如何在GoogleSignIn signInSilally中捕获错误？

Question

我有下面的代码，我用它来让一个用户静默登录

try {
    result = await GoogleSignIn().signInSilently().catchError((x) {
      print(x);
    });
  } catch (e) {
    print(e);
  }

如果用户无法静默登录，将会导致错误。

PlatformException (PlatformException(sign_in_required, com.google.android.gms.common.api.ApiException: 4: 4: , null))

我遇到的问题是，我似乎无法抓住例外。捕获错误或捕获块正在被击中。如何捕获此错误？

Answer 1

如果您使用< code > suppress errors = false ，则< code>catchError块实际上会被命中< br >尝试以下代码，并查看它在您的控制台上显示的内容。

result = await GoogleSignIn().signInSilently(suppressErrors: false).
  catchError((x) {
    print("inside catchError");
  });

Answer 2

这可能会有所帮助。

清单:

< li >未注册阿沙指纹。 < li >确保设置我的“支持电子邮件”。 < li >启用Google登录方法。

Answer 3

在您的方法中执行以下操作

try {
    result = await GoogleSignIn().signInSilently(suppressErrors: false).catchError((x) {
      print(x);
    });
  } catch (e) {
    print(e);
  }

默认情况下抑制错误=true抑制要捕获的错误消息。

看源代码

SignInSilenly方法用于抑制错误消息，从而不会引发您想要捕获的异常。

从该方法的文档中：

  /// When [suppressErrors] is set to `false` and an error occurred during sign in
  /// returned Future completes with [PlatformException] whose `code` can be
  /// either [kSignInRequiredError] (when there is no authenticated user) or
  /// [kSignInFailedError] (when an unknown error occurred).

完整方法

 /// Attempts to sign in a previously authenticated user without interaction.
  ///
  /// Returned Future resolves to an instance of [GoogleSignInAccount] for a
  /// successful sign in or `null` if there is no previously authenticated user.
  /// Use [signIn] method to trigger interactive sign in process.
  ///
  /// Authentication process is triggered only if there is no currently signed in
  /// user (that is when `currentUser == null`), otherwise this method returns
  /// a Future which resolves to the same user instance.
  ///
  /// Re-authentication can be triggered only after [signOut] or [disconnect].
  ///
  /// When [suppressErrors] is set to `false` and an error occurred during sign in
  /// returned Future completes with [PlatformException] whose `code` can be
  /// either [kSignInRequiredError] (when there is no authenticated user) or
  /// [kSignInFailedError] (when an unknown error occurred).
  Future<GoogleSignInAccount> signInSilently({bool suppressErrors = true}) {
    final Future<GoogleSignInAccount> result = _addMethodCall('signInSilently');
    if (suppressErrors) {
      return result.catchError((dynamic _) => null);
    }
    return result;
  }

参考文献

• 谷歌登录插件存储库
• 方法源代码起始行 283