Flutter: local notification plugin, navigate to specific screen when the user tap the notification

Pass a navigatorKey to MaterialApp and use this key to get the context. This context contains a Navigator and you can use it to switch to whatever page you want.

https://docs.flutter.io/flutter/material/MaterialApp/navigatorKey.html

With the latest change you've done, you being taken to the home page, is more to do with the fact that you instantiate and initialise the plugin a couple of pages further in your app. considering the app got killed, the plugin would've been killed too. you should look into initialising the plugin closer to when your app starts e.g. around when the app is created or when the first page is created, depending on the behaviour you want. In this issue https://github.com/MaikuB/flutter_local_notifications/issues/99, another dev has been able to change the first page shown if the app is killed but that may different to what you want to happen.