commit | 42060a0bc09c3b76d457a75703182bd903cf3d52 | [log] [tgz] |
---|---|---|
author | satayev <satayev@google.com> | Tue Mar 23 11:35:47 2021 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Tue Mar 23 11:35:47 2021 +0000 |
tree | 6ff7baafba89f05f6a35f8ed3ef26127dd58c41e | |
parent | cb7520af40491a091ac4d5fe295471db48d33439 [diff] | |
parent | dafffe0fd98557f03ffd1133d49c6c2d63aecc25 [diff] |
Revert^2 "Introduce derive_classpath service." am: be3f8eabc8 am: 9c42120af7 am: dafffe0fd9 Original change: https://android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/1645673 Change-Id: Ie59e7a472596ae4da797a4cd2959f9b581a19d7a
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.