How to create folder (Android R - Api 30)?

Question

Read that Android 11 has scoped storage, but I can't find any information, how can I create and use folder in /storage/emulated/0/ ? Old methods works only on api 29 and below :(

You can create a folder in /storage/emulated/0/Documents and other known folders. You create them in the same way as allways. — blackapps, Sep 22 '20 at 19:46
Thanks @blackapps but it must be impossible to create folder in root i meand not in document? — Amir, Jan 18 '22 at 21:40

score 11 · Answer 1 · edited Dec 28 '20 at 08:58

11

Since Android Q we can create folders in app specif storage. its path:

Android->data->package name->files->your folder

Use this:

File file;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
    file = new File (this.getExternalFilesDir(null) + path);
} else {
    file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + path);
}

if (!file.exists()) {
    file.mkdirs();
}

edited Dec 28 '20 at 08:58

Tomer Shetah

8,413
7
27
35

answered Dec 28 '20 at 08:39

dimvolk

338
3
9

your code works for me. Thanks. One thing : what is the cause of "null" ? – Noor Hossain Feb 17 '21 at 16:14
is type - direcory_music, picture etc. read here https://developer.android.com/reference/android/content/Context#getExternalFilesDir(java.lang.String) – dimvolk Feb 18 '21 at 17:56

score 5 · Accepted Answer · answered Sep 23 '20 at 06:46

On Android 11 the restrictions in Android 10 concerning access to external storage are much less.

Environment.getExternalStorageDirectory()

is readable again and

Environment.getExternalStoragePublicDirectory(...)

is writable for folders like Environment.DIRECTORY_DOCUMENTS and so on.

The Android OS is very picky using the right extensions for your files in most of those directories.

score 0 · Answer 3 · answered Apr 09 '23 at 19:38

Just if someone needs this piece of code, I am expanding the accepted answer:

Please note here I am creating two files, the first one is for the Directory where file is going to be written, second is for the file itself. You must check if the directory exists and create it, otherwise FileNotFoundException will be thrown.

File videoFile;
File videoDir;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
    //Android 11+
    videoDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES), File.separator + "YOUR_DIRECTORY_NAME");
    videoFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES), "/YOUR_DIRECTORY_NAME/" + videoName);
} else {
    //Old Android version
    videoDir = new File(Environment.getExternalStorageDirectory(), Environment.DIRECTORY_MOVIES + File.separator + "YOUR_DIRECTORY_NAME");
    videoFile = new File(Environment.getExternalStorageDirectory(), Environment.DIRECTORY_MOVIES + File.separator + "YOUR_DIRECTORY_NAME" + File.separator + videoName);
}
if(!videoDir.exists()) {
    if(!videoDir.mkdir()) {
        infoSB("No Storage Permission");
        return;
    }
}
try {
    if(!videoFile.exists()) {
        FileOutputStream fos = new FileOutputStream(videoFile);
        fos.write(response);
        fos.close();
    }
} catch (IOException e) {}

score -2 · Answer 4 · answered Sep 23 '20 at 07:40

-2

Step 1:

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

Step 2:

Environment.getExternalStorageDirectory().absolutePath + "/your_folder_name"

answered Sep 23 '20 at 07:40

Deep Rathod

63
6

How to create folder (Android R - Api 30)?

4 Answers4

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