commit | 9a0d52b07fa94a36514ab3fa87fd0876c71b13af | [log] [tgz] |
---|---|---|
author | Xin Li <delphij@google.com> | Sat Nov 28 19:47:26 2020 -0800 |
committer | Xin Li <delphij@google.com> | Mon Nov 30 06:18:04 2020 +0000 |
tree | da4dbde571944f37047aa4df20fbe2020631ce3d | |
parent | b67e5b4032b2523b929e42798dd6e0f0ae5d417b [diff] | |
parent | 055852de34ea85dc696fed47d077fceef5755361 [diff] |
Skip rvc-qpr-dev-plus-aosp-without-vendor@6881855 Bug: 172690556 Merged-In: I74116ca7a4eafd19821fc3c1c1d133489f97efd7 Change-Id: I3d7af9de85f63417457cb469a8163c6f02fed11c
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)
.