commit | 502b7756f8bb7c8e1a17435e08f33a01d39ae30c | [log] [tgz] |
---|---|---|
author | Anton Hansson <hansson@google.com> | Wed Jan 06 12:16:54 2021 +0000 |
committer | Anton Hansson <hansson@google.com> | Thu Jan 07 12:52:53 2021 +0000 |
tree | 0b8667700005a0d28942746eaa916656cd9443d9 | |
parent | b7545f9e07683ec2ceb8f6def92dc324ab255484 [diff] |
Remove sdk.proto copy in derive_sdk dir Make a separate dir for proto files and define libraries there. Also remove some unnecessary options: - Two were java-specific, and this proto is only used in cpp code - The package name is not necessary as this proto is internal to this module. Bug: 173188089 Test: presubmit Change-Id: I1bfd29741898832e776aaf45ccf17eed598be267
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