[Bug] Android back button doesnt work on .NET MAUI blazor app

[markosteger]

Description

i have created default .net maui blazor app and deployed it to my old Galaxy s6 running android 7. App works fine, but i simply can’t figure out how to make the device’s back button work.

Example: if i go to ‘Counter’ page it takes me to the page, but back button doesn’t take me back to where i started.

Or.. if i just open the app, back button doesnt close the app as i would expect.

Tried this only on Android 7 so i don't know if this also happens on other platforms or android versions.

Steps to Reproduce

1. Create new MAUI Blazor app
2. Build&Deploy
3. Go to page "Counter" generated by template
4. Pres back button

Expected Behavior

If we opened a 'Counter' page for example, the app should go one step back, otherwise App should exit

Actual Behavior

Nothing happens

Basic Information

• Version with issue:
• Last known good version: /
• IDE: Visaul Studio Comunnity 2022 Preview (17.0.0.0 Preview 4.1)
• Platform Target Frameworks: .NET 6 RC1
  • Android: 7 -->
• Nuget Packages:
• Affected Devices: Samsung Galaxy S6

Screenshots

Reproduction Link

Workaround

[peter-mghendi]

I'm having this same issue with both MAUI and MAUI Blazor. Back button/gesture does not close the app.

Basic Information

• Version with issue: MAUI Preview 8
• Last known good version: N/A
• IDE: Visual Studio Community 2022 Preview (17.0.0 Preview 4.1)
• Platform Target Frameworks: .NET 6 RC1
• Android: 11
• Nuget Packages: N/A
• Affected Devices: Samsung Galaxy A51

[Seanxwy]

When will the problem be fixed

[peter-mghendi]

Can confirm that this is fixed for me in the latest preview (preview 11).

[IIARROWS]

It's not fixed for me. It works for exiting the app, but not for going back in the page history.

I'm not even sure it's a good idea to allow that by default, the app may want to avoid the user to navigate back, it's not a web page after all. I think it should be controlled, and right now, it's not possible to avoid the navigation without some complex code. That's currently planned for .NET 7: dotnet/aspnetcore#14962

[TanayParikh]

Hey all, thanks for commenting!

Exiting the Android app will be handled via #3314.

Navigating the Blazor WebView (this issue) was handled via #4364.