I have integrated Firebase Dynamic link in my Flutter application to open and navigate application users to specific screen in app.
For that first of all I have added below plugin in pubspec.yaml file:
firebase_dynamic_links: ^5.0.5
Then, I have created a separate class to handle related stuffs as below:
class DynamicLinkService {
late BuildContext context;
FirebaseDynamicLinks dynamicLinks = FirebaseDynamicLinks.instance;
Future<void> initDynamicLinks(BuildContext context) async {
this.context = context;
dynamicLinks.onLink.listen((dynamicLinkData) {
var dynamicLink=dynamicLinkData.link.toString();
if (dynamicLink.isNotEmpty &&
dynamicLink.startsWith(ApiConstants.baseUrl) &&
dynamicLink.contains("?")) {
//Getting data here and navigating...
...
...
...
}
}).onError((error) {
print("This is error >>> "+error.message);
});
}
}
Now, I am initialising Deep-link as below in my home_screen:
final DynamicLinkService _dynamicLinkService = DynamicLinkService();
and then calling below method in initState()
#override
void initState() {
SchedulerBinding.instance.addPostFrameCallback((_) async {
await _dynamicLinkService.initDynamicLinks(context);
});
}
This is working like a charm! when my application is in recent mode or in background mode.
But the issue is when the application is closed/Killed, clicking on dynamic link just open the app but could not navigate.
What might be the issue? Thanks in advance.
Let me answer my own question, It might be useful for someone!
So, In above code I forgot to add code to handle dynamic link while the app is in closed/kill mode.
We need to add this code separately:
//this is when the app is in closed/kill mode
final PendingDynamicLinkData? initialLink = await FirebaseDynamicLinks.instance.getInitialLink();
if (initialLink != null) {
handleDynamicLink(initialLink);
}
So, final code looks like as below:
//this is when the app is in closed/kill mode
final PendingDynamicLinkData? initialLink = await FirebaseDynamicLinks.instance.getInitialLink();
if (initialLink != null) {
handleDynamicLink(initialLink);
}
//this is when the app is in recent/background mode
dynamicLinks.onLink.listen((dynamicLinkData) {
handleDynamicLink(dynamicLinkData);
}).onError((error) {
print("This is error >>> "+error.message);
});
Its working like a charm now! That's All.
Related
I have implemented this method so that when a user clicks the dynamic link it will be redirected to a specific page. Everything works alright while the app is running, but when I kill/close the app and try to do the same thing, it opens the app on the initial screen (Home Page). How can I make it work in this case?
Future<void> initDynamicLinks() async {
FirebaseDynamicLinks.instance.onLink.listen((dynamicLinkData) {
id = dynamicLinkData.link
.toString()
.substring(dynamicLinkData.link.toString().lastIndexOf('/') + 1);
Get.to(
() => Page(
id: id,
),
);
}).onError((error) {
if (kDebugMode) {
print(error.message);
}
});
}
void initState() {
// TODO: implement initState
initDynamicLinks();
super.initState();
}
I think .onLink.listen() function only get hit when app is resumed from background.
If you want your deeplink work when app have a fresh start then just put this code above .onLink.listen() function...
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
final PendingDynamicLinkData data = await FirebaseDynamicLinks.instance.getInitialLink();
final Uri deepLink = data?.link;
// Here you should navigate to your desired screen
Hope it helps you
I am implementing a password recovery function based on the url sent to the email. Opening the app based on that url was successful. But instead of directly opening the required page in the app that is in the background, it duplicates the app. Although it still leads me to the password recovery page, now there will be 2 same apps running side by side
Procedure
Enter your email to send the password reset link
Click submit
Open the email containing the recovery link
Duplicate the app and open a recovery password page
Things what happen
Splash screen, first page open in the app, I am trying to do as instructed from uni_links package but still no success. Currently the function getInitialLink has the effect of opening the app based on the recovery link
class SplashController extends GetxController {
final SharedPreferencesHelper _helper = Get.find<SharedPreferencesHelper>();
late StreamSubscription sub;
#override
void onReady() async {
super.onReady();
await checkToken();
}
Future<void> checkToken() async {
await Future.delayed(Duration(seconds: 3));
var token = _helper.getToken();
if (token == null) {
Get.offNamed(Routes.LOGIN);
} else {
Get.offNamed(Routes.MAIN);
}
}
#override
void onInit() {
super.onInit();
initUniLinks();
}
Future<Null> initUniLinks() async {
// Platform messages may fail, so we use a try/catch PlatformException.
try {
String? initialLink = await getInitialLink();
if (initialLink != null) {
print("okay man");
Get.toNamed(Routes.RECOVERY);
}
sub = getLinksStream().listen((link) {
}, onError: (err) {
});
} on PlatformException {
// Handle exception by warning the user their action did not succeed
// return?
}
}
}
I found the solution, actually this answer is already on Stackoverflow, and it's really simple.
In the AndroidManifest.xml file of the app. Find "android:launchMode" and change its old value to singleTask. And here is the result
android:launchMode="singleTask"
In my flutter app I want that whenever I send a link to any user that link will open my app and fill the form given at the page.
For example, if this is my app:
And then I sent this link through email : https://example.com/fillMyForm?username=johndoe
Then this will open my app and fill the form, something like this:
Thanks in advance.
You can use firebase dynamic links for that. Refer this link https://medium.com/better-programming/deep-linking-in-flutter-with-firebase-dynamic-links-8a4b1981e1eb
Retrieve dynamic link in flutter like this and open form screen when link get in register listener.
class MainWidgetState extends State<MainWidget> {
#override
void initState() {
super.initState();
this.initDynamicLinks();
}
initDynamicLinks(BuildContext context) async {
await Future.delayed(Duration(seconds: 3));
var data = await FirebaseDynamicLinks.instance.getInitialLink();
var deepLink = data?.link;
final queryParams = deepLink.queryParameters;
if (queryParams.length > 0) {
var userName = queryParams['userId'];
openFormScreen(userName);
}
FirebaseDynamicLinks.instance.onLink(onSuccess: (dynamicLink)
async {
var deepLink = dynamicLink?.link;
final queryParams = deepLink.queryParameters;
if (queryParams.length > 0) {
var userName = queryParams['userId'];
openFormScreen(userName);
}
debugPrint('DynamicLinks onLink $deepLink');
}, onError: (e) async {
debugPrint('DynamicLinks onError $e');
});
}
openFormScreen(String userName){
Navigator.of(context).pushNamed("routeFormScreen", arguments: {"name": userName});
}
}
I am able to implement voice and video call using agora.io library which is available at https://www.agora.io/ && https://github.com/AgoraIO/Flutter-SDK
how ever the process for starting a call is both user has to join a particular channel name defined by the user manually or automatically. which is not the practical way.
Is there any way to create a separate signalling system (may be using, nodejs socket, firebase or one-signal notification? )
What's the simultaneous/parallel way to be used along side that?
or what's the complete alternative?
Agora.io doesn't provide any method other passing a channel name manually or a default string. But what you can do is use Firebase dynamic link to share the channel name via a dynamic link. This link will redirect you to the page where you're taking channel name as input and fill the channel name according to the parameters passed. So your code will look something like:
class AgoraImpementation extends State<AgoraImplementation> {
#override
void initState() {
super.initState();
this.initDynamicLinks();
}
initDynamicLinks(BuildContext context) async {
await Future.delayed(Duration(seconds: 3));
var data = await FirebaseDynamicLinks.instance.getInitialLink();
var deepLink = data?.link;
final queryParams = deepLink.queryParameters;
if (queryParams.length > 0) {
var channelName = queryParams['channel_name'];
openFormScreen(channelName);
}
FirebaseDynamicLinks.instance.onLink(onSuccess: (dynamicLink)
async {
var deepLink = dynamicLink?.link;
final queryParams = deepLink.queryParameters;
if (queryParams.length > 0) {
var userName = queryParams['channel_name'];
openFormScreen(channelName);
}
debugPrint('DynamicLinks onLink $deepLink');
}, onError: (e) async {
debugPrint('DynamicLinks onError $e');
});
}
openFormScreen(String userName){
Navigator.of(context).pushNamed("routeFormScreen", arguments: {"channelName": channelName});
}
}
Programmatically generated dynamic links are not properly catched by
FirebaseDynamicLinks.instance.getInitialLink().
if the app is closed. However, if the app is open it is properly detected by the listener for new incoming dynamic links. It is not clear to me if it is a setup problem, how I generate the dynamic link.
To Reproduce
First set up Firebase for Flutter project as documented. Then to set up a dynamic link:
/// See also
/// https://firebase.google.com/docs/dynamic-links/use-cases/rewarded-referral
/// how to implement referral schemes using Firebase.
Future<ShortDynamicLink> buildDynamicLink(String userId) async {
final PackageInfo packageInfo = await PackageInfo.fromPlatform();
final String packageName = packageInfo.packageName;
var androidParams = AndroidParameters(
packageName: packageInfo.packageName,
minimumVersion: Constants.androidVersion, // app version and not the Android OS version
);
var iosParams = IosParameters(
bundleId: packageInfo.packageName,
minimumVersion: Constants.iosVersion, // app version and not the iOS version
appStoreId: Constants.iosAppStoreId,
);
var socialMetaTagParams = SocialMetaTagParameters(
title: 'Referral Link',
description: 'Referred app signup',
);
var dynamicLinkParams = DynamicLinkParameters(
uriPrefix: 'https://xxxxxx.page.link',
link: Uri.parse('https://www.xxxxxxxxx${Constants.referralLinkPath}?${Constants.referralLinkParam}=$userId'),
androidParameters: androidParams,
iosParameters: iosParams,
socialMetaTagParameters: socialMetaTagParams,
);
return dynamicLinkParams.buildShortLink();
}
This dynamic link then can be shared with other new users.
I listen for initial links at app startup and then for new incoming links.
1) The link properly opens the app if the app is not running but the getInitialLink does not get it.
2) If the app is open the link is properly caught by the listener and all works.
Here is the very simple main.dart that I used to verify 1) that the initial link is not found with FirebaseDynamicLinks.instance.getInitialLink().
void main() async {
WidgetsFlutterBinding.ensureInitialized();
PendingDynamicLinkData linkData = await FirebaseDynamicLinks.instance.getInitialLink();
String link = linkData?.link.toString();
runApp(MyTestApp(link: link));
}
class MyTestApp extends StatelessWidget {
final String link;
MyTestApp({this.link});
#override
Widget build(BuildContext context) {
return MaterialApp(
builder: (BuildContext context, Widget child) {
return Scaffold(
body: Container(
child: Center(
child: Text('Initial dynamic Firebase link: $link')
),
),
);
}
);
}
}
Expected behavior
The link should open the app and trigger FirebaseDynamicLinks.instance.getInitialLink()..
Additional context
I hope properly configured Firebase project with Firebase console. To verify this I created a dynamic link to be used with Firebase Auth 'signup by email link' and these dynamic links are working as expected, also when the app is not open.
The point here is that the referral dynamic link that I generate programmatically is opening the app when it is closed but is then not caught by FirebaseDynamicLinks.instance.getInitialLink(), and to make things more confusing, works as expected if the app is open. In that case it is caught by the listener FirebaseDynamicLinks.instance.onLink.
I also set up the WidgetsBindingObserver in Flutter to handle that callback as required, when the app gets its focus back.
Any help is greatly appreciated. Debugging is very tricky, as you need to do it on a real device and not in the simulator. To make things worse, I did not figure out how to attach a debugger while the dynamic link opens the app. This means I am also stuck in investigating this issue further.
In The FirebaseDynamicLinks Two Methods 1) getInitialLink() 2) onLink().
If When Your App Is Open And You Click On Dynamic Link Then Will Be Call FirebaseDynamicLinks.instance.onLink(), If Your App Is Killed Or Open From PlayStore Then You Get From FirebaseDynamicLinks.instance.getInitialLink();.
First Of You Need To Initialise Instance Of FirebaseDynamicLinks.instance.
static void initDynamicLinks() async {
final PendingDynamicLinkData data =
await FirebaseDynamicLinks.instance.getInitialLink();
final Uri deepLink = data?.link;
if (deepLink != null && deepLink.queryParameters != null) {
SharedPrefs.setValue("param", deepLink.queryParameters["param"]);
}
FirebaseDynamicLinks.instance.onLink(
onSuccess: (PendingDynamicLinkData dynamicLink) async {
final Uri deepLink = dynamicLink?.link;
if (deepLink != null && deepLink.queryParameters != null) {
SharedPrefs.setValue("param", deepLink.queryParameters["param]);
}
}, onError: (OnLinkErrorException e) async {
print(e.message);
});
}
Initialize Link Listener. This works for me.
class _MainAppState extends State<MainApp> {
Future<void> initDynamicLinks() async {
print("Initial DynamicLinks");
FirebaseDynamicLinks dynamicLinks = FirebaseDynamicLinks.instance;
// Incoming Links Listener
dynamicLinks.onLink.listen((dynamicLinkData) {
final Uri uri = dynamicLinkData.link;
final queryParams = uri.queryParameters;
if (queryParams.isNotEmpty) {
print("Incoming Link :" + uri.toString());
// your code here
} else {
print("No Current Links");
// your code here
}
});
// Search for Firebase Dynamic Links
PendingDynamicLinkData? data = await dynamicLinks
.getDynamicLink(Uri.parse("https://yousite.page.link/refcode"));
final Uri uri = data!.link;
if (uri != null) {
print("Found The Searched Link: " + uri.toString());
// your code here
} else {
print("Search Link Not Found");
// your code here
}
}
Future<void> initFirebase() async {
print("Initial Firebase");
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
// await Future.delayed(Duration(seconds: 3));
initDynamicLinks();
}
#override
initState() {
print("INITSTATE to INITIALIZE FIREBASE");
super.initState();
initFirebase();
}
I tried Rohit's answer and because several people face the same issue I add here some more details. I created a stateful widget that I place pretty much at the top of the widget tree just under material app:
class DynamicLinkWidget extends StatefulWidget {
final Widget child;
DynamicLinkWidget({this.child});
#override
State<StatefulWidget> createState() => DynamicLinkWidgetState();
}
class DynamicLinkWidgetState extends State<DynamicLinkWidget> with WidgetsBindingObserver {
#override
void initState() {
super.initState();
WidgetsBinding.instance.addObserver(this);
locator.get<DynamicLinkService>().initDynamicLinks();
}
#override
void dispose() {
WidgetsBinding.instance.removeObserver(this);
super.dispose();
}
#override
Widget build(BuildContext context) {
return Container(child: widget.child);
}
}
I use the getit package to inject services. The dynamic link service is roughly like this:
class DynamicLinkService {
final UserDataService userDataService;
final ValueNotifier<bool> isLoading = ValueNotifier<bool>(false);
final BehaviorSubject<DynamicLinkError> _errorController = BehaviorSubject<DynamicLinkError>();
Stream<DynamicLinkError> get errorStream => _errorController.stream;
DynamicLinkService({#required this.userDataService});
void initDynamicLinks() async {
final PendingDynamicLinkData data = await FirebaseDynamicLinks.instance.getInitialLink();
final Uri deepLink = data?.link;
if (deepLink != null) {
processDynamicLink(deepLink);
}
FirebaseDynamicLinks.instance.onLink(
onSuccess: (PendingDynamicLinkData dynamicLink) async {
final Uri deepLink = dynamicLink?.link;
if (deepLink != null) {
print('=====> incoming deep link: <${deepLink.toString()}>');
processDynamicLink(deepLink);
}
},
onError: (OnLinkErrorException error) async {
throw PlatformException(
code: error.code,
message: error.message,
details: error.details,
);
}
);
}
Future<void> processDynamicLink(Uri deepLink) async {
if (deepLink.path == Constants.referralLinkPath && deepLink.queryParameters.containsKey(Constants.referrerLinkParam)) {
var referrer = referrerFromDynamicLink(deepLink);
userDataService.processReferrer(referrer);
} else {
await FirebaseEmailSignIn.processDynamicLink(
deepLink: deepLink,
isLoading: isLoading,
onError: this.onError
);
}
}
void onError(DynamicLinkError error) {
_errorController.add(error);
}
}
You see that my app has to process two types of dynamic link, one is for email link signup, the other link is our referral link that is used to link users together and allow us to understand who introduced a new user to us. This setup works now for us. Hope it helps others too.