AOSP Android HAL Reference (legacy) See the HAL guide for details about Android's Hardware Abstraction Layer (HAL). Data Structures Data Structure Index Data Fields File List Globals Deprecated 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 August 21, 2017.