Object reference not set to an instance of an object at Syncfusion.SfPdfViewer.XForms.Droid.ScrollViewEx.SignatureCanvas_ConfirmationButtonClicked

[Palmy Code]

Hi all !!

I'm getting this error only on Android when I click on "DONE" button on the signature pad. I researched that this error I started getting after implementing framework Mvvmcross.Forms.

Steps to reproduce:

1) Load the app.

2) Click "Sign" button at the bottom.

3) Draw any signature.

4) Click "Done" button.

The next error occurred:

System.NullReferenceException: Object reference not set to an instance of an object. at Syncfusion.SfPdfViewer.XForms.Droid.ScrollViewEx.SignatureCanvas_ConfirmationButtonClicked (System.Object sender, System.EventArgs e) [0x00057] in <5412a555be57485f910e2eb59f4b1038>:0 at Syncfusion.SfPdfViewer.XForms.Droid.SignaturePad.DoneButton_Click (System.Object sender, System.EventArgs e) [0x0014d] in <5412a555be57485f910e2eb59f4b1038>:0 at Android.Views.View+IOnClickListenerImplementor.OnClick (Android.Views.View v) [0x0000a] in /Users/builder/azdo/_work/278/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-29/mcw/Android.Views.View.cs:2258 at Android.Views.View+IOnClickListenerInvoker.n_OnClick_Landroid_view_View_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_v) [0x00010] in /Users/builder/azdo/_work/278/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-29/mcw/Android.Views.View.cs:2227 at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.40(intptr,intptr,intptr)

P.s. don't forget to put a valid license key.

Attachment: SfSignatureExample_report_7e361b32.zip

[Vikram Devaraj]

  

Hi Palmy, 

 

Greetings from Syncfusion support, 

 

We were able to reproduce the issue, “Application crashes with exception while adding signature using signaturePad” . Currently, we are validating this issue and we will update the further details on July 22, 2021. 

 

Regards, 

Vikram D

 

[Palmy Code]

Hi Vikram,

Thanks for the reply.

I also got the same issue when I tried to add FreeTextAnnotation.

Attachment: SfSignatureExample_report_8fb9e8.zip

[Vikram Devaraj]

Hi Palmy, 

 

You are most welcome.

 

We were able to reproduce the issue, “Application crashes with exception while adding FreeText annotation” . Currently, we are validating both issues and we will update the further details on July 22, 2021. 

 

Regards, 

Vikram D

 

[Vikram Devaraj]

Hi Palmy, 

Sorry for the inconvenience caused. We are still validating the issue, “Application crashes with exception while adding signature using signaturePad and  FreeText annotation” due to the complexity of the issue. We will update the further details on July 26, 2021.


Regards,
Vikram D  

[Vikram Devaraj]

Hi Palmy,   

    

We have confirmed that the issue “Application crashes with exception while adding signature using signaturePad and  FreeText annotation” is a defect and logged a defect report for this issue. The patch for this issue will be delivered on August 16, 2021.   

   

Please find the feedback link below,   

https://www.syncfusion.com/feedback/27349/androidapplication-crashes-with-exception-while-adding-signature-using 

    

Regards,   

Vikram D

[Vikram Devaraj]

Hi Palmy,


 

We have resolved the issues “Application crashes with exception while adding signature using signaturePad and  FreeText annotation” and the custom NuGet for the same can be downloaded from the following link.    

        

Custom NuGet :      https://www.syncfusion.com/downloads/support/directtrac/general/ze/CustomNuget_167333630203483.zip 

       

Disclaimer: Please note that we have created this NuGet for version 19.2.0.47 specifically to resolve the following issue reported in this forum 167333. 

      

Note : Kindly follow the steps to clear the NuGet cache and then install patched NuGet to get the issue resolved.       

        

https://www.syncfusion.com/kb/6987/how-to-clear-nuget-cache         

           

This fix will be included in our 2021 Volume 3 Main release which is expected to available in the month of September, 2021 

 

Regards,    

Vikram D