Twilio Flutter

A Dart package for all platforms which helps developers with Twilio API services. This Dart Package can be integrated into any Flutter application to make use of Twilio API.

Features

• Send SMS programmatically
• Get all SMS related to a Twilio account
• Get more info on each SMS sent from a Twilio account
• Send WhatsApp messages programmatically
• Send Scheduled SMS
• Cancel Scheduled SMS
• Send Scheduled WhatsApp message
• Cancel Scheduled WhatsApp Message
• Twilio verification supporting multiple channels
• Send Messenger Texts

Getting Started

Check out our comprehensive Example provided with this plugin.

To use this package :

• add the dependency to your pubspec.yaml file.

dependencies:
  flutter:
    sdk: flutter
  twilio_flutter:

How to use

Please find the following values from Twilio Console:

• Account SID
• Twilio Number
• Auth Token
• Messaging Service SID (Optional, required for features like scheduled messages)
• Veridication service SID (Optional, required for Twilio verify feature)

Features and service list

Service	Feature	Feature info
TwilioFlutter	Send SMS	Send SMS to mobile number using Twilio number
TwilioFlutter	Send WhatsApp message	Send whatsApp message to any number from assigned Twilio number
TwilioFlutter	Get SMS list	Get all SMS from the account
TwilioFlutter	Get SMS details	Get all data related to a single SMS resource
TwilioMessagingService	Send scheduled SMS	Send SMS messages according to a time set, message will be sent from the service pool or send from custom number
TwilioMessagingService	Cancel scheduled SMS	Cancel scheduled SMS message
TwilioMessagingService	Send scheduled whatsapp message	Send WhatsApp message according to a time set, message will be sent from the service pool or send from custom number
TwilioMessagingService	Cancel scheduled whatsapp message	Cancel a scheduled whatsapp message
TwilioMessagingService	Send SMS	Send SMS message using messaging service, message will be sent from the service pool or send from custom number
TwilioMessagingService	Send whatsapp message	Send WhatsApp message, message will be sent from the service pool or send from custom number
TwilioMessenger	Send FB messenger message	Send FB messenger message

---

TwilioFlutter features

Create a new TwilioFlutter object and initialize with required values

final TwilioFlutter twilioFlutter = TwilioFlutter(
    accountSid: '', // replace with Account SID
    authToken: '', // replace with Auth Token
    twilioNumber: '' // replace with Twilio Number(With country code)
);

SMS

The following are the SMS related features in TwilioFlutter.

Send SMS

twilioFlutter.sendSMS() can be used to send SMS with required message body to any mobile number by providing the number and proper country code.

parameter	type	mandatory	remarks
toNumber	String	Yes	The number to which the message has to sent to, should be a mobile number with country code
messageBody	String	Yes	The body of the SMS message
fromNumber	String	No	A custom fromNumber other than the one configured with TwilioFlutter object.

• Use sendSMS with the recipient number and message body using the default twilioNumber.

TwilioResponse response = await twilioFlutter.sendSMS(
toNumber : '',
messageBody : 'hello world');

• Use sendSMS with the recipient number and message body using custom twilioNumber.

TwilioResponse response = await twilioFlutter.sendSMS(
toNumber : '',
messageBody : 'hello world',
fromNumber:''
);

WhatsApp

The following are the WhatsApp related features in TwilioFlutter.

Send WhatsApp Message

twilioFlutter.sendWhatsApp() can be used to send WhatsApp message with required message body to any mobile number by providing the number and proper country code.

TwilioResponse response = await twilioFlutter.sendWhatsApp(toNumber : '',// replace with Mobile Number(With country code)
messageBody : 'hello world');

parameter	type	mandatory	remarks
toNumber	String	Yes	The number to which the message has to sent to, should be a mobile number with country code
messageBody	String	Yes	The body of the message
fromNumber	String	No	A custom fromNumber other than the one configured with TwilioFlutter object. Should be mobile number with country code.

Twilio Verification

The following are the Twilio verify related features in TwilioFlutter.

Create verification service

Verification service has to be created in order to access all the features. This can be done either through the Twilio console or by using the following by providing a service name:

TwilioResponse response = await twilioFlutter.createVerificationService(serviceName:'service name');

This method returns TwilioResponse and metadata from TwilioResponse will have the verification service ID in the key: "sid". This sid should be used for the verification.

Send verification code

This method is used to send the verification code to the desired channel.

TwilioResponse response = await twilioFlutter.sendVerificationCode(verificationServiceId:'sid',
recipient: '',
verificationChannel: VerificationChannel.SMS
);

Currently supported channels are:

• SMS
• WHATSAPP
• CALL

Recipient: can be mobile number, email etc depending on channel.

Verify code

To verify a code use the verify_code() method by passing the code input.

TwilioResponse response = await twilioFlutter.verifyCode(verificationServiceId:'sid',
recipient: '',
code: ''
);

This method returns TwilioResponse and metadata from TwilioResponse has a status key, if it is "approved" then the verification is successful.

Common

The following are the common services provided by TwilioFlutter.

View Messages List

The twilioFlutter.getSmsList() can be used to view all the SMS messages that was sent using the twilio account, an optional pageSize parameter can be passed which defaults to 20.

final TwilioResponse response = await twilioFlutter.getSmsList({String pageSize}); //pageSize defaults to 20

View Single Message

The twilioFlutter.getSMS() can be used to view the details of a single SMS message resource using the SID of the message. The SID can be found using the twilioFlutter.getSmsList().

final TwilioResponse response = await twilioFlutter.getSMS(String messageSID); //Use message sid from the individual messages.

Change Twilio Number

The twilioFlutter.changeDefaultTwilioNumber() can be used to update the default Twilio number that was used to initialize the TwilioFlutter object.

twilioFlutter.changeDefaultTwilioNumber(''); // To change the twilio number(With country code)

---

TwilioMessagingService features

Create a new TwilioMessagingService object and initialize with required values

final TwilioMessagingService twilioMessagingService = TwilioMessagingService(
    accountSid: '', // replace with Account SID
    authToken: '', // replace with Auth Token
    messagingServiceSid: '' // replace with messaging service sid from twilio console
);

SMS

The following are the SMS related features in TwilioMessagingService.

Send SMS using Messaging service

twilioMessagingService.sendSMS() can be used to send SMS with required message body to any mobile number by providing the number and proper country code. There is two ways to use the function:

• Use sendSMS with the recipient number and message body using the default twilioNumber.

TwilioResponse response = await twilioMessagingService.sendSMS(
toNumber : '',// replace with Mobile Number(With country code)
messageBody : 'hello world');

• Use sendSMS with the recipient number and message body using custom fromNumber.

TwilioResponse response = await twilioMessagingService.sendSMS(
toNumber : '',// replace with Mobile Number(With country code)
messageBody : 'hello world',
fromNumber:''// replace with Mobile Number(With country code)
);

Send Scheduled SMS Message

Scheduled messages can be sent using twilioMessagingService.sendScheduledSms() if the sendAt is at least 15 after the current time.

TwilioResponse response = await twilioMessagingService.sendScheduledSms(
toNumber : '',
messageBody : 'hello world',
sendAt:'2024-02-18T16:18:55Z'
// Datetime has to be in the same format
);

Cancel Scheduled SMS

Scheduled SMS can be cancelled using the messageSid with twilioMessagingService.cancelScheduledSms().

TwilioResponse response = await twilioMessagingService.cancelScheduledSms(messageSID:''// replace with message SID);

WhatsApp

The following are the WhatsApp related features in TwilioMessagingService.

Send WhatsApp Message

twilioMessagingService.sendWhatsAppMessage() can be used to send WhatsApp message with required message body to any mobile number by providing the number and proper country code.

TwilioResponse response = await twilioMessagingService.sendWhatsAppMessage(toNumber : '',// replace with Mobile Number(With country code)
messageBody : 'hello world');

Send Scheduled WhatsApp Message

Scheduled messages can be sent using twilioMessagingService.sendScheduledWhatsAppMessage() if the sendAt is at least 15 after the current time.

TwilioResponse response = await twilioMessagingService.sendScheduledWhatsAppMessage(
toNumber : '',
messageBody : 'hello world',
sendAt:'2024-02-18T16:18:55Z'
// Datetime has to be in the same format
);

Cancel Scheduled WhatsApp Message

Scheduled whatsapp messages can be cancelled using the messageSid with twilioMessagingService.cancelScheduledWhatsAppMessage().

TwilioResponse response = await twilioMessagingService.cancelScheduledWhatsAppMessage(messageSID:''// replace with message SID
);

---

TwilioMessenger features (Experimental)

Create a new TwilioMessenger object and initialize with required values

final TwilioMessenger twilioMessenger = TwilioMessenger(
    accountSid: '', // replace with Account SID
    authToken: '', // replace with Auth Token
    messengerId: '' // replace with FB page ID
);

Send Messenger text

Send Messenger text message using the send_messenger() method.

TwilioResponse response = await twilioMessenger.sendMessenger(recipient:'',
messageBody: ''
);

---

TwilioResponse

All the function calls from all the services will return a TwilioResponse Object.

TwilioResponse wraps the response of all the APIs. The fields in TwilioResponse:

• responseCode: give the response code of the requests. Possible values: 200,400 etc.
• responseState: shows if the request fails or completes properly. Possible values: ResponseState.SUCCESS or ResponseState.FAILED
• errorData : Holds the ErrorData object in case of any failures/exceptions.
• metadata : Holds all the info from the response of the API as json.

ErrorData object has the details about the errors. The fields are:

• code
• status
• message
• more_info

---

Future Features

• Cancel Scheduled Messages
• Send message through Facebook Messenger
• Twilio verification
• Email Sending Support
• Update a Message resource
• Delete a Message resource
• Alphanumeric Sender IDs in Messaging Services
• More Support for Messaging Service

Supported Platforms

• Android
• iOS
• Web
• MacOs
• Windows
• Linux

Useful articles

• https://www.dhiwise.com/post/twilio-flutter-sdk-for-beginners-enhance-flutter-development
• https://levelup.gitconnected.com/twilio-text-messages-with-flutter-fe63f41eebe9https://community.flutterflow.io/c/community-custom-widgets/post/send-an-sms-with-twilio-4ihPgc6fW0FwWtC

Issues

Please file any issues, bugs or feature requests as an issue on our GitHub page.

Want to contribute

If you would like to contribute to the plugin (e.g. by improving the documentation, solving a bug or adding a cool new feature), please carefully review our contribution guide and send us your pull request.

Author

This Twilio Flutter plugin for Flutter is developed by Adarsh Balachandran.