The content provider/ resolver APIs provide a complicated, but robust way of transferring data between processes using a URI and the openInputStream() and openOutputStream() methods. Custom content providers have the ability to override the openFile() method with custom code to effectively resolve a URI into a Stream; however, the method signature of openFile() has a ParcelFileDescriptor return type and it is not clear how one might generate a proper representation for dynamically generated content to return from this method.
Returning a memory mapped InputStream from a content provider?
Are there examples of implementing ContentProvider.openFile() method for dynamic content in the existing code base? If not can you suggest source code or process for doing so?