Document consumer to display EXTRA_INFO message

Document providers can return a EXTRA_INFO string in the cursor, this is to be displayed so the user can tell what is going on. I'd be great if you could display this message to the user.

        MatrixCursor result = new MatrixCursor(DEFAULT_DOCUMENT_PROJECTION) {
            public String extra_info = null;

            @Override
            public Bundle getExtras() {
                Bundle bundle = new Bundle();
                bundle.putBoolean(DocumentsContract.EXTRA_LOADING, extra_info != null);
                bundle.putString(DocumentsContract.EXTRA_INFO, "queryDocument: Connecting to server ...");
                return bundle;
            }
        };

        result.setNotificationUri(getContext().getContentResolver(), DocumentsContract.buildDocumentUri(BuildConfig.DOCUMENTS_AUTHORITY, documentId));
        return result;
    }

Many thanks!

Start by tracing how the Android document consumer handles cursor extras from DocumentsContract, especially EXTRA_LOADING and EXTRA_INFO. Confirm where provider results reach the user-facing UI, then verify that a provider-supplied EXTRA_INFO string such as "queryDocument: Connecting to server ..." is displayed while loading.