Xamarin Forms Android Surface Duo: System.NullReferenceException at PlatformConfigurationExtensions.OnThisPlatform

Brent Esh 1

I'm getting this error on Surface Duo devices only (Android 11, not reproducible, just got a few crash logs). Any ideas what could be causing this?

PlatformConfigurationExtensions.OnThisPlatform[T] (T element)
System.NullReferenceException: Object reference not set to an instance of an object

PlatformConfigurationExtensions.OnThisPlatform[T] (T element)
FragmentContainer.OnPause ()
Fragment.n_OnPause (System.IntPtr jnienv, System.IntPtr native__this)
(wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.129(intptr,intptr)

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 39,391 Reputation points Microsoft Vendor

2022-07-19T07:27:27.6+00:00

There are many causes of System.NullReferenceException: Object reference not set to an instance of an object, you could refer to NullReferenceException Class to get more detailed information.

Could you please provide minimal code needed to reproduce the problem needed to reproduce the problem and exact reproducing steps, expected behavior, and how does that differs from the actual behavior?

It would be helpful for us to find the real reason.
Brent Esh 1 Reputation point

2022-07-19T08:37:50.6+00:00
Hello,
I am getting this on a crash log - I have not been able to reproduce it at all so it makes it quite difficult to send steps or a minimal project.
I was hoping you might just have some tips or ideas based on the callstack - or I could provide specific code files if that would help (MainActivity.cs, etc.).

I'm sorry that I don't have more info, that's part of what made it difficult for us to debug - our code does not appear in the callstack at all and I have not been able to reproduce it.

Thanks

Brent
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 39,391 Reputation points Microsoft Vendor

2022-07-20T06:19:10.2+00:00

I'm getting this error on Surface Duo devices only (Android 11, not reproducible, just got a few crash logs).

Does this only happen on the Surface Duo? If so, you could create a new issue at surface-duo-sdk-issues.

As the documentation NullReferenceException says, there are many reasons for the NullReferenceException, therefore, we cannot conduct further analysis without specific code.

You could refer to What is a NullReferenceException, and how do I fix it?, here's a detailed guide on how to handle NullReferenceException.
Brent Esh 1 Reputation point

2022-07-20T06:44:42.83+00:00

OK, I'll do that
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 39,391 Reputation points Microsoft Vendor

2022-07-25T08:23:37.097+00:00

Thank you for your cooperation.:)

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Xamarin Forms Android Surface Duo: System.NullReferenceException at PlatformConfigurationExtensions.OnThisPlatform