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When the application sleep by changing to another application or loading the phone gallery, it calls OnStart instead OnResume, this issue was detected testing in Android 6.0.1 (Galaxy S7 Edge). I tried in some other phones but only 1 presented this issue.
The MainActivity has "ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation" as shown below:
[Activity(Label = "Climbapp.Droid", Icon = "@drawable/icono", ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
Thank you for taking the time to submit the bug. We are unable to reproduce this issue. Please attach a reproduction to the bug by starting with a clean Xamarin.Android project and adding just the code necessary to demonstrate the issue.
Not sure if this belongs here since this is for Xamarin.Android, but here goes.
I just encountered this on Xamarin.Forms 18.104.22.1686-pre6 .
I tested this by creating a new Xamarin.Forms project, adding debug messages in every method, plus an alert in OnResume().
OnResume() works normally on an Android 7.0 phone, the 6.0.1 Visual Studio emulator and on the iOS 10.3 emulator, but doesn't on my Android 5.0.1 device.
OnStart() gets called instead.
If I'm not mistaken, stable 22.214.171.124 works correctly only on iOS, calling OnStart() every time I tested it on any Android related device, real or not.
(In reply to espilioto from comment #3)
> Not sure if this belongs here since this is for Xamarin.Android, but here
> I just encountered this on Xamarin.Forms 126.96.36.1996-pre6 .
> I tested this by creating a new Xamarin.Forms project, adding debug messages
> in every method, plus an alert in OnResume().
> OnResume() works normally on an Android 7.0 phone, the 6.0.1 Visual Studio
> emulator and on the iOS 10.3 emulator, but doesn't on my Android 5.0.1
> OnStart() gets called instead.
> If I'm not mistaken, stable 188.8.131.52 works correctly only on iOS, calling
> OnStart() every time I tested it on any Android related device, real or not.
This most likely belongs in a Xamarin.Forms bug. If they decide it's an Android issue, they can change the product category in Bugzilla. The lifecycle methods mapped to the Xamarin.Forms ones do not 1:1 match with the Android ones IIRC.
Because we have not received a reply to our request for more information we are closing this issue. If you are still encountering this issue, please reopen the ticket with the requested information. Thanks!