tag | cde204d1e17acd3858b0d0d3d655b2a1c19a1fa0 | |
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tagger | The Android Open Source Project <initial-contribution@android.com> | Wed May 05 15:06:39 2021 -0700 |
object | b3e56812097e31875fe39f4fe162d0d6bc2c3bc6 |
Android mainline 11.0.0 release 18
commit | b3e56812097e31875fe39f4fe162d0d6bc2c3bc6 | [log] [tgz] |
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author | android-build-team Robot <android-build-team-robot@google.com> | Thu Feb 04 20:02:44 2021 +0000 |
committer | android-build-team Robot <android-build-team-robot@google.com> | Thu Feb 04 20:02:44 2021 +0000 |
tree | 1097908edf547d01327bf300d85f650917d309de | |
parent | 418a0479c4e336f446c3d72b139e4d7a65279545 [diff] | |
parent | e5155685166333e3b3c5599e2775e9c7751dba78 [diff] |
Snap for 7124398 from e5155685166333e3b3c5599e2775e9c7751dba78 to mainline-permission-release Change-Id: I8b5b02059c44b2a20cac10b7a33ce1c843f962df
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.