commit | deb7306e7604df00f6dcd032af18f66b200b8db8 | [log] [tgz] |
---|---|---|
author | Bill Yi <byi@google.com> | Sun Sep 13 07:59:06 2020 -0700 |
committer | Bill Yi <byi@google.com> | Sun Sep 13 07:59:06 2020 -0700 |
tree | 7cce5bc03232ed1dc250d32fcc555a7e3231bf38 | |
parent | 497a8f04476eb4af8abf47935d01fbf8c226c0ec [diff] | |
parent | a6f635788819ac441292143c40b473fc96ad207a [diff] |
Merge mainline-release 6664920 to stage-aosp-master - DO NOT MERGE Merged-In: I32c27f243ae63dd57a0ccd415540dca3dba6fb1d Change-Id: I40e79fd4c8dab565a69a68b563152b1fc0eb2436
SdkExtensions is a module that decides the extension SDK level of the device, and provides APIs for applications to query the extension SDK level.
The module is packaged in an apex, com.android.sdkext
, and has two components:
bin/derive_sdk
: Native binary that runs early in the device boot process and reads metadata of other modules, to set system properties relating to the extension SDK (for instance build.version.extensions.r
).javalib/framework-sdkextension.jar
: This is a jar on the bootclasspath that exposes APIs to applications to query the extension SDK level.derive_sdk
is a program that reads metadata stored in other apex modules, in the form of binary protobuf files in subpath etc/sdkinfo.binarypb
inside each apex. The structure of this protobuf can be seen here. The exact steps for converting a set of metadata files to actual extension versions is likely to change over time, and should not be depended upon.
The module exposes a java class SdkExtensions
in the package android.os.ext
. The method getExtensionVersion(int)
can be used to read the version of a particular sdk extension, e.g. getExtensionVersion(Build.VERSION_CODES.R)
.