Create a web doc page for lifecycles

[xster]

Would be nice to have a page dedicated to both internal flutter lifecycles and platform lifecycle events with diagrams.

The internal stuff is already at https://flutter.io/widgets-intro/#responding-to-widget-lifecycle-events. Could just re-summarize visually.

[Hixie]

The page is https://master-docs-flutter-io.firebaseapp.com/flutter/dart-ui/AppLifecycleState-class.html
We should definitely add suitable diagrams to that page though.

[sethladd]

Do we link to AppLifecycleState from /widgets-intro ?

[Hixie]

I don't know but we certainly should! :-)

[xster]

Might still be worth having an 'editorial'/'guide' style page like Android/iOS have in https://developer.apple.com/library/content/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/TheAppLifeCycle/TheAppLifeCycle.html, https://developer.android.com/guide/components/activities/activity-lifecycle.html besides the API references

[Sfshaza]

More correct link to API doc: https://docs.flutter.io/flutter/dart-ui/AppLifecycleState-class.html

[zoechi]

Issue moved to flutter/website #1987 via ZenHub

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.