1. Home
  2. Forum
  3. Xamarin.Forms
  4. Unable to activate instance of type Syncfusion.SfPdfViewer.XForms.Droid.Runnable

Unable to activate instance of type Syncfusion.SfPdfViewer.XForms.Droid.Runnable

Hello,

This issue is happening for me with :

1. Syncfusion.Xamarin.SFPdfviewer (20.1.059) on Android in Xamarin Forms(5.0.0.2401).

2. Syncfusion.Xamarin.SFPdfviewer (18.1.0.4.8) on Android in Xamarin Forms(5.0.0.2401) (Your getting started project (https://github.com/syncfusion/xamarin-demos/tree/master/Forms/PdfViewer )


  • Unable to activate instance of type Syncfusion.SfPdfViewer.XForms.Droid.SfPdfViewerEx from native handle 0x7511e00bd4 (key_handle 0x40288d5).



I view a PDF close it and open another one and close it. Then repeat the steps again. I get these errors on Android Device(Xamarin Forms Project):


Unable to activate instance of type Syncfusion.SfPdfViewer.XForms.Droid.Runnable from native handle 0x7fe3422564 (key_handle 0xd06dd49).

at Java.Interop.TypeManager.CreateInstance (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type targetType) [0x0014f] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:313

at Java.Lang.Object.GetObject (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type type) [0x00023] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:304

at Java.Lang.Object._GetObject[T] (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00017] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:290

at Java.Lang.Object.GetObject[T] (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00000] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:281

at Java.Lang.Object.GetObject[T] (System.IntPtr jnienv, System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00006] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:275

at Java.Lang.IRunnableInvoker.n_Run (System.IntPtr jnienv, System.IntPtr native__this) [0x00000] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-31/mcw/Java.Lang.IRunnable.cs:83

at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.54(intptr,intptr)


______


"No constructor found for Syncfusion.SfPdfViewer.XForms.Droid.Runnable::.ctor(System.IntPtr, Android.Runtime.JniHandleOwnership)"



Please advise.


8 Replies
VD Vikram Devaraj Syncfusion Team June 15, 2022 02:04 PM UTC

Hi Muona, 


Greetings from Syncfusion support, 


We were unable to reproduce your reported error and it is working as expected. Could you please see the attached video and let us know whether we have missed out anything while replicating the issue. 

  

Kindly share the following details to analyze more on this issue and assist you with the better solution   

1..Replication video/procedure to reproduce the issue. 

2. Device information.

3. PDF document (If you change in that sample)


Regards, 

Vikram


Attachment: Video_657aa298.zip

JO Johan June 29, 2022 12:38 PM UTC

We also have this issue. I could reproduce it with opening the pdf and while scrolling quickly closing the window. So the scroll view moves and then close the view. But also just opening and closing the pdf view a few times will cause the error after like 5 times.


Syncfusion.Xamarin.SFPdfviewer (20.1.056) on Android in Xamarin Forms(5.0.0.2401).


Galaxy S10e with Android 12 for example


System.NotSupportedException: Unable to activate instance of type Syncfusion.SfPdfViewer.XForms.Droid.Runnable from native handle 0x7ffb93f9d8 (key_handle 0xca30fa6). ---> System.MissingMethodException: No constructor found for Syncfusion.SfPdfViewer.XForms.Droid.Runnable::.ctor(System.IntPtr, Android.Runtime.JniHandleOwnership) ---> Java.Interop.JavaLocationException: Exception of type 'Java.Interop.JavaLocationException' was thrown.

  at Java.Lang.Error: Exception of type 'Java.Lang.Error' was thrown.

  at java.lang.Error: Java callstack:

  at at crc64f0d106695cb1f69e.Runnable.n_run(Native Method)

  at at crc64f0d106695cb1f69e.Runnable.run(Runnable.java:30)

  at at android.os.Handler.handleCallback(Handler.java:938)

  at at android.os.Handler.dispatchMessage(Handler.java:99)

  at at android.os.Looper.loopOnce(Looper.java:226)

  at at android.os.Looper.loop(Looper.java:313)

  at at android.app.ActivityThread.main(ActivityThread.java:8663)

  at at java.lang.reflect.Method.invoke(Native Method)

  at at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:567)

  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135)

  --- End of inner exception stack trace ---

  at Java.Interop.TypeManager.CreateProxy (System.Type type, System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00096] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:342

  at Java.Interop.TypeManager.CreateInstance (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type targetType) [0x0010c] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:306

  --- End of inner exception stack trace ---

  at Java.Interop.TypeManager.CreateInstance (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type targetType) [0x0014f] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:313

  at Java.Lang.Object.GetObject (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type type) [0x00023] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:304

  at Java.Lang.Object._GetObject[T] (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00017] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:290

  at Java.Lang.Object.GetObject[T] (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00000] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:281

  at Java.Lang.Object.GetObject[T] (System.IntPtr jnienv, System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00006] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:275

  at Java.Lang.IRunnableInvoker.n_Run (System.IntPtr jnienv, System.IntPtr native__this) [0x00000] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-31/mcw/Java.Lang.IRunnable.cs:83

  at at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.6(intptr,intptr)



JO Johan June 29, 2022 01:26 PM UTC

I was able to reproduce it with the sample (https://github.com/syncfusion/xamarin-demos/tree/master/Forms/PdfViewer ) :


1) scroll in the getting started tab

2) while the page is still scrolling, tab the custom toolbar tab


System.NotSupportedException: Unable to activate instance of type Syncfusion.SfPdfViewer.XForms.Droid.Runnable from native handle 0xffb281e4 (key_handle 0x32e0c40). ---> System.MissingMethodException: No constructor found for Syncfusion.SfPdfViewer.XForms.Droid.Runnable::.ctor(System.IntPtr, Android.Runtime.JniHandleOwnership) ---> Java.Interop.JavaLocationException: Exception of type 'Java.Interop.JavaLocationException' was thrown.

  at Java.Lang.Error: Exception of type 'Java.Lang.Error' was thrown.

  at java.lang.Error: Java callstack:

  at at crc64f0d106695cb1f69e.Runnable.n_run(Native Method)

  at at crc64f0d106695cb1f69e.Runnable.run(Runnable.java:30)

  at at android.os.Handler.handleCallback(Handler.java:938)

  at at android.os.Handler.dispatchMessage(Handler.java:99)

  at at android.os.Looper.loopOnce(Looper.java:226)

  at at android.os.Looper.loop(Looper.java:313)

  at at android.app.ActivityThread.main(ActivityThread.java:8663)

  at at java.lang.reflect.Method.invoke(Native Method)

  at at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:567)

  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135)

  --- End of inner exception stack trace ---

  at Java.Interop.TypeManager.CreateProxy (System.Type type, System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00096] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:342

  at Java.Interop.TypeManager.CreateInstance (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type targetType) [0x0010c] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:306

  --- End of inner exception stack trace ---

  at Java.Interop.TypeManager.CreateInstance (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type targetType) [0x0014f] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:313

  at Java.Lang.Object.GetObject (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer, System.Type type) [0x00023] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:304

  at Java.Lang.Object._GetObject[T] (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00017] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:290

  at Java.Lang.Object.GetObject[T] (System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00000] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:281

  at Java.Lang.Object.GetObject[T] (System.IntPtr jnienv, System.IntPtr handle, Android.Runtime.JniHandleOwnership transfer) [0x00006] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Object.cs:275

  at Java.Lang.IRunnableInvoker.n_Run (System.IntPtr jnienv, System.IntPtr native__this) [0x00000] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-29/mcw/Java.Lang.IRunnable.cs:83

  at at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.26(intptr,intptr)



Attachment: Screen_Recording_20220629150310_One_UI_Home.mp4_6f232ddc.zip

JO Johan replied to Vikram Devaraj June 30, 2022 06:07 AM UTC

I have supplied everything you requested, but if you need any more info, let me know.


RG RameshBabu Ganesan Syncfusion Team June 30, 2022 02:01 PM UTC

Hi Johan,

Greetings from Syncfusion support, 

We are able to reproduce the issue "Application crashes While scrolling and switching tabs in Sample Browser". We will validate the issue and will provide the details on July 04, 2022


Regards, 

Ramesh



VD Vikram Devaraj Syncfusion Team July 4, 2022 01:47 PM UTC

Hi Johan,


We have confirmed that the issue “Application crashes While scrolling and switching tabs in Sample Browser” is a defect and logged a defect report for this issue. The patch for this issue will be delivered on July 25 , 2022.  

  

Please find the feedback link below,  
https://www.syncfusion.com/feedback/36105/android-application-crashes-while-scrolling-and-switching-tabs-in-sample-browser


Regards,
Vikram


VD Vikram Devaraj Syncfusion Team July 25, 2022 12:44 PM UTC

Hi ,

We have resolved the reported issue “Application crashes While scrolling and switching tabs in Sample Browser ”and the custom NuGet for the same can be downloaded from the attached file.

Disclaimer: Please note that we have created this NuGet for 20.2.0.39 version specifically to resolve the following issue reported in this forum 175632


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 volume 2 - Service Pack release, which is expected to be available by August 2022


Regards,
Vikram


Attachment: syncfusion.xamarin.sfpdfviewer.20.2.0.39._F175632_da1e3936.zip

JO Johan August 17, 2022 09:48 AM UTC

Thank you, I can confirm the issue is fixed in 20.2.0.39


Loader.
Up arrow icon