执行Google登录后端认证步骤时遇silentSignIn()方法找不到错误求助

Hey there, let's work through this frustrating error you're hitting. I've dealt with similar Google Sign-In quirks before, so here are the most common fixes to get silentSignIn() working:

• Verify your Play Services Auth dependency version
  The silentSignIn() method is part of newer versions of the Google Sign-In library. If you're using an outdated dependency, it won't exist. Open your module-level build.gradle file and make sure you have a recent stable version of the auth library, like:

  implementation 'com.google.android.gms:play-services-auth:20.7.0'
  

  After updating, sync your project with Gradle files.

• Ensure you're using the correct GoogleSignInClient instance
  Double-check that you're creating your sign-in client the right way—using the modern GoogleSignIn.getClient() method, not the deprecated GoogleApiClient. Here's the correct setup pattern:

  GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
          .requestIdToken(getString(R.string.default_web_client_id))
          .requestEmail()
          .build();
  
  GoogleSignInClient mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
  

  Only this GoogleSignInClient instance has the silentSignIn() method.

• Check your import statements
  It's easy to accidentally import the wrong class. Make sure your code has this import at the top:

  import com.google.android.gms.auth.api.signin.GoogleSignInClient;
  

  If you see an import for an older or different sign-in class, replace it with this one.

• Clean, rebuild, and invalidate caches
  Android Studio's build cache can sometimes hold onto old code definitions. Try these steps in order:

  1. Go to Build > Clean Project
  2. Then Build > Rebuild Project
  3. If that doesn't work, go to File > Invalidate Caches... > Invalidate and Restart

• Fix ProGuard/R8 obfuscation
  If you have obfuscation enabled, it might be stripping the silentSignIn() method. Add this rule to your proguard-rules.pro file to keep the method intact:

  -keep class com.google.android.gms.auth.api.signin.GoogleSignInClient {
      public void silentSignIn(...);
  }
  

  You can also add the full set of Google Sign-In obfuscation rules to avoid other related issues.

Give these steps a try one by one—usually the dependency version or incorrect client instance is the culprit.

内容的提问来源于stack exchange，提问作者ndemoh