Android Studio加载项目时出现Unknown host 'proxy.ssn.net'错误求助

Hey there, let's work through this frustrating proxy error together. Even after tweaking Gradle settings, that Unknown host 'proxy.ssn.net' message is still blocking your build—here are some concrete steps to fix it:

1. Check Global Gradle Configuration #

Often, the global gradle.properties file overrides project-specific settings, so this is a common culprit:

• Windows: Navigate to C:\Users\<Your Username>\.gradle\gradle.properties
• macOS/Linux: Go to ~/.gradle/gradle.properties

Open the file and look for lines referencing proxy.ssn.net, like these:

systemProp.http.proxyHost=proxy.ssn.net
systemProp.http.proxyPort=8080
systemProp.https.proxyHost=proxy.ssn.net
systemProp.https.proxyPort=8080

Either delete these lines entirely or comment them out by adding a # at the start of each line. Save the file and restart Android Studio.

2. Verify Project-Level Gradle Settings #

Don't forget to check your project's local gradle.properties (in the root directory of your project). Search for any proxy.ssn.net entries here too, and remove or comment them out. This file can sometimes hold leftover proxy config that conflicts with your changes.

3. Reset Android Studio IDE Proxy Settings #

IDE-level proxy settings can clash with Gradle's config, so let's reset those:

1. Open Android Studio, go to File > Settings > Appearance & Behavior > System Settings > HTTP Proxy (on macOS, it's Android Studio > Preferences > ...)
2. Select the No proxy option
3. Click Apply then OK, and restart Android Studio.

4. Clear Gradle Cache #

Old cached data might be holding onto the invalid proxy settings. Here's how to clear it:

• Close Android Studio completely
• Delete the Gradle cache directory:
  • Windows: C:\Users\<Your Username>\.gradle\caches
  • macOS/Linux: ~/.gradle/caches
• Reopen your project—Gradle will redownload dependencies with the fresh settings.

5. Check System-Level Proxy Settings #

Your operating system's proxy could be forcing the proxy.ssn.net connection without you realizing:

• Windows: Go to Settings > Network & Internet > Proxy. Turn off "Automatically detect settings" and ensure no manual proxy entries point to proxy.ssn.net.
• macOS: Open System Settings > Network > Advanced > Proxy. Uncheck all enabled proxy options.
• Linux: In your terminal, run echo $http_proxy and echo $https_proxy. If either shows proxy.ssn.net, remove these environment variables from your shell config (like .bashrc or .zshrc).

6. Validate DNS Resolution #

If none of the above works, check if proxy.ssn.net is even a valid address. Run this command in your terminal:

ping proxy.ssn.net

If you get a "could not resolve host" error, this proxy address is invalid. Double-check if you're supposed to use this proxy (maybe a typo like proxy.ssn.com?) or confirm with your network admin. If you don't need a proxy at all, make sure all proxy configs from the steps above are cleared.

内容的提问来源于stack exchange，提问作者livemaker