commit | 33296f44167a728c11be28fe06f9d0e5817c8510 | [log] [tgz] |
---|---|---|
author | Xin Li <delphij@google.com> | Fri Oct 09 02:58:33 2020 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Fri Oct 09 02:58:33 2020 +0000 |
tree | c6f284e1486e1907b84c607dbd0e3ef3e4f3244e | |
parent | 055852de34ea85dc696fed47d077fceef5755361 [diff] | |
parent | d7cdc5e8ba6423713af770448efc01d9113f1694 [diff] |
[automerger skipped] Skip ab/6749736 in stage. am: 4b6831e1f2 -s ours am: d7cdc5e8ba -s ours am skip reason: Change-Id I64d70eabe501f590752029398843d0d5d71585be with SHA-1 6a22e3db29 is in history Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/12797501 Change-Id: Ia288f1e875ae7c6bf895a9d18338437538c2fad4
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)
.