SDK 工具更新到 25.3.1 后，Android Studio 上的模拟器无法启动 [英] Emulator on Android Studio doesn't start after SDK tools update to 25.3.1

问题描述

今天将我的 Android SDK 工具更新到 25.3.1 后，模拟器将不再运行.

After updating my Android SDK tools today to 25.3.1, the emulator won't run anymore.

我可以打开 AVD 管理器.当我在列表中的一个模拟器上点击播放"时，我在 Android Studio 上看到下面的栏

I can open the AVD Manager. When I hit "Play" on one of the emulators on the list, I see the bar below on Android Studio

但是在进度条走到最后之后，什么也没有发生.

But then after the progress bar reaches the end, nothing happens.

我在 发行说明 中看到最新的更新对模拟器进行了更改，所以我想知道这是一个错误还是我遗漏了一些东西.

I see in the release notes that the latest update brought changes to the emulator so I'm wondering if that's a bug or I'm missing something about that.

我使用的是 Android Studio 2.3.

I'm using Android Studio 2.3.

有什么想法吗?

推荐答案

我在升级后遇到了同样的问题.我不知道是什么导致了配置问题，但我确实找到了解决方法.

I ran into the same problem after upgrading. I can't figure out what's causing the configuration problem but I did figure out a workaround.

首先，我尝试从命令行启动模拟器:

First, I tried to launch the emulator from the command line:

$ emulator @<name_avd_image>
emulator: ERROR: This AVD's configuration is missing a kernel file! Please ensure the file "kernel-ranchu" is in the same location as your system image.
emulator: ERROR: ANDROID_SDK_ROOT is defined (<android>/sdk) but cannot find kernel file in <android>/sdk/system-images/ sub directories

如果您使用 -verbose 标志运行 emulator，您可以获得更多信息.我尝试重新安装系统映像(例如带 Google API 的 Android API 25 x86)、Android Emulator 25.3.1，并重新创建 AVD，但没有任何效果.

You can get more information if you run emulator with the -verbose flag. I tried re-installing the system image (e.g. Android API 25 x86 w/ Google APIs), Android Emulator 25.3.1, and re-creating the AVD but nothing worked.

最后作为解决方法，我只是将 SDK 系统映像目录中的所有系统文件复制到 AVD 目录中:

Finally as a workaround, I just copied all of the system files from the SDK system images directory into the AVD directory:

示例:Pixel XL(Android API 25 x86，带 Google API)
来源:/sdk/system-images/android-25/google_apis/x86/
目的地:~/.android/avd/Pixel_XL_API_25.avd/

Example: Pixel XL (Android API 25 x86 w/ Google APIs)
SOURCE: <android>/sdk/system-images/android-25/google_apis/x86/
DESTINATION: ~/.android/avd/Pixel_XL_API_25.avd/

之后模拟器就启动了.这并不理想，但这阻碍了我的开发，所以我不得不重新启动并运行模拟器.我希望其他人能够找出配置中的问题.

After that the emulator started right up. It's not ideal, but this was blocking my development so I had to get the emulator up and running again. I hope someone else will be able to figure out what broke in the configuration.

更新:找出配置问题！

我注意到我定期看到控制台错误您的模拟器已过期，请通过启动 Android Studio 进行更新:"所以我决定检查:

I noticed I periodically was seeing the console error "Your emulator is out of date, please update by launching Android Studio:" so I decided to check:

$ which emulator
<$ANDROID_SDK_ROOT>/tools/emulator

在此线程的帮助下:

问题是有两个模拟器:一个在$ANDROID_SDK_ROOT/tools，另一个$ANDROID_SDK_ROOT/模拟器.$ANDROID_SDK_ROOT/tools 中的那个无法启动.将 $ANDROID_SDK_ROOT/emulator 放在前面$ANDROID_SDK_ROOT/tools 在您的 $PATH 变量中，它应该修复问题.

The problem is there are two emulators: one in $ANDROID_SDK_ROOT/tools, another one in $ANDROID_SDK_ROOT/emulator. The one in $ANDROID_SDK_ROOT/tools cannot start. Place $ANDROID_SDK_ROOT/emulator before $ANDROID_SDK_ROOT/tools in your $PATH variable, it should fix the problem.

注意:对于大多数 Mac 用户，您可以编辑 ~/.bash_profile 以更改这些设置，然后运行 ​​$source ~/.bash_profile 以加载更新.在我的特殊情况下，我还必须清除 $ANDROID_HOME 的旧值.

NOTE: For most Mac users, you can edit your ~/.bash_profile to change these settings and then run $source ~/.bash_profile to load the updates. In my particular case, I also had old values for $ANDROID_HOME that I had to clear out.

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