdcard/media/audio/ringtones/GetupGetOut.mp3
后者对我来说更容易使用，但当然我希望该应用有用户选择的音频文件的功能，无论他们用来浏览其收藏的程序如何。所以我的问题是，有没有办法将内容：//风格的URI转换成一个文件：// URI？否则，你会建议我如何解决这个问题？这是调用选择器的代码，供参考：
The latter is much more accessible for me to work with, but of course I want the app to have functionality with the audio file the user chooses regardless of the program they use to browse their collection. So my question is, is there a way to convert the content:// style URI into a file:// URI? Otherwise, what would you recommend for me to solve this problem? Here is the code which calls up the chooser, for reference:
Intent ringIntent = new Intent();
ringIntent.setType("audio/mp3");
ringIntent.setAction(Intent.ACTION_GET_CONTENT);
ringIntent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(Intent.createChooser(ringIntent, "Select Ringtone"), SELECT_RINGTONE);
非常感谢！请让我知道，如果我可以提供更多的代码来帮助回答。
Thank you very much! Please let me know if I can provide more code to help with answering.
我在内容URI中执行以下操作：
I do the following with the content URI:
m_ringerPath = m_ringtoneUri.getPath();
File file = new File(m_ringerPath);
然后用所述文件做一些FileInputStream的东西。
Then do some FileInputStream stuff with said file.
推荐答案
只需使用 getContentResolver（）。openInputStream（uri）获取 InputStream 从一个URI。
Just use getContentResolver().openInputStream(uri) to get an InputStream from a URI.
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