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PdfViewer crash during on Android during Unload

Thread ID:





131649 Jul 20,2017 11:06 PM Jun 6,2018 03:16 AM Xamarin.Forms 3
Tags: PdfViewer
Asked On July 20, 2017 11:24 PM

Hi Support:I have a page which has many links to open a different pdf file.  I got errors randomly errors after doing the Unload, but always happen.{System.NullReferenceException: Object reference not set to an instance of an object.  at Syncfusion.SfPdfViewer.XForms.Droid.ScrollViewEx.RemoveAllInstances () [0x00004] in :0   at Syncfusion.SfPdfViewer.XForms.Droid.ScrollViewEx.Unload (System.Boolean isDisposeCompletely) [0x00073] in :0   at Syncfusion.SfPdfViewer.XForms.Droid.ScrollViewEx.Unload () [0x00000] in :0   at Syncfusion.SfPdfViewer.XForms.Droid.PdfDependencyServices.Unload (System.Object nativeObject) [0x00000] in :0   at Syncfusion.SfPdfViewer.XForms.SfPdfViewer.Unload () [0x0000c] in :0  Also I would like to know If the user is going to open different files (one at the time), should I call the Unload before a opening a new file ?Thank inadvancedDavid

Sathish Sivakumar [Syncfusion]
Replied On July 24, 2017 08:42 AM

Hi David, 
Thank you for using Syncfusion products. 
We were able to reproduce the issue at our end. A support incident to track the status of this defect has been created under your account. Please log on to our support website to check for further updates  
Please let me know if you have any questions.   

Silvano Babini
Replied On June 5, 2018 05:00 AM

Hi support,

Any update to this bug, i'm not able to use your plugin due to the crash of app unloading the ContentPage. (only if pdf is showed in a scrollview)
I got this error:

CountDownTimerEx.OnTick (System.Int64 millisUntilFinished)

System.ObjectDisposedException: Cannot access a disposed object. Object name: 'Syncfusion.SfPdfViewer.XForms.Droid.ScrollViewEx'.

  • 1
    JniPeerMembers.AssertSelf (Java.Interop.IJavaPeerable self)
  • 2
    JniPeerMembers+JniInstanceMethods.InvokeNonvirtualInt32Method (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
  • 3
    View.get_ScrollY ()
  • 4
    CountDownTimerEx.OnTick (System.Int64 millisUntilFinished)
  • 5
    CountDownTimer.n_OnTick_J (System.IntPtr jnienv, System.IntPtr native__this, System.Int64 millisUntilFinished)
  • 6
    (wrapper dynamic-method) System.Object.5f69dcd6-f9c9-4e0a-a4c0-b3836ecde1e5(intptr,intptr,long)

Navaneetha Kannan Sudalai Muthu [Syncfusion]
Replied On June 6, 2018 03:16 AM

Hi Silvano,   

The issue “ObjectDisposedException occurs in PdfViewer when unloading ContentPage” has been fixed and the fix will be included in our Essential Studio 2018 Volume 2 release which is expected to be available in June 2018.   

If you need the fix earlier than the public release kindly create a support incident under you Direct-Trac account.   

Navaneetha Kannan   


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