# Android Asset Packaging Tool 2.0 (AAPT2) release notes

## Version 2.6
### `aapt2`
- Support legacy `configVarying` resource type.
- Support `<bag>` tag and treat as `<style>` regardless of type.
- Add `<feature-group>` manifest tag verification.
- Add `<meta-data>` tag support to `<instrumentation>`.

## Version 2.5
### `aapt2 link ...`
- Transition XML versioning: Adds a new flag `--no-version-transitions` to disable automatic
  versioning of Transition XML resources.

## Version 2.4
### `aapt2 link ...`
- Supports `<meta-data>` tags in `<manifest>`.

## Version 2.3
### `aapt2`
- Support new `font` resource type.

## Version 2.2
### `aapt2 compile ...`
- Added support for inline complex XML resources. See
  https://developer.android.com/guide/topics/resources/complex-xml-resources.html
### `aapt link ...`
- Duplicate resource filtering: removes duplicate resources in dominated configurations
  that are always identical when selected at runtime. This can be disabled with
  `--no-resource-deduping`.

## Version 2.1
### `aapt2 link ...`
- Configuration Split APK support: supports splitting resources that match a set of
  configurations to a separate APK which can be loaded alongside the base APK on
  API 21+ devices. This is done using the flag
  `--split path/to/split.apk:<config1>[,<config2>,...]`.
- SDK version resource filtering: Resources with an SDK version qualifier that is unreachable
  at runtime due to the minimum SDK level declared by the AndroidManifest.xml are stripped.

## Version 2.0
### `aapt2 compile ...`
- Pseudo-localization: generates pseudolocalized versions of default strings when the
  `--pseudo-localize` option is specified.
- Legacy mode: treats some class of errors as warnings in order to be more compatible
  with AAPT when `--legacy` is specified.
- Compile directory: treats the input file as a directory when `--dir` is
  specified. This will emit a zip of compiled files, one for each file in the directory.
  The directory must follow the Android resource directory structure
  (res/values-[qualifiers]/file.ext).

### `aapt2 link ...`
- Automatic attribute versioning: adds version qualifiers to resources that use attributes
  introduced in a later SDK level. This can be disabled with `--no-auto-version`.
- Min SDK resource filtering: removes resources that can't possibly be selected at runtime due
  to the application's minimum supported SDK level.