Unity集成Facebook SDK报错：Keystore文件缺失求助

Hey there, let's tackle this frustrating keystore error together. I've run into similar headaches when integrating SDKs with Unity, so here are some targeted checks to work through:

1. Double-Check Keystore Path in Facebook Settings #

• Make sure you’ve manually selected your Unity-generated keystore file in the Facebook Settings panel (usually under the Android tab). Empty fields or paths with spaces, non-ASCII characters (like Chinese), or hidden typos can break the SDK’s ability to locate the file.
• Try moving your keystore to a simple, clean path (e.g., C:\UnityKeystores\MyGame.keystore) and reselect it in the settings.

2. Verify JDK 1.8 Environment Variables Are Active #

• Even if you set JAVA_HOME and added it to your PATH, Unity might not pick up changes until you restart both Unity and your computer.
• Open a command prompt and run these commands to confirm:
  • java -version (should show JDK 1.8.x)
  • keytool -list (should run without errors)
• Ensure JAVA_HOME points to the JDK root folder (not the JRE subfolder) and that %JAVA_HOME%\bin is at the top of your PATH to avoid conflicts with other Java versions.

3. Validate OpenSSL Setup #

• The latest Facebook SDK relies on OpenSSL for certain operations, so confirm it’s properly accessible:
  • Run openssl version in a command prompt—if it returns an error, double-check that the OpenSSL bin folder is added to your system PATH (not just user PATH) and restart your terminal/Unity.
  • Test the underlying command manually: openssl sha1 -binary path/to/your/keystore.keystore | openssl base64. If this runs successfully, OpenSSL is configured correctly; if not, reinstall OpenSSL (stick to a stable, widely-used version like 1.1.x) and recheck the PATH.

4. Ensure Your Unity-Generated Keystore Is Valid #

• Use the JDK keytool to verify the keystore isn’t corrupted:
  • Run keytool -list -v -keystore path/to/your/keystore.keystore and enter your keystore password.
  • If this command returns your key’s details without errors, the keystore is good. If it throws "Keystore was tampered with" or similar errors, regenerate a new keystore in Unity (via Edit > Project Settings > Player > Android > Publishing Settings) and try again.

5. Sync Unity Android Player Settings with Facebook SDK #

• The Facebook SDK often pulls keystore info from Unity’s core Android settings. Go to Edit > Project Settings > Player > Android > Publishing Settings:
  • Load your keystore here first, enter the password, and confirm the key alias details.
  • After saving these settings, return to the Facebook Settings panel—this might resolve the "missing" error by syncing the correct keystore data.

6. Check Unity-Facebook SDK Compatibility #

• Even if both are "latest," there might be unreported compatibility gaps. Check the Facebook SDK for Unity release notes to confirm your exact Unity version is listed as supported. If not, try downgrading the Facebook SDK to the latest version that explicitly supports your Unity build (downgrading Unity is usually a last resort).

If none of these steps work, try clearing Unity’s Library folder (back it up first!) and reimporting the Facebook SDK—sometimes cached data can cause weird, hard-to-track issues.

内容的提问来源于stack exchange，提问作者Abhilash K Abhi