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Android Studio 2.0（2016 年 4 月）

注意：如果您要为 N 开发者预览版开发应用，应使用 Android Studio 2.1 预览版。Android Studio 2.0 无法支持以 N 预览版为目标进行开发所需的全部功能。

Instant Run：

Android Studio 现在部署整洁 build 的速度比以往任何时候都快。此外，将增量代码更改推送到模拟器或实体设备几乎是即时的。您可以查看更新，而无需重新部署新的调试 build；在很多情况下，无需重启应用。

<li>Instant Run supports pushing the following changes to a running app:
  <ul>
    <li>Changes to the implementation of an existing instance method or
    static method
    </li>
    <li>Changes to an existing app resource
    </li>
    <li>Changes to structural code, such as a method signature or a static
    field (requires a target device running API level 21 or higher).
    </li>
  </ul>
</li>

<li>Read the documentation to learn more <a href=
"/tools/building/building-studio.html#instant-run">about Instant
Run</a>.
  <p class="note">
    <strong>Note:</strong> Instant Run is supported only when you deploy the
    debug build variant, use <a href=
    "/tools/revisions/gradle-plugin.html#revisions">Android plugin for
    Gradle version 2.0.0</a> or higher, and configure your app's module-level
    <code>build.gradle</code> file for <code>minSdkVersion 15</code> or higher.
    For the best performance, configure your app for <code>minSdkVersion
    21</code> or higher.
  </p>
</li>

lint 新增的内容：

使用 @IntDef 注解的整数检查 switch 语句，以确保所有常量均已处理。如需快速添加所有缺少的语句，请使用 intent 操作下拉菜单，然后选择 Add Missing @IntDef Constants。
用于使用字符串插值在 build.gradle 文件中插入版本号的错误尝试的标记。
用于扩展 Fragment 类的匿名类的标记。
用于不安全位置（例如 res/ 和 asset/ 文件夹）中的原生代码的标记。此标记会建议将原生代码存储在 libs/ 文件夹中，然后在安装时将该代码安全打包到应用的 data/app-lib/ 文件夹中。AOSP：#169950
用于对 Runtime.load() 和 System.load() 调用的不安全调用的标记。AOSP：#179980
通过从菜单栏中依次选择 Refactor > Remove Unused Resources 来查找和移除所有未使用的资源。未使用资源检测现在支持的资源仅限于由未使用的资源、原始文件中的参考（例如 .html 图片参考、以及 Gradle 资源压缩器使用的 tools:keep 和 tools:discard 属性）所引用的资源，同时考虑非活动源代码集（例如其他 build 变种中使用的资源）并正确处理静态字段导入。
检查 minSdkVersion 的所有目标平台是否支持隐式 API 引用。
标记 RecyclerView 和 Parcelable 的不当使用。
现在，系统还会针对 int 数组和可变参数对 @IntDef、@IntRange 和 @Size 检查进行检查。

其他方面的改进：

针对 Android 模拟器 2.0 进行了优化，使其比以往任何时候速度都快，支持更广泛的虚拟设备，并具有经过显著改进的界面。如需详细了解新模拟器，请参阅 SDK 工具版本说明。

<li>Improvements to the <a href=
"/tools/devices/managing-avds.html">Android Virtual Device
Manager</a>:
  <ul>
    <li>System images are now categorized under the following tabs:
    <em>Recommended</em>, <em>x86</em>, and <em>Other</em>.
    </li>
    <li>Under advanced settings, you can enable multi-core support and
    specify the number of cores the emulator can use.
    </li>
    <li>Under advanced settings, you can determine how graphics are rendered
    on the emulator by selecting one of the following options:
      <ul>
        <li>
          <strong>Hardware:</strong> use you computer's graphics card for
          faster rendering.
        </li>
        <li>
          <strong>Software:</strong> use software-based rendering.
        </li>
        <li>
          <strong>Auto:</strong> let the emulator decide the best option. This
          is the default setting.
        </li>
      </ul>
    </li>
  </ul>
</li>

<li>Improved AAPT packaging times by specifying deploy target before the app
is built. This allows Android Studio to efficiently package only the
resources required by the specified device.
</li>

<li>Added Cloud Test Lab integration to provide on-demand app testing with
the convenience and scalability of a cloud service. Learn more about how you
can <a href="/training/testing/start/index.html#run-ctl">use Cloud
Test Lab with Android Studio</a>.
</li>

<li>Added a preview of the new <a class="external-link" href=
"//tools.android.com/tech-docs/gpu-profiler">GPU Debugger</a>. For graphics
intensive applications, you can now visually step through your OpenGL ES code
to optimize your app or game.
</li>

<li>Added Google App Indexing Test. Add support for URLs, app
indexing, and search functionality to your apps to help drive more
traffic to your app, discover which app content is used most, and attract
new users. Test and validate URLs in your app all within Android
Studio. See <a href=
"/tools/help/app-link-indexing.html">Supporting URLs and App
  Indexing in Android Studio</a>.
</li>

<li>Upgrades from the latest IntelliJ 15 release, including improved code
analysis and performance. See <a class="external-link" href=
"https://www.jetbrains.com/idea/whatsnew">What's New in IntelliJ</a> for a
complete description of the new features and enhancements.
</li>

<li>XML editor auto-complete now adds quotations marks when completing
attributes. To check if this option is enabled, open the <b>Setting</b> or
<b>Preferences</b> dialogue, navigate to <b>Editor &gt; General &gt; Smart
Keys</b>, and check the box next to <b>Add quotes for attribute value on
attribute completion</b>. <a class="external-link" href=
"//b.android.com/195113">Issue: 195113</a>
</li>

<li>The XML editor now supports code completion for <a href=
"/topic/libraries/data-binding/index.html#layout_details">data binding</a>
expressions.
</li>