ShareLocation | Mobile application for real-time geolocation | Socket library

'OnAppearing' method fired when you navigate from page and back to that page from another in stack. In your case, you put your application to sleep and when you resume the app then OnAppearing event will not call because page has not appeared though it was already there.

You can use MessagingCenter to achieve your goal.

App.xaml.cs

Your screenshot is showing data in Cloud Firestore, but your code is using the SDK for Firebase Realtime Database. These databases are completely separate from each other. If you want to use Firestore, you should follow the documentation for working with it instead.

on calling stopService(intent);

the override method onDestroy will start

try to do this

Look into using broadcast receiver. The basic mistake here is that the retrieval of the location is running on a different thread asynchronously. So by the time you call your sendXxx() methods the location has not been resolved yet. With asynchronous code you need the service to push you the result after the location has been resolved. The standard way in this case would be the broadcast receiver.