commit | b1599a2a623192a62b08cfc1909fb1f39b1f80cb | [log] [tgz] |
---|---|---|
author | Xin Li <delphij@google.com> | Mon Nov 30 10:15:55 2020 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Mon Nov 30 10:15:55 2020 +0000 |
tree | baa1716eed58237b07084c2d61953ca0465a9f95 | |
parent | 15a0cee4c75ecf76a9a21ad0988cb8c5bf14717a [diff] | |
parent | 9a0d52b07fa94a36514ab3fa87fd0876c71b13af [diff] |
[automerger skipped] Skip rvc-qpr-dev-plus-aosp-without-vendor@6881855 am: 9a0d52b07f -s ours am skip reason: Change-Id I74116ca7a4eafd19821fc3c1c1d133489f97efd7 with SHA-1 055852de34 is in history Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/13122659 Change-Id: I5f4947cc6ef98759061a47e0b1f2b31296e06460
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)
.