[Android 10+] OnActivated not called. App lifecycle with Deeplink flow

[vincentcastagna]

Current behavior

This issue has been identified on Android 10+ (11) devices, it seems like its not behaving the same on Android 7,8 and 9.

Giving scenario when an email is sent to the device with a deeplink to an application :

1. App put OnPause through back button on android

   • OnPause() hit in MainActivity
   • Go to email client, click on deeplink
   • OnActivated() called, and then OnResume()
   • Deeplink handling is OK

2. App put OnPause through home button

   • OnPause() hit in MainActivity
   • Go to email client, click on deeplink
   • OnRestart() called, and then OnResume()
   • OnActivated() is not called at all
   • Deeplink handling not ok (as we do not reach OnActivated())

Note : On Android 7,8,9 it seems like OnActivated() is called between OnRestart() and OnResume(), explaining why it works every time.

Also, seems like giving a certain amount of time, we hit theOnActivated()method on Android 10, but it's random and inconsistent, I didn't find a real flow to reproduce this. Sometimes it is called, sometimes not

Expected behavior

Given scenario 2 should behave the same as 1 and call OnActivated(). It seems like because OnRestart() is called in the second flow, it takes precedence on OnActivated().

Workaround

• None at the moment ...

Environment

Nuget Package:

• Uno.UI - 3.1.0-beta.76
• Uno.SourceGenerationTasks - 3.0.0-dev.78

Affected platform(s):

• Android 10+

IDE:

• Visual Studio 2019 (version: 16.8.4 )

[andreaSflores18]

The issue seems to occur on Android 11 as well.

[MartinZikmund]

This works, the PR is not required to resolve the problem.