commit | cc4454c93bdf1e97975dd506c8ca6b7c016efcbf | [log] [tgz] |
---|---|---|
author | Bill Yi <byi@google.com> | Thu Sep 17 21:57:23 2020 -0700 |
committer | Bill Yi <byi@google.com> | Thu Sep 17 21:57:23 2020 -0700 |
tree | 7cce5bc03232ed1dc250d32fcc555a7e3231bf38 | |
parent | 7650cd600defad7c72a746e7b83a6f50d46ae12f [diff] | |
parent | a6f635788819ac441292143c40b473fc96ad207a [diff] |
Merge mainline-release 6664920 to master - DO NOT MERGE Merged-In: Ia25a660c512345913aadd7aac701afe56c26ae7a Change-Id: I6abeeaec78753c05fce92ebcd425c0ffa8998fcb
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)
.