Create Folder in Android

Create folder in Android

Add this permission in Manifest,

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

File folder = new File(Environment.getExternalStorageDirectory() + 
                             File.separator + "TollCulator");
boolean success = true;
if (!folder.exists()) {
    success = folder.mkdirs();
}
if (success) {
    // Do something on success
} else {
    // Do something else on failure 
}

when u run the application go too DDMS->File Explorer->mnt
folder->sdcard folder->toll-creation folder

How to create a directory folder in Android Studio?

Try to create package instead of a directory. Seems like Create New Package and Create New Directory will both just create a folder under lib directory.

In Android Studio, how do I create a folder for project documentation?

In the Project Structure you can switch from Android to Project.

The default Android view structures and minimalizes the directories and files so that you as a developer can easier navigate through your project.

The Project view shows everything just as you would see when you browse it with your file explorer on your OS.

I think that is what you search for to create files and directories in the root of the project.

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

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.

Can't create folder in internal storage

At the first time you run your application, the app external storage directory
at Android/data/<package.name>/files is not created until you call this method getExternalFilesDir(null) Twice.

So try this code..

//Essential for creating the external storage directory for the first launch
getExternalFilesDir(null); 

/*
 output->> /storage/emulated/0/Android/data/<package.name>/files 
*/
Log.i("HINT",getExternalFilesDir("").getAbsolutePath());

//Or create your custom folder
File outFile = new File(getExternalFilesDir(null).getParent(),"myfolder");
//make it as it is not exists
outFile.mkdirs();

/*
 output->> /storage/emulated/0/Android/data/<package.name>/myfolder
*/
Log.i("HINT",outFile.getAbsolutePath());

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