commit | b651c13b28bd2cba2cafd3091f4faf77757afe7d | [log] [tgz] |
---|---|---|
author | Anton Hansson <hansson@google.com> | Wed Dec 09 14:58:26 2020 +0000 |
committer | Anton Hansson <hansson@google.com> | Wed Dec 09 14:58:26 2020 +0000 |
tree | a8ad39c36bb3dd3074d93972a99762787c4e0d62 | |
parent | 4d1a894186e01f6a2aff4bb5fb303acfd7edd7ed [diff] |
Update version code for sdkextensions Bug: 174770911 Test: build & install the module on an R device Change-Id: I1e4776652a1d3d53f8ea69c6415199c0b48fca03
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)
.