Java. Android. Writing content provider for WebView?

Question

Java

To load images in a WebView , a custom content provider was written that, by overriding the openFile method , must return a byte stream of binary image content.
However, there was the next snag. openFile returns a ParcelFileDescriptor , which can be obtained by calling

ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);

Where file is nothing but an instance of the File class .
I have an array of bytes ( byte[] ) - the binary content of the images. According to the terms of the TOR, the use of temporary files is not allowed. Thus, it is necessary to either create an in-memory File , without saving it to the SD card, or get the ParcelFileDescriptor in some other way.
A Google search and developer.android.com came up with the following code:

byte[] imageData = ...;
Parcel parcel = Parcel.obtain();
parcel.writeByteArray(imageData, 0, imageData.length);
return parcel.getFileDescriptor();

The method works successfully, no exceptions are thrown. But parcel.getFileDescriptor() returns null .
What could be the ways to solve this problem?