commit | cb39d9300124fed45f35347ae333cb77b3442e01 | [log] [tgz] |
---|---|---|
author | Anton Hansson <hansson@google.com> | Tue Dec 29 16:55:17 2020 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Tue Dec 29 16:55:17 2020 +0000 |
tree | 47def92d0fba9a0fd5b2b1e8bf9796bcc5ceb2b7 | |
parent | e8f706ab6f94e62c5a4fbab9344394500ad041fd [diff] | |
parent | 657372fafe683d4046b70ec1fa86cc67d7d47088 [diff] |
Add an sdk module for SdkExtensions am: 966175d41d am: d5efd9b036 am: 657372fafe Original change: https://android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/1536744 MUST ONLY BE SUBMITTED BY AUTOMERGER Change-Id: Ic5ad81cb86127dd659f55e6ad1fc6088529c8ed1
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:
SdkExtensions.getExtensionVersion
API support the new extensions.RollbackManagerServiceImpl#getExtensionVersions
to account for the new extension version.TODO(b/173188089): expand this section when derive_sdk is reimplemented