Reading a file from Android device

Question

Continuing my previous post, upload file with relative path I tried to run using

url = '/mnt/sdcard/download/XYZ.txt';
File dir = Environment.getExternalStorageDirectory();
File f_path = new File(dir, url);
InputStream  fis = null;
fis = new BufferedInputStream(new FileInputStream(f_path));

But is throwing me errors when I run this from my Android device.

java.io.FileNotFoundException: /mnt/sdcard/mnt/sdcard/download/XYZ.txt (No such file or directory)

The output of f_path is '/mnt/sdcard/download/XYZ.txt'

Where is the problem, and how to fix it? I can observe that it is adding mnt/sdcard to f_path.

http://stackoverflow.com/questions/10992722/how-to-find-path-of-internal-phone-storage-personal-data-internal-sd-card-ext. May this link will help you. — Raghunandan, Oct 20 '12 at 06:37

score 4 · Accepted Answer · answered Oct 20 '12 at 07:52

4

Try with that code .

url = '/mnt/sdcard/download/XYZ.txt';
File f_path = new File(url);
InputStream  fis = null;
fis = new BufferedInputStream(new FileInputStream(f_path));

The exception had come coz Environment.getExternalStorageDirectory(); it self give equal to

/mnt/sdcard

Good luck !!

answered Oct 20 '12 at 07:52

dharmendra

7,835
5
38
71

yup. I got this. But as of knew about Environment.getExternalStorageDirectory(); is there any impact in removing that? – ChanChow Oct 20 '12 at 08:06
No there will not impact of it , as android directory stander is same for each device – dharmendra Oct 20 '12 at 08:18

Thiago Moura · Answer 2 · 2012-10-20T07:38:03.517

1

On your url variable, only use the relative path:

url = "/download/XYZ.txt"

The /mnt/sdcard will come from your Environment.getExternalStorageDirectory();

edited Oct 20 '12 at 07:38

answered Oct 20 '12 at 06:39

Thiago Moura

358
2
12

the url value I mentioned is returned to me by a file picker activity. So do I need to trim to get the url you mentioned? – ChanChow Oct 20 '12 at 07:59
If the file picker is returning the full path, create a file only having the url parameter. `File f_path = new File(url);` – Thiago Moura Oct 20 '12 at 08:11

Jai · Answer 3 · 2012-10-20T06:53:45.320

0

You have to do that as following :

 File sdcard = Environment.getExternalStorageDirectory();
 File file = new File(sdcard, "/download/XYZ.txt");

That will automatially get your file..

After that you can use it as following:

InputStream  fis = null;
fis = new BufferedInputStream(new FileInputStream(file.getAbsolutePath()));

That will get your file's path perfectly!!

edited Oct 20 '12 at 06:53

answered Oct 20 '12 at 06:47

Jai

1,974
2
22
42

It didn't work. Actually I am browsing the file into a edittext field. When I select the file, it returns the file path so that I can use to upload. – ChanChow Oct 20 '12 at 06:57
if you want to show file path into editext then of course you can get it using "file.getAbsolutePath()" function after writing: File sdcard = Environment.getExternalStorageDirectory(); File file = new File(sdcard, "/download/XYZ.txt"); – Jai Oct 20 '12 at 06:59
for my requirement I cannot give the hard coded value for file("/download/XYZ.txt". I am trying to browse through my mobile to select the file. Please look at my code. I need to upload the file after that. – ChanChow Oct 20 '12 at 07:00
I tried this and it worked.InputStream fis = null;fis = new BufferedInputStream(new FileInputStream(url); I removed first two lines of code. – ChanChow Oct 20 '12 at 07:31

Reading a file from Android device

3 Answers3