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<h1 id="2-2-0" class="showalways">Android Studio 2.2 (September 2016)</h1>

2.2.3（2016 年 12 月）

<p>
  This is a minor update to Android Studio 2.2. It includes a bug fixes
  focused around gradle, the core IDE, and lint.
</p>

<p>
  Highlighted build changes:
</p>

<ul>
  <li>ProGuard version rollback. Due to a <a href=
  "https://sourceforge.net/p/proguard/bugs/625/">correctness issue</a>
  discovered in ProGuard 5.3.1, we have rolled back to ProGuard 5.2.1. We
  have worked with the ProGuard team on getting a fix quickly, and we expect
  to roll forward to ProGuard 5.3.2 in Android Studio 2.3 Canary 3.
  </li>
  <li>Bug fix for <code>aaptOptions</code> <code>IgnoreAssetsPattern</code>
  not working properly (<a href="http://b.android.com/224167">issue
  224167</a>)
  </li>
  <li>Bug fix for Gradle autodownload for Constraint Layout library
    (<a href="https://code.google.com/p/android/issues/detail?id=212128">issue
    212128</a>)
  </li>
  <li>Bug fix for a JDK8/Kotlin compiler + dx issue (<a href=
  "http://b.android.com/227729">issue 227729</a>)
  </li>
</ul>

<p>
  <a href=
  "https://code.google.com/p/android/issues/list?can=1&amp;q=target%3D2.2.3+status%3AReleased+&amp;colspec=ID+Status+Priority+Owner+Summary+Stars+Reporter+Opened&amp;cells=tiles">
  See all bug fixes in 2.2.3</a>.
</p>

2.2.2（2016 年 10 月）

<p>
  This is a minor update to Android Studio 2.2. It includes a number of small
  changes and bug fixes, including:
</p>

<ul>
  <li>When reporting Instant Run issues through the IDE, the report now also
  includes logcat output for <code>InstantRun</code> events. To help us
  improve Instant Run, please <a href=
  "/studio/run/index.html#submit-feedback">enable extra logging and report
  any issues</a>.
  </li>
  <li>A number of small bug fixes for Gradle.
  </li>
  <li>A fix for problems with generating multiple APKs.
  </li>
</ul>

2.2.1（2016 年 10 月）

<p>
  This is a minor update to Android Studio 2.2. It includes several bug fixes
  and a new feature to enable extra logging to help us troubleshoot Instant
  Run issues—to help us improve Instant Run, please <a href=
  "/studio/run/index.html#submit-feedback">enable extra logging and report
  any issues</a>.
</p>

新規

新しい Layout Editor は、ConstraintLayout をサポートするカスタムビルドツールを備えています。

<li>New <strong><a href=
"http://tools.android.com/tech-docs/layout-inspector">Layout
Inspector</a></strong> lets you examine snapshots of your layout hierarchy
while your app is running on the emulator or a device.
</li>

<li>New <strong><a href="/studio/write/firebase.html">Assistant</a></strong>
window to help you integrate Firebase services into your app.
</li>

<li>New <strong><a href="/studio/debug/apk-analyzer.html">APK
Analyzer</a></strong> tool so you can inspect the contents of your packaged
app.
</li>

<li>New <strong><a href=
"http://tools.android.com/tech-docs/test-recorder">Espresso Test
Recorder</a></strong> tool (currently in beta) to help you create UI tests by
recording your own interactions.
</li>

<li>New <strong><a href=
"http://tools.android.com/tech-docs/build-cache">build cache</a></strong>
(currently experimental) to speed up build performance.
</li>

<li>New <strong>C/C++ build integration with CMake and ndk-build</strong>.
Compile and build new or existing native code into libraries packaged into
your APK, and debug using lldb. For new projects, Android Studio uses CMake
by default, but also supports ndk-build for existing projects. To learn how
to include native code in your Android application, read <a href=
"/studio/projects/add-native-code.html">Add C and C++ Code to Your
Project</a>. To learn how to debug native code with lldb, see <a href=
"/studio/debug/index.html#debug-native">Debug Native Code</a>.
</li>

<li>New <strong><a href="/studio/intro/index.html#sample-code">Samples
Browser</a></strong> so you can easily look up Google Android sample code
from within Android Studio to jump start app development.
</li>

<li>New <strong>Merged Manifest Viewer</strong> to help you diagnose how your
manifest file merges with your app dependencies across project build
variants.
</li>

<li>The <strong>Run</strong> window now contains log messages for the current
running app. Note that you can configure the <a href=
"/studio/debug/am-logcat.html">logcat Monitor</a> display, but not the
<strong>Run</strong> window.
</li>

<li>New <strong><a href="/studio/run/emulator.html">Android
Emulator</a></strong> features:
  <ul>
    <li>Added new <strong>Virtual</strong> <strong>Sensors</strong> and
    <strong>Cellular</strong> &gt; <strong>Signal Strength</strong> controls.
    </li>
    <li>Added an <strong>LTE</strong> option to the <strong>Cellular</strong>
    &gt; <strong>Network type</strong> control.
    </li>
    <li>Added simulated vertical swipes for scrolling through vertical menus
    with a mouse wheel.
    </li>
  </ul>
</li>

<li>New <strong><a href="/studio/run/rundebugconfig.html">Run/Debug
Configuration</a></strong> features:
  <ul>
    <li>The <strong>Debugger</strong> tab of the Android App and Android
    Tests templates now contain several new options for debugging with LLDB.
    </li>
    <li>The <strong>Profiling</strong> tab of the Android App and Android
    Tests templates now contain a <strong>Capture GPU Commands</strong>
    option for enabling GPU tracing. You can display GPU traces in the GPU
    Debugger (a beta feature).
    </li>
    <li>The Android Tests template now has a <strong>Firebase Test Lab Device
    Matrix</strong> option for the <strong>Deployment Target</strong>.
    </li>
    <li>The Native Application template has been deprecated. If you use this
    template in a project, Android Studio automatically converts it to the
    Android App template.
    </li>
    <li>The Android Application template has been renamed to Android App.
    </li>
  </ul>
</li>

<li>Improved installation, configuration, performance, and UI features in the
<strong><a href="/studio/debug/am-gpu-debugger.html">GPU
Debugger</a></strong> (currently in beta).
</li>

<li>Android Studio now comes bundled with <strong>OpenJDK 8</strong>.
Existing projects still use the JDK specified in <strong>File &gt; Project
Structure &gt; SDK Location</strong>. You can switch to use the new bundled
JDK by clicking <strong>File &gt; Project Structure &gt; SDK
Location</strong> and checking the <strong>Use embedded JDK</strong>
checkbox.
</li>

<li>Added new <strong>help menus and buttons</strong> in the UI so you can
more easily find the online documentation.
</li>

変更

IDE コードベースが IntelliJ 15 から IntelliJ 2016.1 にアップデートされました。
Instant Run を使用するには、ターゲットデバイスの API レベルに対応するプラットフォーム SDK をインストールすることが必要になりました。
ユーザーが仕事用プロファイルでアプリを実行している場合またはセカンダリユーザーとしてアプリを実行している場合、Instant Run は自動的に無効になります。
変更がデプロイされない問題やアプリがクラッシュする問題など、Instant Run の信頼性に関する多くの問題が修正されました。
- 一部のアプリアセットが実行中のアプリにデプロイされていませんでした（バグ: #213454）。
- Serializable クラスに対して serialVersionUID が定義されていない場合に、Instant Run セッションと非 Instant Run セッション間をユーザーが遷移すると、アプリがクラッシュしていました（バグ: #209006）。
- Instant Run にスタイルの変更が反映されませんでした（バグ: #210851）。
- Instant Run セッションの信頼性が低く、FileNotFoundException が発生していました（バグ: #213083）。
- ドローアブルに対する変更が、KitKat に対して完全な再ビルドを実行するまで反映されませんでした（バグ: #21530）。
- ネストされたパスがカスタム sourceSets に含まれる場合、Instant Run にリソースの変更が反映されませんでした（バグ: #219145）。
- 変更したクラスに列挙値を持つアノテーションが含まれる場合、ホットスワップとウォームスワップが機能しませんでした（バグ: #209047）。
- Instant Run にアノテーションデータの変更が反映されませんでした（バグ: #210089）。
- IDE の外部でコードに変更を加えた場合、Instant Run に変更が反映されませんでした（バグ: #213205）。
- セキュリティトークンが一致しないため、Instant Run セッションが信頼できませんでした（バグ: #211989）。
- run-as を適切にサポートしていないデバイスで、コールドスワップが失敗していました（バグ: #210875）。
- Instant Run の再起動後にアプリがクラッシュしていました（バグ: #219744）。
- Instant Run から Instant Debug に切り替える際、ClassNotFoundException が発生していました（バグ: #215805）。

<li>Improved performance for <strong>Gradle sync</strong> within the IDE,
especially for large projects.
</li>

<li>Improved build times for both full and incremental builds with new app
packaging code.
</li>

<li>Improved <strong>Jack compiler performance and features</strong>,
including support for annotation processors and dexing in process. To learn
more, read the <a href=
"/studio/releases/gradle-plugin.html#revisions">Android plugin for Gradle
2.2.0 release notes</a>.
</li>

<li>Removed the <strong>Scale</strong> AVD property from the AVD Manager.
</li>

<li>The Android Emulator <strong>-port</strong> and <strong>-ports</strong>
command-line options now report which ports and serial number the emulator
instance is using, and warn if there are any issues with the values you
provided.
</li>

<li>Improved the <strong><a href=
"/studio/write/create-java-class.html">Create New Class dialog</a></strong>
and the corresponding file templates. <strong>Note:</strong> If you've
previously customized the <strong>AnnotationType</strong>,
<strong>Class</strong>, <strong>Enum</strong>, <strong>Interface</strong>, or
<strong>Singleton</strong> file templates, you need to modify your templates
to comply with the new templates or you won’t be able to use the new fields
in the <strong>Create New Class</strong> dialog.
</li>

<li>Improved the <strong><a href=
"/studio/write/vector-asset-studio.html">Vector Asset Studio</a></strong>
user interface and added support for Adobe Photoshop Document (PSD) files.
</li>

<li>Improved the <strong><a href=
"/studio/write/image-asset-studio.html">Image Asset Studio</a></strong> user
interface.
</li>

<li>Improved the <strong>Theme Editor</strong>'s Resource Picker.
</li>

<li>Fixed memory leaks and reduced overall memory usage in Android Studio.
</li>

<li>Added a <strong>Background</strong> button in the <strong><a href=
"/studio/intro/update.html#sdk-manager">SDK Manager</a></strong> so you can
get back to work and install your packages in the background.
</li>

<li>Improved <strong><a href="/studio/intro/accessibility.html">Accessibility
features</a></strong>, including support for screen readers and keyboard
navigation.
</li>

<li>Enhanced <strong>Code Analysis</strong> includes code quality checks for
Java 8 language usage and more cross-file analysis.
</li>

<li>Several toolbar icons have changed.
</li>