How to plya ringtone in Flutter application when app is closed? - flutter

I am working on a project where I am using Agora for Video calling feature. I used flutter_ringtone_player to play ringtone whenever there is a call. It works fine when app is active but it is not working in the inactive state of the app.
Can anyone suggest me How i can make it work for my project.

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How implement Live tracking in my flutter app?

I would like implement a live tracking in the background—even if app wasn’t the currently active app?
Check this awesome blog on how to fetch location when the app is in the background.
https://medium.com/#pierre.sabot/how-to-fetch-user-location-in-background-with-flutter-e3494021bdf5

FCM custom sound notifications are not working on IOS Xcode

I'm developing a Flutter application for both Android and IOS. I'm sending to my users custom sound notifications using Firebase Cloud Messaging (FCM).
On Android everything is just fine, I'm receiving notifications with custom sounds. However, on IOS I'm receiving the notifications, but with default sound.
I have configured my Xcode as the following:
What am I doing wrong?
Your sound files should be plain directly to the Copy Bundle Resources (and not in the assets folder).

Is it possible to get the instance of an existing Isolate in Flutter after reopening the App?

I am using dart isolates to play music in background. I want to get the instance of the isolate that I spawned earlier to stop the music after closing and re-opening the Flutter App.
Is there a way to get the instance of existing isolates after re-opening the Flutter app?
An isolate does not keep running in the background when the application is not in foreground.
For currently available solutions see https://medium.com/flutter-io/executing-dart-in-the-background-with-flutter-plugins-and-geofencing-2b3e40a1a124
For
Android there is https://pub.dartlang.org/packages/android_alarm_manager
iOS there is https://github.com/flutter/plugins/tree/master/packages/location_background
https://github.com/flutter/flutter/issues/24278
https://github.com/flutter/flutter/issues/26178

reminders in ionic app without server code

Was anyone implemented a reminder system in an ionic app without server side code?
Basically, I'm building an ionic app (targeting Android and IOS) and I want to setup reminders. But my main problem is figuring out how to trigger them when the app is closed.
Check that plugin out : https://github.com/katzer/cordova-plugin-background-mode
This let you not put the app from sleep when exiting app.
However, this will not replace a push notification feature.

is it possible to continuously track gps location in phonegap app(iphone) in background(means when app is not running)

I am working on an iphone app which needs to pop up a notification when the user reaches some particular place. I am developing the app in phonegap. A function is available in phonegap to track gps location continuously i.e. "geolocation.watchPosition", but I want to know: will the function keep on tracking the location even if the app is not running(exited state)?
I recently came to know that for the desired functionality I have to create a phonegap plug in and embed it to the project. This worked for me.
you can do it if your app is runing in background but its not possible if the user stops the applicationcheck this post Is it possible to run a background process on the iPhone using private APIs?