Status bar customisation does not work in android.

[Eugenenoble2005]

Describe the bug

Attempting to customise the status bar natively does not work at all in avalonia. All techniques mentioned in https://developer.android.com do not work.

[Activity(
    Label = "Fuzzycord.Android",
    Theme = "@style/MyTheme.NoActionBar",
    Icon = "@drawable/icon",
    MainLauncher = true,
    ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.ScreenSize | ConfigChanges.UiMode)]
public class MainActivity : AvaloniaMainActivity<App>
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        View decorView = Window.DecorView;
        var uiOptions = decorView.WindowSystemUiVisibility;
        var newuioptions = uiOptions;
        newuioptions |=  SystemUiFlags.LayoutStable |  SystemUiFlags.LayoutFullscreen;
        decorView.SystemUiFlags = newuioptions;
        Window.SetStatusBarColor(Color.Red);
        base.OnCreate(savedInstanceState);
    }
    
    
}

It only works when AppCompatActivity is extended instead of AvaloniaMainActivity but then it wouldn't be an avalonia app anymore:

public class MainActivity : AppCompatActivity
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        View decorView = Window.DecorView;
        var uiOptions = decorView.WindowSystemUiVisibility;
        var newuioptions = uiOptions;
        newuioptions |=  SystemUiFlags.LayoutStable |  SystemUiFlags.LayoutFullscreen;
        decorView.SystemUiFlags = newuioptions;
        Window.SetStatusBarColor(Color.Red);
        base.OnCreate(savedInstanceState);
    }
    
    
}

To Reproduce

Create a new Avalonia xplat app and try to customise the android status bar whether through the style.xml, AndroidInset, AndroidSystemFlags, Window.SetSystemStatusBar color, EdgeToEdge, even Maui communityToolkit. No native apis will work if AvaloniaMainActivity is extended.

Expected behavior

Status bar should follow native styling

Avalonia version

11.0.9

OS

No response

Additional context

Android

[Eugenenoble2005]

Found a fix. Override OnWindowFocusChanged instead of OnCreate:

 public override void OnWindowFocusChanged(bool hasFocus)
    {  
        View decorView = Window.DecorView;
        var uiOptions = decorView.WindowSystemUiVisibility;
        var newuioptions = uiOptions;
        newuioptions |=  SystemUiFlags.LayoutStable |  SystemUiFlags.LayoutFullscreen;
        decorView.SystemUiFlags = newuioptions;
        Window.SetStatusBarColor(Color.Transparent);
        base.OnWindowFocusChanged(hasFocus);
    }

[maxkatz6]

Attempting to customise the status bar natively does not work at all in avalonia

You can use InsetsManager API for some customizations.