commit | 36ade50bd2b204ce155f9c1b2212e70775bd9587 | [log] [tgz] |
---|---|---|
author | Bob Badour <bbadour@google.com> | Wed Mar 17 12:53:17 2021 -0700 |
committer | Bob Badour <bbadour@google.com> | Wed Mar 17 12:53:17 2021 -0700 |
tree | 4feed75341c2be10beb14b9a9e6522a35b1ecbbf | |
parent | f9f9b0b77e3190bddb1d735fd769aa8374f5a4c5 [diff] |
[LSC] Add LOCAL_LICENSE_KINDS to packages/modules/SdkExtensions Added SPDX-license-identifier-Apache-2.0 to: derive_classpath/Android.bp Bug: 68860345 Bug: 151177513 Bug: 151953481 Test: m all Exempt-From-Owner-Approval: janitorial work Change-Id: Ia2cde48df770ae548303b0dc6a520daffdc0b1eb
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.