Get the directory from a file path in java (android)

Question

Is there a function to get the directory part of a file path?

so from

String a="/root/sdcard/Pictures/img0001.jpg";

you get

"/root/sdcard/Pictures"

score 69 · Accepted Answer · answered Feb 18 '15 at 21:31

69

Yes. First, construct a File representing the image path:

File file = new File(a);

If you're starting from a relative path:

file = new File(file.getAbsolutePath());

Then, get the parent:

String dir = file.getParent();

Or, if you want the directory as a File object,

File dirAsFile = file.getParentFile();

answered Feb 18 '15 at 21:31

nanofarad

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3

If you're using a relative path like `File f = new File("file.txt");` be aware that `f.getParent()` will return `null`, not the parent – yate Feb 18 '15 at 21:35
How to extract path till "/root/sdcard/" or "/root/internal/" from file name ? – SimpleCoder Jul 14 '16 at 18:32
@hexafraction, JUST POSTED A QUESTION http://stackoverflow.com/questions/38381871/get-root-directory-i-e-external-or-external-sdcard-from-file-path – SimpleCoder Jul 14 '16 at 18:43

user370305 · Answer 2 · 2015-02-18T21:36:46.157

12

A better way, use getParent() from File Class..

String a="/root/sdcard/Pictures/img0001.jpg"; // A valid file path 
File file = new File(a); 
String getDirectoryPath = file.getParent(); // Only return path if physical file exist else return null

http://developer.android.com/reference/java/io/File.html#getParent%28%29

edited Feb 18 '15 at 21:36

answered Feb 18 '15 at 21:32

user370305

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score 3 · Answer 3 · answered Feb 18 '15 at 22:17

You could also use FilenameUtils from Apache. It provides you at least the following features for the example C:\dev\project\file.txt:

the prefix - C:\
the path - dev\project\
the full path - C:\dev\project\
the name - file.txt
the base name - file
the extension - txt

score 0 · Answer 4 · edited Sep 12 '16 at 07:14

I have got solution on this after 4 days, Please note following points while giving path to File class in Android(Java):

Use path for internal storage String path="/storage/sdcard0/myfile.txt";
path="/storage/sdcard1/myfile.txt";
mention permissions in Manifest file.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
First check file length for confirmation.
Check paths in ES File Explorer regarding sdcard0 & sdcard1 is this same or else......

e.g.

File file=new File(path);
long=file.length();//in Bytes

Get the directory from a file path in java (android)

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