如何捕获 Firebase Auth 特定的异常

Question

使用 Firebase，我如何捕获特定异常并优雅地告诉用户？例如：

FirebaseAuthInvalidCredentialsException：电子邮件地址格式错误。

我正在使用下面的代码使用电子邮件和密码注册用户，但我在 java 方面并不那么先进。

 mAuth.createUserWithEmailAndPassword(email, pwd)
    .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {

    @Override
    public void onComplete(@NonNull Task<AuthResult> task) {
        if (!task.isSuccessful()) {
            //H.toast(c, task.getException().getMessage());
            Log.e("Signup Error", "onCancelled", task.getException());
        } else {
            FirebaseUser user = mAuth.getCurrentUser();
            String uid = user.getUid();
        }
    }
});

原文由 Relm 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

您可以在 try 块中抛出 task.getException 返回的异常，并捕获您正在使用的方法可能抛出的每种类型的异常。

这是来自 OnCompleteListener 的示例，用于 createUserWithEmailAndPassword 方法。

 if(!task.isSuccessful()) {
    try {
        throw task.getException();
    } catch(FirebaseAuthWeakPasswordException e) {
        mTxtPassword.setError(getString(R.string.error_weak_password));
        mTxtPassword.requestFocus();
    } catch(FirebaseAuthInvalidCredentialsException e) {
        mTxtEmail.setError(getString(R.string.error_invalid_email));
        mTxtEmail.requestFocus();
    } catch(FirebaseAuthUserCollisionException e) {
        mTxtEmail.setError(getString(R.string.error_user_exists));
        mTxtEmail.requestFocus();
    } catch(Exception e) {
        Log.e(TAG, e.getMessage());
    }
}

原文由 Steve Guidetti 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

除了@pdegand59 的回答，我在 Firebase 库中发现了一些错误代码并在 Android 上进行了测试（返回的错误代码）。希望这会有所帮助， 问候。

  ("ERROR_INVALID_CUSTOM_TOKEN", "The custom token format is incorrect. Please check the documentation."));
 ("ERROR_CUSTOM_TOKEN_MISMATCH", "The custom token corresponds to a different audience."));
 ("ERROR_INVALID_CREDENTIAL", "The supplied auth credential is malformed or has expired."));
 ("ERROR_INVALID_EMAIL", "The email address is badly formatted."));
 ("ERROR_WRONG_PASSWORD", "The password is invalid or the user does not have a password."));
 ("ERROR_USER_MISMATCH", "The supplied credentials do not correspond to the previously signed in user."));
 ("ERROR_REQUIRES_RECENT_LOGIN", "This operation is sensitive and requires recent authentication. Log in again before retrying this request."));
 ("ERROR_ACCOUNT_EXISTS_WITH_DIFFERENT_CREDENTIAL", "An account already exists with the same email address but different sign-in credentials. Sign in using a provider associated with this email address."));
 ("ERROR_EMAIL_ALREADY_IN_USE", "The email address is already in use by another account."));
 ("ERROR_CREDENTIAL_ALREADY_IN_USE", "This credential is already associated with a different user account."));
 ("ERROR_USER_DISABLED", "The user account has been disabled by an administrator."));
 ("ERROR_USER_TOKEN_EXPIRED", "The user\'s credential is no longer valid. The user must sign in again."));
 ("ERROR_USER_NOT_FOUND", "There is no user record corresponding to this identifier. The user may have been deleted."));
 ("ERROR_INVALID_USER_TOKEN", "The user\'s credential is no longer valid. The user must sign in again."));
 ("ERROR_OPERATION_NOT_ALLOWED", "This operation is not allowed. You must enable this service in the console."));
 ("ERROR_WEAK_PASSWORD", "The given password is invalid."));
 ("ERROR_MISSING_EMAIL", "An email address must be provided.";

原文由 kingspeech 发布，翻译遵循 CC BY-SA 4.0 许可协议