commit | 587abbeb3d6e10e36df2d5235afbb537ccfa8e33 | [log] [tgz] |
---|---|---|
author | Xin Li <delphij@google.com> | Tue Sep 01 22:10:29 2020 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Tue Sep 01 22:10:29 2020 +0000 |
tree | c6f284e1486e1907b84c607dbd0e3ef3e4f3244e | |
parent | a91362e94f2f2e25c60710be83454b15f164aaaf [diff] | |
parent | 4d5d5ec4901ea5891014bff01242bcf385ca97ed [diff] |
[automerger skipped] Merge Android R (rvc-dev-plus-aosp-without-vendor@6692709) am: bfef11fb4f -s ours am: b6c90a068c -s ours am: 4d5d5ec490 -s ours am skip reason: Change-Id Idf5a2998f68d66a46999dbc9d95930bea4367312 with SHA-1 06a38553a0 is in history Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/12469241 Change-Id: I3810c4e4f06bdb784afdb0ff77026133f9a37987
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)
.