Getting directory list from URL in Android

问题:

How can we get the list of directories from a URL. e.g. from abc.com/myfolders? in Android.

If there are following folders in a URL
- abc.com/myfolders/folder1
- abc.com/myfolders/folder2
- abc.com/myfolders/folder3
- abc.com/myfolders/folder4

then how can the list be populated with

folder1
folder2
folder3
folder4

回答1:

Try with the following code

String absolutePath = "abc.com/myfolders/folder1";
        String directoryName = null;
        if((absolutePath != null) && (absolutePath.length()>0)){
        int indexOfFileSeparator = absolutePath.lastIndexOf("/");
        if (indexOfFileSeparator >= 0) {
            directoryName = absolutePath.substring(indexOfFileSeparator + 1);
        }
        }
        System.out.println("...shortStr..." + directoryName);

回答2:

You can't get a list of folders from a URL, unless the URL is configured to respond with the extra path elements that are valid. URLs are not necessarily a reflection of a server's file system, and therefore folder structure.

It sounds like you want something similar to the standard way some web servers allow for file browsing. I.e., when you navigate to

http://server/a/path/

the web server responds with a HTML page that lists the contents of that folder on the server.

Without that, you cannot find out the 'folders' within a URL.

If I've missed the point, then any of the other answers describing String concatenation should work.

回答3:

String shortStr = longStr.substring(longStr.lastIndexOf("/") + 1);

This should do it.

回答4:

I know it has been too late but i am posting this answer for other user's who is looking for same.

You can write PHP web service to get a list of file's located in particular folder of server.

<?php
    $path = realpath('uploadAudio');
    foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path)) as $filename)
        {
            if (strpos($filename,'extension of file like (.mp3) or (.txt)') !== false)
            $filenm= basename($filename);
?>
             <a href = "yourserverlink/Foldername/foldername/<?php echo $filenm ?>"><?php echo $filenm ?></a><br/>
<?php
       }
?>

and then call this service in your java or android code.