commit | a5a87a6d74ee78e50414008361be8148a3cb1941 | [log] [tgz] |
---|---|---|
author | Bob Badour <bbadour@google.com> | Mon Feb 22 12:24:10 2021 -0800 |
committer | Bob Badour <bbadour@google.com> | Mon Feb 22 21:52:10 2021 -0800 |
tree | ee246a6e09695a27f5684a92ba5bb11734069052 | |
parent | 2f87988f61b28e2066fd0fdae88d756d69c44391 [diff] |
DO NOT MERGE [LSC] Add LOCAL_LICENSE_KINDS to packages/modules/SdkExtensions Added SPDX-license-identifier-Apache-2.0 to: Android.bp derive_sdk/Android.bp framework/Android.bp gen_sdk/Android.bp proto/Android.bp testing/Android.bp tests/cts/Android.bp tests/e2e/Android.bp Bug: 68860345 Bug: 151177513 Bug: 151953481 Test: m all Exempt-From-Owner-Approval: janitorial work Change-Id: I7465ae8d0c7eb0df18d4518adc17cafe53c466cb Merged-in: I5dedd80b6d3ba86549d0faacccb7f89a9ec4f752 Merged-in: I586f12407412b9c8826585dd476cb5b564cdd679
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:
derive_sdk.cpp
by:GetSdkLevel
with the new enum setderive_sdk_test.cpp
verifying the new extensions worksSdkExtensions.getExtensionVersion
API support the new extensions.RollbackManagerServiceImpl#getExtensionVersions
to account for the new extension version.