tag | f037c87d0ab5908b247630c3b27184f6e060c7f1 | |
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tagger | The Android Open Source Project <initial-contribution@android.com> | Wed May 08 00:17:36 2024 -0700 |
object | e2c1132450295f9776ee5d8a6fe32be92367a793 |
Android CTS 13.0 Release 8 (11681990)
commit | e2c1132450295f9776ee5d8a6fe32be92367a793 | [log] [tgz] |
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author | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Wed Mar 06 21:31:20 2024 +0000 |
committer | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Wed Mar 06 21:31:20 2024 +0000 |
tree | 395ce59d4b67d6677568b4e2f34f9cc0470dd5ad | |
parent | a00cac3bfc5eb9be29ac438e1968f2b5e93bf466 [diff] | |
parent | f9d6219a1fcfd3acc1692474b6d25284ddcea757 [diff] |
Snap for 11537525 from f9d6219a1fcfd3acc1692474b6d25284ddcea757 to android13-tests-release Change-Id: I9eb85cfc45611ce1d327186ada487c5e6c2dea42
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.