Error: open failed: ENOENT (No such file or directory)

when a user picks a file from the gallery, there is no guarantee that the file that was picked was added or edited by some other app. So, if the user picks on a file that let’s say belongs to another app we would run into the permission issues. A quick fix for that is to add this code in the AndroidManifest.xml file:

<manifest ... >
  <application android:requestLegacyExternalStorage="true" ... >
    ...
  </application>
</manifest>

Note: For Android 11 refer Scope storage Enforcement Policy https://developer.android.com/about/versions/11/privacy/storage

The Pictures directory might not exist yet. It's not guaranteed to be there.

In the API documentation for getExternalStoragePublicDirectory(), the code ensures the directory exists using mkdirs:

File path = Environment.getExternalStoragePublicDirectory(
        Environment.DIRECTORY_PICTURES);
File file = new File(path, "DemoPicture.jpg");

try {
    // Make sure the Pictures directory exists.
    path.mkdirs(); 

...so it may be as simple as adding that path.mkdirs() to your existing code before you createTempFile.