get folder names inside special directory

Question

I want to get folder names inside the special directory.

for example : inside /storage/sdcard/DCIM there is two sub folder name 100ANDRO and Camera

How can i achieve this ?

i tried :

ArrayList<File> files;
File directory = new File("/storage/sdcard/DCIM");

    File[] fList = directory.listFiles();

    for (File file : fList) {
        if (file.isDirectory()) {
            files.add(file);
        }
    }

but i get NullPointerException

This path `/storage/sdcard/DCIM` is not valid. See this [post](http://stackoverflow.com/questions/5118048/android-dcim-folder-path) — Phantômaxx, Nov 02 '15 at 09:04
@FrankN.Stein My question was not duplicate of what you marked — behrooz, Nov 02 '15 at 09:31

Jas · Accepted Answer · 2015-11-02T09:21:30.487

1

Always use Environment.getExternalStorageDirectory().getAbsoluteFile() instead of /storage/sdcard Try this :

File extStore = Environment.getExternalStorageDirectory();
String SD_PATH = extStore.getAbsolutePath()+"DCIM";

You need permissions to read from sdcard:

  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

edited Nov 02 '15 at 09:21

answered Nov 02 '15 at 09:04

Jas

3,207
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45

Thanks, you are right but the problem didn't change . – behrooz Nov 02 '15 at 09:07
again same problem ! is there any permission needed ? – behrooz Nov 02 '15 at 09:19
Didn't you add permissions?? – Jas Nov 02 '15 at 09:20
My mistake :) Thank you – behrooz Nov 02 '15 at 09:25
problem was with permission? – Jas Nov 02 '15 at 09:27
ya it was the problem and of course the path – behrooz Nov 02 '15 at 09:29
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/93960/discussion-between-behrooz-and-jas). – behrooz Nov 02 '15 at 09:32

score 0 · Answer 2 · answered Nov 02 '15 at 09:06

0

you need to init files ArrayList<File> files = new ArrayList<File>(); and yes Use Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) for directory path

answered Nov 02 '15 at 09:06

Sulabh Deep Puri

314
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13

thanks , i init files and use Envirement for directory and same problem – behrooz Nov 02 '15 at 09:20

get folder names inside special directory

2 Answers2