Develop Reference

check existing and none existing account in firebase auth / Android Java [duplicate]

Using Firebase, how do I catch a specific exception and tell the user gracefully about it? E.g :
FirebaseAuthInvalidCredentialsException: The email address is badly
formatted.
I'm using the code below to signup the user using email and password, but I'm not that advanced in 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();
}
}
});

You can throw the Exception returned by task.getException inside a try block and catch each type of Exception that may be thrown by the method you are using.
Here is an example from the OnCompleteListener for the createUserWithEmailAndPassword method.
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());
}
}

In addition to #pdegand59 answer, I found some error code in Firebase library and test on Android (the returned error code). Hope this helps, Regards.
("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.";

There are a number of exceptions associated with firebase auth.
In addition to #kingspeech
You should use ((FirebaseAuthException)task.getException()).getErrorCode() to get the type of error and then handle it in switch like this :
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;
}
}
}
});
}

You should use ((FirebaseAuthException)task.getException()).getErrorCode() to get the type of error and fail gracefully if this is the error code for a bad formatted email.
Unfortunately, I couldn't find the list of error codes used by Firebase.
Trigger the exception once, note the error code and code accordingly.

Solution using Kotlin
fun signInWithEmail(email: String, passKey: String) {
FirebaseAuth.getInstance().signInWithEmailAndPassword(email, passKey).addOnSuccessListener {
it.user?.let {
authResultOperation.postValue(AuthResultOperation.OnSuccessSignIn)
}
}.addOnFailureListener {
val errorCode = (it.exception as FirebaseAuthException).errorCode
val errorMessage = authErrors[errorCode] ?: R.string.error_login_default_error
Toast.makeText(context, context.getString(errorMessage),Toast.LENGTH_LONG).show()
}
}
Explanation: Basically It's just a map that match firebase error codes with a custom string resource.
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)
String resources (Feel free to change it according to your requirements)
<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>

If you simply want display a message to the user this works. Simple and Elegant:
if (!task.isSuccessful()) {
Log.w(TAG, "signInWithEmail:failed", task.getException());
Toast.makeText(LoginActivity.this, "User Authentication Failed: " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
}
It appears that the .getMessage() method converts the exception to a usable format for us already and all we have to do is display that somewhere to the user.
(This is my first comment, constructive criticism please)

You can use either steve-guidetti or pdegand59 method. I used steve-guidetti's method(Two exceptions are missing)
For all possible exception please find below ref.
It is well documented here.
https://firebase.google.com/docs/reference/js/firebase.auth.Auth
Search for "createUserWithEmailAndPassword" and find the
Error Codes
auth/email-already-in-use
Thrown if there already exists an account with the given email address.
auth/invalid-email
Thrown if the email address is not valid.
auth/operation-not-allowed
Thrown if email/password accounts are not enabled. Enable email/password accounts in the Firebase Console, under the Auth tab.
auth/weak-password
Thrown if the password is not strong enough.
For all five exceptions: Check here
https://firebase.google.com/docs/reference/android/com/google/firebase/auth/FirebaseAuthException
Here you can find 5 different types of AuthException. 4 Known Direct subclass and 1 indirect subclass
You can use either steve-guidetti or pdegand59 method.

If you are sending upstream messages from user to cloud, implement firebase callback functions onMessageSent and onSendError to check the status of upstream messages. In error cases, onSendError returns a SendException with an error code.
For example, if the client attempts to send more messages after the 20-message limit is reached, it returns SendException#ERROR_TOO_MANY_MESSAGES.

To catch a firebase Exception is easy, you should add .addOnFailureListener after you add .addOnCompleteListener like this:
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();
}
}
});

I tried another solutions but didn't like them.
What about this:
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();
}

LOGIN_EXCEPTIONS
FirebaseAuthException - Generic exception related to Firebase Authentication. Check the error code and message for more details.
ERROR_USER_DISABLED if the user has been disabled (for example, in the Firebase console)
ERROR_USER_NOT_FOUND if the user has been deleted (for example, in the Firebase console, or in another instance of this app)
ERROR_USER_TOKEN_EXPIRED if the user's token has been revoked in the backend. This happens automatically if the user's credentials change in another device (for example, on a password change event).
ERROR_INVALID_USER_TOKEN if the user's token is malformed. This should not happen under normal circumstances.
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 "))
{
}
}
});
REGISTER_EXCEPTIONS
FirebaseAuthEmailException
Represents the exception which is a result of an attempt to send an email via Firebase Auth (e.g. a password reset email)
FirebaseAuthInvalidCredentialsException - Thrown when one or more of the credentials passed to a method fail to identify and/or authenticate the user subject of that operation. Inspect the error code and message to find out the specific cause.
FirebaseAuthWeakPasswordException - Thrown when using a weak password (less than 6 chars) to create a new account or to update an existing account's password. Use getReason() to get a message with the reason the validation failed that you can display to your users.

According to me the default message is informative enough. So I used it rather than any custom message and it worked pretty well for me.
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. this is my first answer on stack overflow. Do let me know if it was helpful.

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
}
}
error codes: https://stackoverflow.com/a/38244409/2425851

In the past we used the getErrorCode() to get the type of error and fail gracefully. With the newer versions of the api, getErrorCode() is deprecated. We should use response.getError().getErrorCode() instead
com.firebase.ui.auth.IdpResponse
#Deprecated
public int getErrorCode()
Get the error code for a failed sign in
Deprecated use getError() instead
So for e.g.
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RC_SIGN_IN) {
IdpResponse response = IdpResponse.fromResultIntent(data);
// Successfully signed in
if (resultCode == RESULT_OK) {
//dbHandler = DBMS.getInstance(this);
FirebaseAuth auth = FirebaseAuth.getInstance();
FirebaseUser user = auth.getCurrentUser();
FirebaseUserMetadata metadata = auth.getCurrentUser().getMetadata();
// initialize profile first
if (metadata.getCreationTimestamp() == metadata.getLastSignInTimestamp()) {
//start main activity after profile setup
startActivity(new Intent(this, MainActivity.class));
return;
} else {
// This is an existing user
// show them a welcome back screen.
startActivity(new Intent(this, MainActivity.class));
return;
}
} else {
// Sign in failed
// check response for error code
if (response == null) {
// User pressed back button
showSnackbar(R.string.sign_in_cancelled);
return;
}
if (response.getError().getErrorCode() == ErrorCodes.NO_NETWORK) {
showSnackbar(R.string.no_internet_connection);
return;
}
if (response.getError().getErrorCode() == ErrorCodes.UNKNOWN_ERROR) {
showSnackbar(R.string.unknown_error);
return;
}
}
showSnackbar(R.string.unknown_sign_in_response);
}
}

Try the following:
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();
}

There are too many Firebase Authentication exceptions to handle, and I'm not sure if handling all of them is a good thing due to a large amount of code to add (as you can see from other answers).
I just got a FirebaseTooManyRequestsException after Task<AuthResult.isSuccessful() returned false:
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. ]
So, if you want to catch all of them or at least the ones that are more important to your logic, I hope that bringing another FirebaseAuth exception to this list helps you.

Here's a Kotlin parser that I use. it's adapted from FirebaseUI-Android
/**
* List of all possible results of [FirebaseAuthException.getErrorCode] and their meanings.
* TODO you can make description parameter private if you don't use it outside of this class
*/
enum class FirebaseAuthErrorParser(val description: String) {
ERROR_INVALID_CUSTOM_TOKEN("The custom token format is incorrect. Please check the documentation."),
ERROR_CUSTOM_TOKEN_MISMATCH("Invalid configuration. Ensure your app's SHA1 is correct in the Firebase console."),
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 has expired. 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. Enable the sign-in method in the Authentication tab of the Firebase console"),
ERROR_TOO_MANY_REQUESTS("We have blocked all requests from this device due to unusual activity. Try again later."),
ERROR_WEAK_PASSWORD("The given password is too weak, please choose a stronger password."),
ERROR_EXPIRED_ACTION_CODE("The out of band code has expired."),
ERROR_INVALID_ACTION_CODE("The out of band code is invalid. This can happen if the code is malformed, expired, or has already been used."),
ERROR_INVALID_MESSAGE_PAYLOAD("The email template corresponding to this action contains invalid characters in its message. Please fix by going to the Auth email templates section in the Firebase Console."),
ERROR_INVALID_RECIPIENT_EMAIL("The email corresponding to this action failed to send as the provided recipient email address is invalid."),
ERROR_INVALID_SENDER("The email template corresponding to this action contains an invalid sender email or name. Please fix by going to the Auth email templates section in the Firebase Console."),
ERROR_MISSING_EMAIL("An email address must be provided."),
ERROR_MISSING_PASSWORD("A password must be provided."),
ERROR_MISSING_PHONE_NUMBER("To send verification codes, provide a phone number for the recipient."),
ERROR_INVALID_PHONE_NUMBER("The format of the phone number provided is incorrect. Please enter the phone number in a format that can be parsed into E.164 format. E.164 phone numbers are written in the format [+][country code][subscriber number including area code]."),
ERROR_MISSING_VERIFICATION_CODE("The phone auth credential was created with an empty sms verification code"),
ERROR_INVALID_VERIFICATION_CODE("The sms verification code used to create the phone auth credential is invalid. Please resend the verification code sms and be sure use the verification code provided by the user."),
ERROR_MISSING_VERIFICATION_ID("The phone auth credential was created with an empty verification ID"),
ERROR_INVALID_VERIFICATION_ID("The verification ID used to create the phone auth credential is invalid."),
ERROR_RETRY_PHONE_AUTH("An error occurred during authentication using the PhoneAuthCredential. Please retry authentication."),
ERROR_SESSION_EXPIRED("The sms code has expired. Please re-send the verification code to try again."),
ERROR_QUOTA_EXCEEDED("The sms quota for this project has been exceeded."),
ERROR_APP_NOT_AUTHORIZED("This app is not authorized to use Firebase Authentication. Please verify that the correct package name and SHA-1 are configured in the Firebase Console."),
ERROR_API_NOT_AVAILABLE("The API that you are calling is not available on devices without Google Play Services."),
ERROR_WEB_CONTEXT_CANCELED("The web operation was canceled by the user"),
ERROR_UNKNOWN("An unknown error occurred.");
companion object {
/**
* Get an [FirebaseAuthError.description] from an exception,
* returning [FirebaseAuthError.ERROR_UNKNOWN] as a default.
*/
fun fromException(ex: FirebaseAuthException): String {
return try {
valueOf(ex.errorCode).description
} catch (e: IllegalArgumentException) {
Log.e(TAG, e)
ERROR_UNKNOWN.description
}
}
}
}
This is how you use it:
val ErrorMsg = FirebaseAuthErrorParser.fromException(firebaseAuthEx)

you can use this:
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();
}
// ...
}
});

Using Firebase return an image that is linked to a user account

I am currently working on an app using android studio and currently have a working login using Firebase user authentication. However, I am trying to have an image appear on the screen when the user logs after using this authentication. I want this image to be linked to that specific user. Is this possible?

You can set a photo url on a user's firebase profile with the following code:
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
UserProfileChangeRequest profileUpdates = new UserProfileChangeRequest.Builder()
.setDisplayName("Jane Q. User")
.setPhotoUri(Uri.parse("https://example.com/jane-q-user/profile.jpg"))
.build();
user.updateProfile(profileUpdates)
.addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()) {
Log.d(TAG, "User profile updated.");
}
}
});
You would then retrieve the user's profile information (including their photo URL) like so:
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null) {
// Name, email address, and profile photo Url
String name = user.getDisplayName();
String email = user.getEmail();
Uri photoUrl = user.getPhotoUrl();
// Check if user's email is verified
boolean emailVerified = user.isEmailVerified();
// The user's ID, unique to the Firebase project. Do NOT use this value to
// authenticate with your backend server, if you have one. Use
// FirebaseUser.getToken() instead.
String uid = user.getUid();
}
More info: https://firebase.google.com/docs/auth/android/manage-users
If you're using oAuth authentication and want to retrieve their profile photo from facebook, you'll find more information about how to do that at the link below:
https://firebase.google.com/docs/auth/android/facebook-login

Google signin from android app - What to do after signed in success?

I"ve read this question on SO, but im still not clear how i would authenticate a user after a successful google signIn. I have an idea and im looking for approval from you. After a successful google signIn i will have access to the GoogleSignInAccount object. In this object i can do something like store the token and users email as the credentials into a remote db so i can recognize the users profile on my servers end. This could look something like this from android client side:
private void handleSignInResult(GoogleSignInResult result) {
Log.d(TAG, "handleSignInResult:" + result.isSuccess());
if (result.isSuccess()) {
// Signed in successfully, show authenticated UI.
GoogleSignInAccount acct = result.getSignInAccount();
//now that i have an account lets store the token
String loginToken=acct.getIdToken();
storeTokenInRemoteDb(acct.getEmail(),loginToken);
updateUI(true);
} else {
// Signed out, show unauthenticated UI.
updateUI(false);
}
}
Is this the best practice to authenticate after good signIn success ?

For me I send the token to my server and then I validate it in the server side with sending request to
https://www.googleapis.com/oauth2/v3/tokeninfo?access_token=YOUR_TOKEN
That will return something like this if the token is still valid
{
"audience":"8819981768.apps.googleusercontent.com",
"user_id":"123456789",
"scope":"profile email",
"expires_in":436
}
And then I will also store the token locally in case the user logged out from my app and try to re-login with same google id and the token is still valid.

Use below code to access data such as name,emails etc
Log.d(TAG, "handleSignInResult:" + result.isSuccess());
if (result.isSuccess()) {
// Signed in successfully, show authenticated UI.
GoogleSignInAccount acct = result.getSignInAccount();
final String name = acct.getDisplayName();
final String email = acct.getEmail();
signOut();
if (name.contains(" ")) {
for (int i = 0; i < name.length(); i++) {
if (name.charAt(i) == ' ') {
firstName = name.substring(0, i);
lastName = name.substring((i + 1),
name.length());
break;
}
}
}

I wanted to add something. The email address should not be used as the primary key for your local or webserver storage after authenticating the google account. You should use the account ID as user can have multiple email accounts but will alwyas have the same account ID.
So you could do it like this:
String accountName=Plus.AccountApi.getAccountName(mGoogleApiClient);
String accountID = GoogleAuthUtil.getAccountId(accountName);
now that we have the accountID we can go ahead and use it as as the primary key in any database locally or on a webserver. How else can you handle multiple email accounts ?Or what if user changed the primary email address.
some more info is here
The other thing i wanted to mention is that a hacker could attack your server by just keep guessing the email address of the user, so i would not base it on email address. I would use a token. After i get a token from the google sign in process i would let the android client upload the token to my server but then i would let the server speak to google servers to again verify the email address with this token and verify the token itself.

Create new ParseUser using Google+ AccessToken returns InvalidSession?

I'm trying to create a new ParseUser using a Google+ SignIn. While I'm able to retrieve the access token successfully from Google, I get a ParseException(InvalidSession).
I'll post a few snippets that are relevant.
This is how im getting the AccessToken from Google
final String SCOPES = "https://www.googleapis.com/auth/plus.login ";
token = GoogleAuthUtil.getToken(
MainActivity.this,
Plus.AccountApi.getAccountName(mGoogleApiClient),
"oauth2:" + SCOPES);
Making ParseUser
ParseUser.becomeInBackground(token, new LogInCallback()
{
public void done(ParseUser user, ParseException e)
{
Log.i(TAG, "makeParseUser"+"2");
if (user != null)
{
// The current user is now set to user.
/*
user.put("name", s1);
user.put("email",s6);
user.saveInBackground();
*/
}else
{
// The token could not be validated.
Log.i(TAG, "makeParseUser"+e.getLocalizedMessage());
}
}
});
A similar question has been asked here but there doesn't seem to be a proper solution to it.

Currently Parse doesn't support G+ login. Practically it can be done by using Parse cloud code.
ParseUser.becomeInBackground(); expects Parse User token, but not G+ one.

How can I get twitter user profile in android?

How can I get the user name, email, location, avatar, etc., of an authenticated user of Twitter in Android via the API?
I wrote the code below, but it always returns null at twitter.showUser(twitter.getId());
public User getUserInfo(Object accessToken)
{
ConfigurationBuilder configurationBuilder = new ConfigurationBuilder();
configurationBuilder.setOAuthConsumerKey(mConsumer.getConsumerKey());
configurationBuilder.setOAuthConsumerSecret(mConsumer.getConsumerSecret());
twitter4j.Twitter twitter = new TwitterFactory(configurationBuilder.build()).getInstance();
try
{
twitter.setOAuthAccessToken((AccessToken) accessToken);
return twitter.showUser(twitter.getId());
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
I found another question here. People said that unable to retrieve email address of authenticated user of Twitter via api. So, How about other information such as fullname, avatar, phone number (if have),...?