Android Studio安装故障：模拟器未完成安装且出现javax.net.ssl.SSLException: Tag mismatch错误

I see you’ve shared a screenshot of this frustrating error where every other Android Studio component installs smoothly, but the Android Emulator fails with:

Error: javax.net.ssl.SSLException: Tag mismatch
Warning: An error occurred while preparing SDK package Android Emulator: Tag mismatch

I’ve run into this exact issue before, and it almost always boils down to corrupted download caches or SSL handshake hiccups. Here are the step-by-step fixes that worked for me and other developers:

1. Clear Android Studio’s SDK Cache (Most Likely Fix) #

Corrupted cache files are the #1 culprit here. Let’s wipe them and start fresh:

• Open Android Studio, go to Settings (Windows/Linux: File > Settings; Mac: Android Studio > Settings)
• Navigate to Appearance & Behavior > System Settings > Android SDK
• Switch to the SDK Tools tab, uncheck the "Android Emulator" box, and click Apply to uninstall it
• Close Android Studio entirely
• Locate your SDK’s cache folder:
  • Windows: C:\Users\<YourUsername>\.android\cache
  • Mac: ~/Library/Android/sdk/.android/cache
  • Linux: ~/.android/cache
• Delete every file in this folder (don’t worry, it’ll rebuild automatically)
• Reopen Android Studio, head back to SDK Tools, recheck "Android Emulator", and click Apply to reinstall

2. Temporary Switch to HTTP (Bypass SSL Verification) #

Sometimes network proxies or misconfigured SSL certificates block the HTTPS download. Try this temporary workaround:

• In SDK Manager, click the gear icon in the top-right corner and select SDK Update Sites
• For every entry starting with https://, edit the URL to use http:// instead (e.g., change https://dl.google.com/android/repository/addon-6.xml to http://dl.google.com/android/repository/addon-6.xml)
• Click Apply, then retry installing the Emulator
• Important: Once the Emulator installs successfully, switch the URLs back to https:// to keep your downloads secure

3. Manually Download & Install the Emulator #

If the above methods fail, manual installation is a surefire way to bypass the SDK Manager’s SSL issues:

• In SDK Manager’s SDK Tools tab, note the exact version of Android Emulator you need (e.g., 32.1.14)
• Download the corresponding Emulator zip file for your operating system (match your system architecture: x86_64/arm64)
• Navigate to your SDK installation directory, find the emulator folder, and replace all its contents with the extracted files from the zip
• Restart Android Studio, and the Emulator should now be recognized

4. Check Network Proxies & System SSL Certificates #

• If you’re using a corporate or third-party proxy, disable it temporarily—proxies often interfere with SSL handshakes and cause tag mismatch errors
• Verify your system’s root SSL certificates are up to date:
  • Windows: Open Certificate Manager, go to "Trusted Root Certification Authorities" and check for expired certificates
  • Mac: Open Keychain Access, navigate to "System Roots" and update any outdated certificates
  • Linux: Run sudo apt update && sudo apt install --reinstall ca-certificates (for Debian/Ubuntu-based distros)

内容的提问来源于stack exchange，提问作者Skar