如何捕获Firebase Auth特定的异常

时间：2016-06-16 12:41:57

标签： java android exception firebase firebase-authentication

使用Firebase，如何捕获特定异常并优雅告诉用户？例如：

  

FirebaseAuthInvalidCredentialsException：电子邮件地址很糟糕   格式化。

我正在使用下面的代码使用电子邮件和密码注册用户，但我不是那么高级的java。 

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();
        }
    }    
});

18 个答案:

答案 0 :(得分：73)

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

以下是OnCompleteListener方法的createUserWithEmailAndPassword示例。

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());
    }
}

答案 1 :(得分：27)

除了@ pdegand59回答，我在Firebase库中发现了一些错误代码并在Android上测试（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."));

答案 2 :(得分：8)

如果这是格式错误的电子邮件的错误代码，您应该使用((FirebaseAuthException)task.getException()).getErrorCode()来获取错误类型并正常失败。

很遗憾，我找不到Firebase使用的错误代码列表。 触发异常一次，请相应地记下错误代码和代码。

答案 3 :(得分：8)

与firebase身份验证相关的许多例外情况。 除了@kingspeech

您应该使用((FirebaseAuthException)task.getException()).getErrorCode()来获取类型的错误，然后在switch中执行此操作：

private void loginUser(String email, String password) {

        mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {

            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {

                if (task.isSuccessful()) {

                    startActivity(new Intent(MainActivity.this, Main2Activity.class));

                } else {

                    String errorCode = ((FirebaseAuthException) task.getException()).getErrorCode();

                    switch (errorCode) {

                        case "ERROR_INVALID_CUSTOM_TOKEN":
                            Toast.makeText(MainActivity.this, "The custom token format is incorrect. Please check the documentation.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_CUSTOM_TOKEN_MISMATCH":
                            Toast.makeText(MainActivity.this, "The custom token corresponds to a different audience.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_INVALID_CREDENTIAL":
                            Toast.makeText(MainActivity.this, "The supplied auth credential is malformed or has expired.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_INVALID_EMAIL":
                            Toast.makeText(MainActivity.this, "The email address is badly formatted.", Toast.LENGTH_LONG).show();
                            etEmail.setError("The email address is badly formatted.");
                            etEmail.requestFocus();
                            break;

                        case "ERROR_WRONG_PASSWORD":
                            Toast.makeText(MainActivity.this, "The password is invalid or the user does not have a password.", Toast.LENGTH_LONG).show();
                            etPassword.setError("password is incorrect ");
                            etPassword.requestFocus();
                            etPassword.setText("");
                            break;

                        case "ERROR_USER_MISMATCH":
                            Toast.makeText(MainActivity.this, "The supplied credentials do not correspond to the previously signed in user.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_REQUIRES_RECENT_LOGIN":
                            Toast.makeText(MainActivity.this, "This operation is sensitive and requires recent authentication. Log in again before retrying this request.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_ACCOUNT_EXISTS_WITH_DIFFERENT_CREDENTIAL":
                            Toast.makeText(MainActivity.this, "An account already exists with the same email address but different sign-in credentials. Sign in using a provider associated with this email address.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_EMAIL_ALREADY_IN_USE":
                            Toast.makeText(MainActivity.this, "The email address is already in use by another account.   ", Toast.LENGTH_LONG).show();
                            etEmail.setError("The email address is already in use by another account.");
                            etEmail.requestFocus();
                            break;

                        case "ERROR_CREDENTIAL_ALREADY_IN_USE":
                            Toast.makeText(MainActivity.this, "This credential is already associated with a different user account.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_USER_DISABLED":
                            Toast.makeText(MainActivity.this, "The user account has been disabled by an administrator.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_USER_TOKEN_EXPIRED":
                            Toast.makeText(MainActivity.this, "The user\\'s credential is no longer valid. The user must sign in again.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_USER_NOT_FOUND":
                            Toast.makeText(MainActivity.this, "There is no user record corresponding to this identifier. The user may have been deleted.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_INVALID_USER_TOKEN":
                            Toast.makeText(MainActivity.this, "The user\\'s credential is no longer valid. The user must sign in again.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_OPERATION_NOT_ALLOWED":
                            Toast.makeText(MainActivity.this, "This operation is not allowed. You must enable this service in the console.", Toast.LENGTH_LONG).show();
                            break;

                        case "ERROR_WEAK_PASSWORD":
                            Toast.makeText(MainActivity.this, "The given password is invalid.", Toast.LENGTH_LONG).show();
                            etPassword.setError("The password is invalid it must 6 characters at least");
                            etPassword.requestFocus();
                            break;

                    }
                }
            }
        });
    }

答案 4 :(得分：7)

如果您只是想向用户显示消息，则此方法有效。简单而优雅：

if (!task.isSuccessful()) {
    Log.w(TAG, "signInWithEmail:failed", task.getException());
    Toast.makeText(LoginActivity.this, "User Authentication Failed: " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
}

似乎.getMessage（）方法已经为我们将异常转换为可用的格式，我们所要做的就是向用户显示某个地方。

（这是我的第一个评论，请提出建设性的批评）

答案 5 :(得分：2)

如果要将上游消息从用户发送到云，请实施firebase回调函数onMessageSent和onSendError以检查上游消息的状态。在错误情况下，onSendError会返回带有错误代码的 SendException 。

例如，如果客户端在达到20条消息限制后尝试发送更多消息，则返回 SendException＃ERROR_TOO_MANY_MESSAGES。

答案 6 :(得分：2)

您可以使用steve-guidetti或pdegand59方法。我使用了steve-guidetti的方法（缺少两个例外）

对于所有可能的例外情况，请参阅以下参考。

这里有详细记载。

https://firebase.google.com/docs/reference/js/firebase.auth.Auth

搜索“createUserWithEmailAndPassword”并找到

  

错误代码

     

AUTH /电子邮件已经在使用

Thrown if there already exists an account with the given email address.
  

AUTH /无效的电子邮件

Thrown if the email address is not valid.
  

AUTH /操作不被允许

Thrown if email/password accounts are not enabled. Enable email/password accounts in the Firebase Console, under the Auth tab.
  

AUTH /弱密码

Thrown if the password is not strong enough.

对于所有五个例外：点击此处

https://firebase.google.com/docs/reference/android/com/google/firebase/auth/FirebaseAuthException

在这里您可以找到5种不同类型的AuthException。 4已知直接子类和1个间接子类

您可以使用steve-guidetti或pdegand59方法。

答案 7 :(得分：2)

我尝试了另一种解决方案，但并不喜欢它们。

这个怎么样：

if (!task.isSuccessful()) {

    Exception exc = task.getException();

    if (exc.getMessage().contains("The email address is badly formatted.")) {
        etUser.setError(getString(R.string.error_wrong_email));
        etUser.requestFocus();
    }
    else
    if (exc.getMessage().contains("There is no user record corresponding to this identifier. The user may have been deleted.")) {
        etUser.setError(getString(R.string.error_user_not_exist));
        etUser.requestFocus();
    }
    else
    if (exc.getMessage().contains("The password is invalid or the user does not have a password")) {
        etPass.setError(getString(R.string.error_wrong_password));
        etPass.requestFocus();
    }


    Log.w(TAG, "signInWithEmail:failed", task.getException());


    Toast.makeText(AuthActivity.this, R.string.auth_failed,
            Toast.LENGTH_SHORT).show();
}

答案 8 :(得分：1)

<强> LOGIN_EXCEPTIONS

FirebaseAuthException - 与Firebase身份验证相关的常规异常。请查看错误代码和消息以获取更多详细信息。

ERROR_USER_DISABLE D如果用户已被禁用（例如，在Firebase控制台中）

ERROR_USER_NOT_FOUND如果用户已被删除（例如，在Firebase控制台中，或在此应用的其他实例中）

ERROR_USER_TOKEN_EXPIRED如果用户的令牌已在后端被撤销。如果用户的凭据在另一个设备中更改（例如，在密码更改事件中），则会自动发生此情况。

ERROR_INVALID_USER_TOKEN如果用户的令牌格式错误。在正常情况下这不应该发生。

mAuth.signInWithEmailAndPassword(login, pass)
  .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {
          if(task.isSuccessful())
            {

            }else if (task.getException() instanceof FirebaseAuthInvalidUserException) {

            }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_USER_DISABLED"))
            {

           }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_USER_NOT_FOUND "))
          {

          }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_USER_TOKEN_EXPIRED "))
         {

         }else if(((FirebaseAuthException) task.getException()).getErrorCode().equals("ERROR_INVALID_USER_TOKEN "))
         {
         }
 }
});

<强> REGISTER_EXCEPTIONS 

FirebaseAuthEmailException

表示尝试通过Firebase Auth发送电子邮件的结果的异常（例如密码重置电子邮件）

FirebaseAuthInvalidCredentialsException - 当传递给方法的一个或多个凭据无法识别和/或验证该操作的用户主题时，抛出此异常。检查错误代码和消息以找出具体原因。

FirebaseAuthWeakPasswordException - 使用弱密码（少于6个字符）创建新帐户或更新现有帐户密码时抛出。使用getReason（）来获取一条消息，其中包含验证失败的原因，您可以向用户显示该消息。

答案 9 :(得分：1)

KOTLIN解决方案 

 fun signInWithEmail(email: String, passKey: String) {
    FirebaseAuth.getInstance().signInWithEmailAndPassword(email, passKey).addOnSuccessListener {
        it.user?.let {
            authResultOperation.postValue(AuthResultOperation.OnSuccessSignIn)
        }
    }.addOnFailureListener {
        val errorCode = (it as FirebaseAuthException).errorCode
        val errorMessage = authErrors[errorCode] ?: R.string.error_login_default_error
        Toast.makeText(context, context.getString(errorMessage),Toast.LENGTH_LONG).show()
    }
}

说明：基本上，这只是一张将firebase错误代码与自定义字符串资源匹配的地图。

val authErrors = mapOf("ERROR_INVALID_CUSTOM_TOKEN" to R.string.error_login_custom_token,
        "ERROR_CUSTOM_TOKEN_MISMATCH" to R.string.error_login_custom_token_mismatch,
        "ERROR_INVALID_CREDENTIAL" to R.string.error_login_credential_malformed_or_expired,
        "ERROR_INVALID_EMAIL" to R.string.error_login_invalid_email,
        "ERROR_WRONG_PASSWORD" to R.string.error_login_wrong_password,
        "ERROR_USER_MISMATCH" to R.string.error_login_user_mismatch,
        "ERROR_REQUIRES_RECENT_LOGIN" to R.string.error_login_requires_recent_login,
        "ERROR_ACCOUNT_EXISTS_WITH_DIFFERENT_CREDENTIAL" to R.string.error_login_accounts_exits_with_different_credential,
        "ERROR_EMAIL_ALREADY_IN_USE" to  R.string.error_login_email_already_in_use,
        "ERROR_CREDENTIAL_ALREADY_IN_USE" to R.string.error_login_credential_already_in_use,
        "ERROR_USER_DISABLED" to R.string.error_login_user_disabled,
        "ERROR_USER_TOKEN_EXPIRED" to R.string.error_login_user_token_expired,
        "ERROR_USER_NOT_FOUND" to R.string.error_login_user_not_found,
        "ERROR_INVALID_USER_TOKEN" to R.string.error_login_invalid_user_token,
        "ERROR_OPERATION_NOT_ALLOWED" to R.string.error_login_operation_not_allowed,
        "ERROR_WEAK_PASSWORD" to R.string.error_login_password_is_weak)

字符串资源（根据您的要求随意更改）

  <resources>
    <string name="error_login_custom_token">The custom token format is incorrect. Please check the documentation.</string>
    <string name="error_login_custom_token_mismatch">The custom token corresponds to a different audience.</string>
    <string name="error_login_credential_malformed_or_expired">The supplied auth credential is malformed or has expired.</string>
    <string name="error_login_invalid_email">The email address is badly formatted.</string>
    <string name="error_login_wrong_password">The password is invalid or the user does not have a password.</string>
    <string name="error_login_user_mismatch">The supplied credentials do not correspond to the previously signed in user.</string>
    <string name="error_login_requires_recent_login">This operation is sensitive and requires recent authentication. Log in again before retrying this request.</string>
    <string name="error_login_accounts_exits_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.</string>
    <string name="error_login_email_already_in_use">The email address is already in use by another account.</string>
    <string name="error_login_credential_already_in_use">This credential is already associated with a different user account.</string>
    <string name="error_login_user_disabled">The user account has been disabled by an administrator.</string>
    <string name="error_login_user_not_found">There is no user record corresponding to this identifier. The user may have been deleted.</string>
    <string name="error_login_operation_not_allowed">This operation is not allowed. You must enable this service in the console.</string>
    <string name="error_login_password_is_weak">The given password is invalid.</string>
    <string name="error_login_user_token_expired">The user\'s credential is no longer valid. The user must sign in again</string>
    <string name="error_login_invalid_user_token">The user\'s credential is no longer valid. The user must sign in again.</string>
</resources>

答案 10 :(得分：1)

我认为默认消息足够提供信息。因此，我使用它而不是任何自定义消息，对我来说效果很好。

if (!task.isSuccessful()) 
{ 
    // there was an error
    String yourString = task.getException().toString();
    String target = "Exception:";
    String error = yourString.substring(yourString.indexOf(target) + target.length() + 1, yourString.length());
    Toast.makeText(LoginScreen.this, "Error: "+error, Toast.LENGTH_LONG).show();
}

p.s。这是我对堆栈溢出的第一个答案。让我知道是否有帮助。

答案 11 :(得分：0)

过去我们使用getErrorCode（）来获取错误类型并正常失败。使用较新版本的api，不推荐使用getErrorCode（）。我们应该使用response.getError（）。getErrorCode（）来代替

libmysql.dll

所以，例如。

com.firebase.ui.auth.IdpResponse
@Deprecated 
public int getErrorCode()
Get the error code for a failed sign in

Deprecated use getError() instead

答案 12 :(得分：0)

尝试以下方法：

if (task.isSuccessful()) {
    //Toast.makeText(getContext(),"Registration successful", Toast.LENGTH_SHORT).show();
    try {
        Toast.makeText(getContext(),"Registration successful", Toast.LENGTH_SHORT).show();
        throw task.getException();
    }
    // if user enters wrong email.
    catch (FirebaseAuthWeakPasswordException weakPassword) {
        Log.d("Registration Error", "onComplete: weak_password");

        // TODO: take your actions!
    }
    // if user enters wrong password.
    catch (FirebaseAuthInvalidCredentialsException malformedEmail) {
        Log.d("Registration Error", "onComplete: malformed_email");

        // TODO: Take your action
    }
    catch (FirebaseAuthUserCollisionException existEmail) {
        Log.d("Registration Error", "onComplete: exist_email");

        // TODO: Take your action
    }
    catch (Exception e) {
        Log.d("Registration Error", "onComplete: " + e.getMessage());
    }
} else {
    //Toast.makeText(getContext(), "ERROR, Please try again.", Toast.LENGTH_SHORT).show();
    Toast.makeText(getContext(), task.getException().getMessage(), Toast.LENGTH_SHORT).show();
}

答案 13 :(得分：0)

这是我在Kotlin中使用的方法

    fun handleErrorsFirebaseAuth(err:FirebaseAuthException): String {

        when (err.errorCode) {


            "ERROR_INVALID_EMAIL" -> return "Introduce un email válido"

            "ERROR_EMAIL_ALREADY_IN_USE" -> return "Este email ya está en uso , usa otra cuenta o recupera la contraseña"

            "ERROR_WEAK_PASSWORD" -> return "La contraseña tiene que ser de mínimo 6 carácteres"

            "ERROR_WRONG_PASSWORD" -> return "La contraseña es incorrecta"

            "ERROR_USER_DISABLED" -> return "Usuario deshabilitado, has infringido alguna norma"

            "ERROR_USER_NOT_FOUND" -> return "No encontramos su cuenta. ¿El email es correcto? , contacte con nosotros mediante instagram @gobarberco"



            else -> {

                return "Se ha producido un error"
            }

        }

    }

使用：

val messageError =  handleErrorsFirebaseAuth(task.exception as FirebaseAuthException)

答案 14 :(得分：0)

要捕获firebase异常很简单，您应该在添加.addOnFailureListener之后添加.addOnCompleteListener：

 private void login_user(String email, String password) {

    mAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {
           if(task.isSuccessful()){
               Intent intent = new Intent(getApplicationContext(),MainActivity.class);
               startActivity(intent);
               finish();
           }if(!task.isSuccessful()){


                // To know The Excepton 
                //Toast.makeText(LoginActivity.this, ""+task.getException(), Toast.LENGTH_LONG).show();

           }
        }
    }).addOnFailureListener(new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception e) {
            if( e instanceof FirebaseAuthInvalidUserException){
                Toast.makeText(LoginActivity.this, "This User Not Found , Create A New Account", Toast.LENGTH_SHORT).show();
            }
            if( e instanceof FirebaseAuthInvalidCredentialsException){
                Toast.makeText(LoginActivity.this, "The Password Is Invalid, Please Try Valid Password", Toast.LENGTH_SHORT).show();
            }
            if(e instanceof FirebaseNetworkException){
                Toast.makeText(LoginActivity.this, "Please Check Your Connection", Toast.LENGTH_SHORT).show();
            }
        }
    });

答案 15 :(得分：0)

    try {
            throw task.getException();
        } catch(FirebaseAuthException e) {
           switch (e.getErrorCode()){
                        case "ERROR_WEAK_PASSWORD":
                      Toast.makeText(this, "The given password is invalid.", Toast.LENGTH_SHORT).show();
                             break;
                      //and other
                    }
        }

错误代码：https://stackoverflow.com/a/38244409/2425851

答案 16 :(得分：0)

有太多 Firebase 身份验证异常需要处理，我不确定处理所有这些异常是否是一件好事，因为要添加大量代码（正如您在其他答案中所见）。

我刚刚在 FirebaseTooManyRequestsException 返回 false 后得到一个 Task<AuthResult.isSuccessful()：

    firebaseAuth.signInWithEmailAndPassword(email, password)
        .addOnCompleteListener {
            if (it.isSuccessful) {
                [...]
            } else {
                [FirebaseTooManyRequestsException and others that can be returned here]
            }
        }

com.google.firebase.FirebaseTooManyRequestsException: We have blocked all requests from this device due to unusual activity. Try again later. [ Access to this account has been temporarily disabled due to many failed login attempts. You can immediately restore it by resetting your password or you can try again later. ]

FirebaseTooManyRequestsException

因此，如果您想捕获所有这些或至少对您的逻辑更重要的那些，我希望在此列表中添加另一个 FirebaseAuth 例外对您有所帮助。

答案 17 :(得分：-1)

您可以使用此：

mAuth.getCurrentUser().linkWithCredential(authCredential)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        Log.d(TAG, "linkWithCredential:success");
                    } else {
                        Log.w(TAG, "linkWithCredential:failure", task.getException());
                        Toast.makeText(getApplicationContext(), "Authentication failed. " + task.getException().toString, Toast.LENGTH_SHORT).show();

                    }

                    // ...
                }
            });
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