Bug 52419 - Error in when OnAppearing for a page is called
Summary: Error in when OnAppearing for a page is called
Alias: None
Product: Forms
Classification: Xamarin
Component: Android ()
Version: 2.3.3
Hardware: Macintosh Mac OS
: High normal
Target Milestone: ---
Assignee: Samantha Houts [MSFT]
URL: https://github.com/Manne990/FormsOnAp...
Depends on:
Reported: 2017-02-09 12:34 UTC by Manne990
Modified: 2017-06-22 01:04 UTC (History)
5 users (show)

Tags: tabbedpage onappearing android ac
Is this bug a regression?: ---
Last known good build:

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Description Manne990 2017-02-09 12:34:37 UTC
Download this repo:

Run on Android device or emulator.

Do these steps:

1. Press the button "Next" a couple of times (OnAppearing calls is logged in the IDE output window).
2. Switch to the other tab (TAB 2)
3. Switch back to the first tab (TAB 1)
4. Now OnAppearing for all pages in the navigation stack is called instead of just the one on the top
5. Press the back button
6. No OnAppearing is called when moving back in the navigation stack

This bug is present only for Android when MainActivity inherits from Xamarin.Forms.Platform.Android.FormsApplicationActivity.
Comment 1 Paul DiPietro [MSFT] 2017-02-28 14:38:27 UTC
Thanks for the reproduction. Setting this to confirmed for now. There's another bug I know of that involves OnAppearing and TabbedPage but I think the behavior of this might be separate.
Comment 2 Samantha Houts [MSFT] 2017-06-08 17:13:42 UTC
Comment 3 Samantha Houts [MSFT] 2017-06-22 01:04:41 UTC
Should be fixed in 2.3.6-pre1. Thank you!