[Bug] Incorrect CurrentActivity value after activities are destroyed and restored by the system

[sleushunou]

Description

Steps to Reproduce

In our application we have two activities, DialogActivity is opened on top of MainActivity. We use Settings -> Developer Options -> Don't Keep Activities turned ON to simulate system high load. While top activity (DialogActivity) is opened - minimize the app and then open it again.

Expected Behavior

Platform.CurrentActivity should return instance of DialogActivity

Actual Behavior

Platform.CurrentActivity returns instance of MainActivity

Basic Information

• Version with issue: 1.7.3
• Last known good version: no version, this bug reproduces also on CurrentActivityPlugin link
• IDE: VS for Mac/Rider
• Platform Target Frameworks:
  • Android: API 31
• Affected Devices: Android 10 Samsung Galaxy Note 9

Code snippet

Code: link
Logs: link
Looks like issue happens because paused activity also saved as current activity, which may override already resumed activity.

MainActivity.OnResume()
DialogActivity.OnResume()
MainActivity.OnPause()

void Application.IActivityLifecycleCallbacks.OnActivityPaused(Activity activity) { Activity = activity; Platform.OnActivityStateChanged(activity, ActivityState.Paused); }

Seems like we don't need to update Activity when OnPause called