Visual Studio 2017 15.5.6更新后Android Emulator丢失问题求助

It sounds like the Visual Studio update threw your Xamarin Android development setup off balance—this is a common headache with major IDE updates, but let’s walk through targeted fixes to get things back on track:

1. Verify Xamarin & Android Components Are Fully Installed #

First, make sure the update didn’t skip or corrupt critical components:

• Open the Visual Studio Installer, select your 2017 instance, and click Modify.
• Under the Mobile development with .NET workload, confirm all checkboxes are selected (especially Xamarin.Android, Android SDKs, and related tools).
• Go to Tools > Options > Xamarin > Android Settings and double-check that the Android SDK Location points to your existing SDK folder—updates sometimes reset this path unexpectedly.

2. Reset Visual Studio Settings #

Corrupted settings often cause odd post-update behavior:

• Navigate to Tools > Import and Export Settings > Reset all settings.
• Save your current settings if you want to revert later, then reset to the default configuration. This fixes misconfigured tool integrations and path issues that might be hiding.

3. Repair the Xamarin Workload #

If the update partially installed components, repairing the workload can resolve corruption:

• In the Visual Studio Installer, select your instance and click Repair (focus on the Mobile development with .NET workload specifically). This will re-install Xamarin.Android and its dependencies from scratch, fixing any broken files from the update.

4. Fix Project Configuration Corruption #

Sometimes the project file loses Xamarin-specific metadata during updates:

• Right-click your Xamarin Android project > Unload Project, then right-click again > Edit [YourProjectName].csproj.
• Ensure the <ProjectTypeGuids> element includes the Xamarin Android GUID:

  <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
  

• Also confirm <AndroidApplication>true</AndroidApplication> is present in the main <PropertyGroup>.
• Reload the project after saving changes.

5. Clear Build Caches & Rebuild #

Old build artifacts can conflict with updated tools:

• Delete the bin and obj folders from your project directory manually.
• In Visual Studio, run Build > Clean Solution followed by Build > Rebuild Solution.
• Go to Tools > Options > Xamarin > Android Settings and click Clear Cache under the Build Cache section to remove leftover Xamarin build files.

6. Validate Android SDK & AVD Configurations #

Your existing SDK/AVD setup might be incompatible with the updated tools:

• Open Tools > Android > Android SDK Manager and verify that the SDK Platforms and Build Tools versions your project targets are still installed. Reinstall any missing or corrupted components.
• Delete existing AVDs via AVD Manager > Delete, then create a new AVD using a compatible system image (match your project’s target SDK version).
• For DDMS issues, open Android Device Monitor and go to Window > Reset Perspective to restore default layouts and settings.

7. Update Xamarin Components to the Latest Compatible Version #

Visual Studio 15.5.6 might ship with an older Xamarin version—check for updates:

• Go to Tools > Options > Xamarin > Other and click Check Now for updates. Install any available patches for Xamarin.Android to ensure compatibility with your updated IDE.

Start with these steps in order—most post-update Xamarin issues are resolved by verifying installations, resetting settings, or fixing project file corruption. Let me know if any of these steps resolve your problem, or if you hit specific errors along the way!

内容的提问来源于stack exchange，提问作者BlueMonkMN