Android Developers Docs Reference added in API level 26 java.nio.file.spi Classes FileSystemProvider Service-provider class for file systems. FileTypeDetector A file type detector for probing a file to guess its file type. Classes FileSystemProvider FileTypeDetector Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated April 17, 2018.