android directory size

Question

I need to calculate the physical size of a directory. The naive algorithm to do that could be :

public static long getFolderSize(File dir) {
long size = 0;
for (File file : dir.listFiles()) {
    if (file.isFile()) {
        System.out.println(file.getName() + " " + file.length());
        size += file.length();
    }
    else
        size += getFolderSize(file);
}
return size;
}

but how to deal with symbolic links ?

score 1 · Answer 1 · answered Feb 26 '12 at 08:50

1

getCanonicalPath() This typically involves removing redundant names such as "." and ".." from the pathname, resolving symbolic links (on UNIX platforms). http://docs.oracle.com/javase/1.4.2/docs/api/java/io/File.html

answered Feb 26 '12 at 08:50

lingceng

2,415
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score 0 · Answer 2 · edited May 23 '17 at 11:52

0

My solution to the first question – how to calculate physical size: How can I get the size of a folder on SD card in Android?

And here is solution how to detect symlinks: Java 1.6 - determine symbolic links

edited May 23 '17 at 11:52

Community

1
1

answered Oct 25 '13 at 18:01

Aleksejs Mjaliks

8,647
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score -1 · Answer 3 · answered Nov 22 '11 at 11:00

-1

You better use the other API to get the file size the API which is relevant to this would be

public static long getFolderSize(File dir) {
long size = 0;
for (File file : dir.listFiles()) {
    if (file.isFile()) {
        System.out.println(file.getName() + " " + file.getTotalSpace());
        size += file.getTotalSpace();
    }
    else
        size += getFolderSize(file);
}
return size;
}

answered Nov 22 '11 at 11:00

Dinesh Prajapati

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5
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2

The doc says for getTotalSpace() : "Returns the total size in bytes of the partition containing this path." -> it doesn't return the file size. + It's only available for api level 9 (i have to run on 1.6) – user954469 Nov 22 '11 at 11:11
+ the symbolic links can create circular reference. – user954469 Nov 22 '11 at 11:12

android directory size

3 Answers3