commit | cb545c0f41330cebc2b20cef811c94c63f44d44c | [log] [tgz] |
---|---|---|
author | satayev <satayev@google.com> | Wed Mar 17 12:58:06 2021 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Wed Mar 17 12:58:06 2021 +0000 |
tree | a3f88e12817f0bc6dd3e401c200af31496802ac8 | |
parent | 1b6fdb3702eaad5f1e2222f8f7933c244d70e1ea [diff] | |
parent | 5a42935af2d8c2429654cb70913a37df3fb32a40 [diff] |
Merge "Introduce derive_classpath service." am: 0cf5324f6a am: 6773b10778 am: 5a42935af2 Original change: https://android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/1602413 Change-Id: I088dc6e14530614838341ac833f298cd02d7c6df
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)
.
For every new Android SDK level a new extension version should be defined. These are the steps necessary to do that:
derive_sdk.cpp
by:GetSdkLevel
with the new enum setderive_sdk_test.cpp
verifying the new extensions worksSdkExtensions.getExtensionVersion
API support the new extensions.RollbackManagerServiceImpl#getExtensionVersions
to account for the new extension version.