How to get Android local files URI

深藏阁楼爱情的钟 2022-09-26 13:54 151阅读 0赞

[Posted by Dimitri | Oct 28th, 2010 | Filed under Programming][Posted by Dimitri _ Oct 28th_ 2010 _ Filed under_Programming]

![How to get Android local files URI thumbnail][]

When programming applications for Android that requires the playback of audio or video files, sometimes, there’s the need to obtain the URI of those media files instead of using a String for the absolute path. But what is a URI? A URI (Uniform Resource Identifier) is an address to an local or internet resource. It’s more like a standardized path syntax that allows pointing to a specific resource that’s available over the internet, however we are going to use it to point it to a local resource.

A URI is specially useful, when using the VideoView class to load a video located on the res folder or in the SD card. Passing the video file to the VideoView as a String won’t even work on an emulated Android device. This way, we need to get the URI of the file.

!['res' folder or SD Image][res_ folder or SD Image]

This can be used to get any file URI, at the 'res' folder or inside the SD Card.

To better explain how to obtain a file’s URI, let’s assume that we are trying to get the URI of a video named intro.3gp which is in the /res/raw folder. Here’s the code to get the URI:

1.  Uri introURI;  
2.  introURI = Uri.parse("android.resource://your.app.package/" + R.raw.intro);

Now let’s assume the same intro.3gp is at the root of the SD card. The code to correctly get the file’s URI would be:

1.  String introURI;  
2.  introURI = Uri.parse("file:///sdcard/intro.3gp");

And that’s it! This method can also be used to obtain any file URI. Expanding a little bit the previous example, to correctly play the video file while using the emulator, instead of usingsetVideoPath(String path) like:

1.  String introURI = "file:///sdcard/intro.3gp";  
2.  VideoView videoView;  
3.    
4.  //...Omitted videoView initialization...  
5.    
6.  videoView.setVideoPath(path);

Obtain the video URI, as show on the previous examples and use the setVideoURI(URI uri) method, like this:

1.  Uri introURI,  
2.  //obtain the URI of the video file from the 'res' folder  
3.  introURI = Uri.parse("android.resource://your.app.package/" + R.raw.intro);  
4.  //or get it the URI from a the video file at the SD card  
5.  //introURI = Uri.parse("android.resource://your.app.package/" + R.raw.intro);  
6.    
7.  VideoView videoView;  
8.    
9.  //...Omitted videoView initialization...  
10.   
11. videoView.setURI(introURI);

[Posted by Dimitri _ Oct 28th_ 2010 _ Filed under_Programming]: http://www.41post.com/1301/programming/how-to-get-android-local-files-uri
[How to get Android local files URI thumbnail]: /images/20220717/e8cdd92199fe4fa9be98f092c284c8e3.png
[res_ folder or SD Image]: /images/20220717/e507d12000c240ee9b82f6e4b5459a29.png