Android 上的 auth.getIdTokenClient() 等价于什么？

What's the equivalent of auth.getIdTokenClient() on Android?

我需要从 GCP 函数查询令牌，为此，我想执行 js 函数 GoogleAuth<JSONClient>.getIdTokenClient(targetAudience) 所做的操作，但在 Android.

现在我正在使用此代码生成授权令牌：

GoogleCredentials
                .fromStream(
                    app.assets.open("my_config_file.json")
                )
                .createScoped(
                    listOf(
                        "https://www.googleapis.com/auth/cloud-platform"
                    )
                )

但是生成的令牌是 ya29.c.，通过 getIdToken 我得到了一个有效的令牌。

如何在我的 Android 应用程序上获取有效令牌作为 getIdToken？

对于基于 Java 的应用程序，您有 google-auth-library-java. Looking in the docs for this library you have the IdTokenCredentials.Builder and IdTokenCredentials 类。

您还有一个示例用例：

 String credPath = "/path/to/svc_account.json";
 String targetAudience = "https://example.com";
 // For Application Default Credentials (as ServiceAccountCredentials)
 // export GOOGLE_APPLICATION_CREDENTIALS=/path/to/svc.json
 GoogleCredentials adcCreds = GoogleCredentials.getApplicationDefault();
 if (!adcCreds instanceof IdTokenProvider) {
   // handle error message
 }

 IdTokenCredentials tokenCredential = IdTokenCredentials.newBuilder()
     .setIdTokenProvider(adcCreds)
     .setTargetAudience(targetAudience).build();

 // Use the IdTokenCredential in an authorized transport
 GenericUrl genericUrl = new GenericUrl("https://example.com");
 HttpCredentialsAdapter adapter = new HttpCredentialsAdapter(tokenCredential);
 HttpTransport transport = new NetHttpTransport();
 HttpRequest request = transport.createRequestFactory(adapter).buildGetRequest(genericUrl);
 HttpResponse response = request.execute();

 // Print the token, expiration and the audience
 System.out.println(tokenCredential.getIdToken().getTokenValue());
 System.out.println(tokenCredential.getIdToken().getJsonWebSignature().getPayload().getAudienceAsList());
 System.out.println(tokenCredential.getIdToken().getJsonWebSignature().getPayload().getExpirationTimeSeconds());
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