Empty SfChart crashes on Android: specified cast is not valid

[Gianluca Esposito]

I'm using a SfChart control in my Xamarin Forms project (release 15.3.0.33 with Xamarin.Forms 2.4.0.282).
Just using an empty SfChart control it crashes during BaseInitialize as shown in stack trace.
Any suggestions?

Specified cast is not valid.

• 1
  SfChart.BaseInitialize ()
• 2
  ChartBase.Initialize ()
• 3
  Com.Syncfusion.Charts.ChartBase..ctor (Android.Content.Context context) [0x0001a] in <35869240bce84637ac78aeb02a512071>:0
• 4
  Com.Syncfusion.Charts.SfChart..ctor (Android.Content.Context context) [0x00000] in <35869240bce84637ac78aeb02a512071>:0
• 5
  Syncfusion.SfChart.XForms.Droid.SfChartExt..ctor (Android.Content.Context context) [0x00000] in <35869240bce84637ac78aeb02a512071>:0
• 6
  SfChartRenderer.GetNativeChart (Syncfusion.SfChart.XForms.SfChart sfChart)
• 7
  SfChartRenderer.OnElementChanged (Xamarin.Forms.Platform.Android.ElementChangedEventArgs`1[TElement] e)
• 8
  VisualElementRenderer`1[TElement].SetElement (TElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:171
• 9
  IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:120
• 10
  Platform.CreateRenderer (Xamarin.Forms.VisualElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\Platform.cs:285
• 11
  VisualElementPackager.AddChild (Xamarin.Forms.VisualElement view, Xamarin.Forms.Platform.Android.IVisualElementRenderer oldRenderer, Xamarin.Forms.Platform.Android.RendererPool pool, System.Boolean sameChildren) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:86
• 12
  VisualElementPackager.SetElement (Xamarin.Forms.VisualElement oldElement, Xamarin.Forms.VisualElement newElement) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:219
• 13
  VisualElementPackager.Load () C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:70
• 14
  VisualElementRenderer`1[TElement].SetPackager (Xamarin.Forms.Platform.Android.VisualElementPackager packager) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:371
• 15
  VisualElementRenderer`1[TElement].SetElement (TElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:174
• 16
  IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:120
• 17
  Platform.CreateRenderer (Xamarin.Forms.VisualElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\Platform.cs:285
• 18
  VisualElementPackager.AddChild (Xamarin.Forms.VisualElement view, Xamarin.Forms.Platform.Android.IVisualElementRenderer oldRenderer, Xamarin.Forms.Platform.Android.RendererPool pool, System.Boolean sameChildren) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:86
• 19
  VisualElementPackager.SetElement (Xamarin.Forms.VisualElement oldElement, Xamarin.Forms.VisualElement newElement) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:219
• 20
  VisualElementPackager.Load () C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementPackager.cs:70
• 21
  VisualElementRenderer`1[TElement].SetPackager (Xamarin.Forms.Platform.Android.VisualElementPackager packager) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:371
• 22
  VisualElementRenderer`1[TElement].SetElement (TElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:174
• 23
  IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:120
• 24
  Platform.CreateRenderer (Xamarin.Forms.VisualElement element, Android.Support.V4.App.FragmentManager fragmentManager) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\Platform.cs:322
• 25
  FragmentContainer.OnCreateView (Android.Views.LayoutInflater inflater, Android.Views.ViewGroup container, Android.OS.Bundle savedInstanceState) C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\AppCompat\FragmentContainer.cs:67
• 26
  Fragment.n_OnCreateView_Landroid_view_LayoutInflater_Landroid_view_ViewGroup_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_inflater, System.IntPtr native_container, System.IntPtr native_savedInstanceState)
• 27
  (wrapper dynamic-method) System.Object:0dfcc65f-a4a6-4efb-b62e-de762ac1b4f4 (intptr,intptr,intptr,intptr,intptr)

[Parthiban Sundaram]

Hi Gianluca,

Sorry for the inconvenience caused.

Due to internal architecture change, now, it is not required to add Syncfusion.SfChart.Android.dll and Syncfusion.SfChart.iOS.dll assemblies to your platform specific projects such as Android and iOS in Xamarin.Forms respectively. Hence, you need to remove these two assemblies from your platform specific projects.

Please make sure that the following highlighted SfChart assemblies are only referred in your application.

 

Release notes: https://help.syncfusion.com/xamarin/release-notes/v15.3.0.26?type=all#breaking-changes  

UG: https://help.syncfusion.com/xamarin/introduction/control-dependencies  

Note: Clean and Rebuild the projects after remove the assemblies.

Please let us know, if you need further assistance on this.

Regards,
Parthiban S
 

[Gianluca Esposito]

Everything works fine!

Thank you very much

[Parthiban Sundaram]

Hi Gianluca,

Thanks for the update. We are glad that the given solution has helped to resolved the issue. Please let us know, if you need further assistance on this.

Regards,
Parthiban S

[elbrinner]

Hello,

I'm having the same problem with the android version and I do not see the problem. Can you help me? My code is this:

https://github.com/elbrinner/curso-introduccion-xamarin-forms-2018-XamarinMadrid/tree/master/XamarinMadrid2018/Fin

Selecting an item from the list fails in android when painting the graphic.

Thank you

[Michael Prabhu M]

Hi Elbrinner,   

   

Greetings from Syncfusion, we have analyzed your sample and the reported issue occurs since you have added "Syncfusion.Xamarin.SfChart.Android" assembly in the Xamarin.Forms.Android project which is not necessary. "Syncfusion.Xamarin.SfChart.Android" is for Xamarin.Android and not for Forms. 

Similarly, for iOS as well. 

   

Please refer the below screenshot for better understanding of the assemblies required in Xamarin.Forms.Android   

   

Screenshot:   

     

   

Also, we have prepared a simple sample for your reference and it can be downloaded from the link below.   

   

Sample: http://files2.syncfusion.com/Xamarin.Forms/Samples/Chart_GettingStarted.zip    

   

Thanks,   

Michael   

[elbrinner]

It works for me Remove the library and clean.

On Saturday I will use 2 syncfusion components in a mini introductory course to Xamarin Forms.

Thank you

[Michael Prabhu M]

Hi Elbrinner,  

  

Glad! we could help. Feel free to contact us anytime if you need any other assistance from us. We are happy to help you.   

  

Thanks,  

Michael  

 

[OTG Informatica srl]

WHY DON'T YOU REMOVE THEM FROM NUGET IF THEY ARE USELESS!!!??

[Rachel A]

Hi OTG Informatica, 

  

The “Syncfusion.Xamarin.SfChart.Android” NuGet package is used for Xamarin.Android platform. Hence, we cannot remove this NuGet. 

  

Thanks, 

Rachel.