Develop Reference

How to send an SMS from the default messaging app on Android?

I need the ability to both send and delete SMSes from my app. The code I'm using is shown. Sending an SMS does not require my app to be the default SMS app, however deleting does.
What is weird is that the code to send the SMS does work when the app is not default, but not when it is (the code to delete SMSes works the other way around, however this is expected).
I assume that this problem arises because even though another application may be sending the SMSes, only the default SMS app can write to the SMS provider, so I need to write to them manually. However, when having my app as default, other apps can still send SMSes using the same code provided, which is strange.
I have also tried writing to the SMS providers manually, specifically to content://sms/outbox and tocontent://sms/sent, none of which have worked. Although, the latter does display the message in the preinstalled SMS app.
public static void sendSMS(String phoneNo, String msg, Context context) {
try {
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNo, null, msg, null, null);
Toast.makeText(context, "Message Sent",
Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(context,e.getMessage().toString(),
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
public static void deleteSMS(Context context, String message, String number) {
try {
Log.i(MainActivity.TAG, "delteSMS: try statement");
Uri uriSms = Uri.parse("content://sms/sent");
Cursor c = context.getContentResolver().query(uriSms,
new String[] { "_id", "thread_id", "address",
"person", "date", "body" }, null, null, null);
if (c != null && c.moveToFirst()) {
do {
long id = c.getLong(0);
long threadId = c.getLong(1);
String address = c.getString(2);
String body = c.getString(5);
// Log.i(MainActivity.TAG, "Found SMS: " + body);
if (message.equals(body) && address.equals(number)) {
Log.i(MainActivity.TAG, "Deleting sms with" + threadId);
context.getContentResolver().delete(
Uri.parse("content://sms/" + id), null, null);
}
} while (c.moveToNext());
}
} catch (Exception e) {
Log.i(MainActivity.TAG, "Could not delete SMS from inbox: " + e.getMessage());
}
}
TL;DR
I need to know how to send SMSes from an application which is set as default, since the usual procedure does not work.
Thanks

Android send email with attachments using only email apps

The official docs show how you can send an email with an attachment:
public void composeEmail(String[] addresses, String subject, Uri attachment) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("*/*");
intent.putExtra(Intent.EXTRA_EMAIL, addresses);
intent.putExtra(Intent.EXTRA_SUBJECT, subject);
intent.putExtra(Intent.EXTRA_STREAM, attachment);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
}
}
It then says:
If you want to ensure that your intent is handled only by an email app (and not other text messaging or social apps), then use the ACTION_SENDTO action and include the "mailto:" data scheme.
Like so:
public void composeEmail(String[] addresses, String subject) {
Intent intent = new Intent(Intent.ACTION_SENDTO);
intent.setData(Uri.parse("mailto:")); // only email apps should handle this
intent.putExtra(Intent.EXTRA_EMAIL, addresses);
intent.putExtra(Intent.EXTRA_SUBJECT, subject);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
}
}
But actually, I want a combination of the above... i.e. send an email with an attachment and using only an email app.
But when using intent.setData(Uri.parse("mailto:")) in combination with Intent.ACTION_SEND or Intent.ACTION_SEND_MULTIPLE, nothing happens... no email app (or app chooser) opens at all.
So how do I send an email with attachment (or multiple attachments) whilst also restricting the app to email apps?

That mailto: URI string appears invalid without recipients; try something alike this instead:
intent.setData(Uri.parse("mailto:" + String.join(",", addresses)));
See RFC 6068: The 'mailto' URI Scheme.

Remove if (intent.resolveActivity(getPackageManager()) != null) check and it will open the intent. Usually the OS returns null whether the email handling apps exist or not.

How to make a reusable java function for android webview

Please am very new to java, am trying to put my website in webview, i have few lines of code that send user to email form and is working very fine. But now i have to use the same code in more than 3 place when url match something and i know that there will be a way to put this code one place as a function then call it and time i want to use it. please can someone help me.
function RequestMailForm(newbody, newsubject, newemailto, newmailbbc){
/* That email code*/
}
mva.setWebViewClient(new WebViewClient() {
if (url.startsWith("mailto:")) {
url = url.substring(7);
String body = "Body of message.";
Intent mail = new Intent(Intent.ACTION_SEND);
mail.setType("application/octet-stream");
mail.putExtra(Intent.EXTRA_EMAIL, new String[] { url });
mail.putExtra(Intent.EXTRA_SUBJECT, "Subject");
mail.putExtra(Intent.EXTRA_TEXT, body);
startActivity(mail);
return true;
}
if (url.startsWith("http://example.com/help") || url.startsWith("https://example.com/contact")){
RequestMailForm(newbody, newsubject, newemailto, newmailbbc);
}
});

Create a class and put sendEmail method with message and email paramater.
See the code below.
class SendEmail {
Context context;
public SendEmail(Context context){
this.context = contex;
}
//send an email
public void send(String email) {
Intent emailIntent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(
"mailto", email, null));
intent.setType("message/rfc822");
intent.putExtra(Intent.EXTRA_SUBJECT, "Subject");
intent.putExtra(Intent.EXTRA_TEXT, "Body of message");
context.startActivity(Intent.createChooser(emailIntent, "Send email..."));
}
}
Then create an object of the SendEmail class and call that function every time you want to send an email like this:
if (url.startsWith("mailto:")) {
url = url.substring(7);
sendEmail.send(url);
return true;
}

send confirm sms android without to see the sending message [duplicate]

I have an auto reply sms Android application I built and I don't want the auto reply (sent sms) to show in the default messaging app. I have searched and searched and couldn't find an answer. Is there a way to bypass writing the sent sms into the default messaging app?
Here my BroadcastReciever I am using to get the data and send out the message
public class SmsReceiver extends BroadcastReceiver {
ParseUser user = ParseUser.getCurrentUser();
// Auto reply message composed of the current reply and url from that business
String msg = user.getString("myCurrentReply") + " " + user.getString("couponUrlChosen");
List smsFromList = user.getList("smsFrom");
String userName = (String) user.get("username");
#Override
public void onReceive(final Context context, Intent intent) {
Bundle bundle = intent.getExtras();
Object messages[] = (Object[]) bundle.get("pdus");
SmsMessage smsMessage[] = new SmsMessage[messages.length];
for (int n = 0; n < messages.length; n++) {
smsMessage[n] = SmsMessage.createFromPdu((byte[]) messages[n]);
}
final String pno = smsMessage[0].getOriginatingAddress();
user.put("lastSmsFrom", pno);
user.saveInBackground();
// show first message
Toast toast = Toast.makeText(context, "Received SMS: " + smsMessage[0].getMessageBody(), Toast.LENGTH_LONG);
toast.show();
// Check Phone Number from SMS Received against Array in User Row
ParseQuery<ParseObject> query = ParseQuery.getQuery("_User");
Log.d("Username: ", userName);
query.whereEqualTo("username", userName);
query.whereContainedIn("lastSmsFrom", smsFromList);
query.findInBackground(new FindCallback<ParseObject>() {
public void done(List<ParseObject> smsList, ParseException e) {
if (e == null) {
Log.d("Errors", "none");
if (smsList.size() == 0) {
// Send SMS
sendSms(pno, msg);
// Add Phone number to smsFrom in currentUsers Row
user.addUnique("smsFrom", pno);
// Save Phone Number in Array
user.saveInBackground();
Log.d("List size: ", " " + smsList.size());
}
} else {
Log.d("Error Message: ",
e.getMessage());
}
Log.d("Already sent to this number today. ", " " + smsList.size());
}
});
}
private void sendSms(String phonenumber, String message) {
SmsManager manager = SmsManager.getDefault();
manager.sendTextMessage(phonenumber, null, message, null, null);
}
}

Prior to KitKat, SMS sent using SmsManager require the app sending the message to insert it into the Provider, so it would just be a matter of omitting that.
Starting with KitKat, any app that is not the default SMS app and uses SmsManager to send messages will have the messages automatically written to the Provider for it by the system. There's no way to prevent this, and, furthermore, the app won't be able to delete those messages, either, as it won't have write access to the Provider.*
The app that is the default SMS app is responsible for writing its outgoing messages, so it would be able to omit that step. The system does no automatic writes for the default SMS app.
* There is a security hole in 4.4 only, by which a non-default app can gain write access to the Provider. It is detailed in my answer here, but it will not work in versions after KitKat.

How to catch a Firebase Auth specific exceptions

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();
}
// ...
}
});