Why Does Creating Directories Fail in Android 10 and How Can I Fix It?

Unable to Create Directory in Android 10

Problem:

Creating directories in Android 10 using either File.mkdir() or Files.createDirectory() fails, resulting in false success status and an AccessDeniedException.

Error:

java.nio.file.AccessDeniedException: /storage/emulated/0/Pastebin

Cause:

Android 10 restricts access to external storage locations by default.

Solution:

Use Legacy Storage Access (Android 10 and 11 Only)

Add the following to the tag in the manifest:

android:requestLegacyExternalStorage="true"

This reverts to the legacy storage model, allowing existing external storage code to function.

Alternative Options

• Context Methods: Use methods on Context, such as getExternalFilesDir(), to access directories on external storage.
• Storage Access Framework: Use the Storage Access Framework to access documents and create folders.
• MediaStore: Use MediaStore for managing media content.

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