tag | 8f5ecfd31376e426425474d9f509f0283f981df7 | |
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tagger | The Android Open Source Project <initial-contribution@android.com> | Tue Feb 13 22:07:48 2024 -0800 |
object | a00cac3bfc5eb9be29ac438e1968f2b5e93bf466 |
Android VTS 13.0 Release 7 (11394504)
commit | a00cac3bfc5eb9be29ac438e1968f2b5e93bf466 | [log] [tgz] |
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author | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Wed Dec 06 21:31:28 2023 +0000 |
committer | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Wed Dec 06 21:31:28 2023 +0000 |
tree | 51a80dd7e2107573f085a0fb1ea606bacdc531b4 | |
parent | 656ba07c9dc4ceb73f5cd151e45ea1a73e0403fd [diff] | |
parent | 7e200fd91673828a6d519853bb23d5b5b795b0cf [diff] |
Snap for 11184636 from 7e200fd91673828a6d519853bb23d5b5b795b0cf to android13-tests-release Change-Id: Id04e530e26053abe443da96dd7d800e0ef3dc8ea
SdkExtensions module is responsible for:
The module is packaged in an apex, com.android.sdkext
, and has several components:
bin/derive_classpath
: a native binary that runs early in the device boot process. It reads individual classpath configs files from the system and other modules, merges them, and defines the definition of *CLASSPATH environ variables.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.pb
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)
.
derive_classpath
service reads and merges individual config files in the /system/etc/classpaths/
and /apex/*/etc/classpaths
. Each config stores protobuf message from classpaths.proto
in a proto binary format. Exact merging algorithm that determines the order of the classpath entries is described in derive_classpath.cpp
and may change over time.
An extension is a way to group a set of modules so that they are versioned together. We currently define a new extension for every Android SDK level that introduces new modules. Every module shipped in previous versions are also part of the new extension. For example, all the R modules are part of both the R extensions and the S extensions.
The steps to define a new extension are:
derive_sdk.cpp
by:GetSdkLevel
with the new enum setderive_sdk_test.cpp
verifying the new extensions workSdkExtensions.getExtensionVersion
API support the new extensions.