How to send sms with URL_launcher package with flutter? - flutter

Question

Hello I search a simple example (Android and iOS) to send SMS with this package
https://pub.dartlang.org/packages/url_launcher
In the plugin page I only see how to open sms native app with phone number, but no extra message
sms:<phone number>, e.g. sms:5550101234 Send an SMS message to <phone
number> using the default messaging app

Answer 1

On Android the full sms: URI is supported and you can send a message with a body like that (RFC5724):
_textMe() async {
// Android
const uri = 'sms:[phone]?body=hello%20there';
if (await canLaunch(uri)) {
await launch(uri);
} else {
// iOS
const uri = 'sms:0039-222-060-888?body=hello%20there';
if (await canLaunch(uri)) {
await launch(uri);
} else {
throw 'Could not launch $uri';
}
}
}
On iOS the official doc says you can only use the number field of The URI.
Instead as Konstantine pointed out, if you use a non standard URI and instead and instead of starting the query string with ? you use & it still works as well. It seems like an undocumented feature.
The sms scheme is used to launch the Messages app. The format for URLs
of this type is “sms:”, where is an optional parameter
that specifies the target phone number of the SMS message. This
parameter can contain the digits 0 through 9 and the plus (+), hyphen
(-), and period (.) characters. The URL string must not include any
message text or other information.
PS. to check the plaform you could use the dart.io library Platform class:
_textMe() async {
if (Platform.isAndroid) {
const uri = 'sms:[phone]?body=hello%20there';
await launch(uri);
} else if (Platform.isIOS) {
// iOS
const uri = 'sms:0039-222-060-888&body=hello%20there';
await launch(uri);
}
}

Answer 2

you can trying this for android and IOS:
sendMessage() async {
if(Platform.isAndroid){
//FOR Android
url ='sms:[phone]?body=message';
await launch(url);
}
else if(Platform.isIOS){
//FOR IOS
url ='sms:[phone]&body=message';
}
}

Answer 3

This answer is for the new people coming in here for answers.
The previous answers are right however they won't work on iOS.
The App might crash on iOS but work on Android.
so to solve that we need to implement sending SMS in the way given below
String? encodeQueryParameters(Map<String, String> params) {
return params.entries
.map((e) => '${Uri.encodeComponent(e.key)}=${Uri.encodeComponent(e.value)}')
.join('&');
}
Uri smsUri = Uri(
scheme: 'sms',
path: '$phoneNumber',
query: encodeQueryParameters(<String, String>{
'body':
'Hey this is message body'
}),
);
try {
if (await canLaunch(smsUri.toString())) {
await launch(smsUri.toString());
}
} catch (e) {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Some error occured'),
),
);
}

Answer 4

Final updated answer post flutter 3 and latest url launcher package
smsUri = Uri(scheme: 'sms', path: phoneNumber);
try {
print(smsUri.toString());
if (await canLaunchUrl(
smsUri,
)) {
await launchUrl(smsUri);
}
} catch (e) {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: const Text('Some error occured'),
),
);
}

Answer 5

Here is the updated answer for sending SMS based on the OS of the device. I have tried the previous answers but I was facing body text issues on IOS devices.
_launchSms() async {
try {
if (Platform.isAndroid) {
String uri = 'sms:$phoneNumber?body=${Uri.encodeComponent("Hello there")}';
await launchUrl(Uri.parse(uri));
} else if (Platform.isIOS) {
String uri = 'sms:$phoneNumber&body=${Uri.encodeComponent("Hello there")}';
await launchUrl(Uri.parse(uri));
}
} catch (e) {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Some error occurred. Please try again!'),
),
);
}
}