Runtime exception: Java.Lang.RuntimeException: Font asset not found Fonts/telerikfont.ttf, when trying to access any page with controls that use telerikfont, like AutoCompleteView, TreeView, etc.

If you have a project that has a dependency on: Xamarin.AndroidX.RecyclerView

It will cause a Release build failure due to Telerik.XamarinForms.DataControls using the wrong type in the renderer (AndroidX's RecyclerView instead of v7.Widgets's RecyclerView).

Here is the build error clarifying that it cannot find a `HasStableIds` property/method:

Error Mono.Linker.MarkException: Error processing method: 'System.Void Telerik.XamarinForms.DataControlsRenderer.Android.ItemsControlRenderer::OnElementAttached(Telerik.XamarinForms.DataControls.ItemsControl)' in assembly: 'Telerik.XamarinForms.DataControls.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve System.Void AndroidX.RecyclerView.Widget.RecyclerView/Adapter::set_HasStableIds(System.Boolean)

Reproduce

You can use the attached project to reproduce the problem. Be sure to have the following settings:

• Build in Release configuration
• Set LinkerBehavior to SDK assemblies Only

Workaround

Uninstall Xamarin.AndroidX.RecyclerView

I met an issue related to Xamarin.Forms RadListView (telerik component) which occurs only on iOS platform, while working fine on Android.
More details here - http://www.telerik.com/forums/radlistview-not-fitting-on-ios

Hello, 

Another important control is missing from your Control Suit. That is Rich Text Box control, same like one available from SyncFusion: https://www.syncfusion.com/xamarin-ui-controls/xamarin-richtexteditor

Please give us a rich text editor control like that. Thank you.

Add markers in line graph.

I have upgraded my Xamarin.Forms to version 4.5 and installed the dependent AndroidX nuget packages.  After upgrading UI for Xamarin to version 2020.1.318.1, I'm getting 3 errors below in my Xamarin Android project that seems to have to do with min SDK version when I try to build:

java/lang/String;Ljava/util/List;)[B :  invalid opcode ba - invokedynamic requires --min-sdk-version >= 26 (currently 13) 

com.android.dx.cf.code.SimException: ERROR in androidx.browser.customtabs.CustomTabsService$1.newSessionInternal:(Landroid/support/customtabs/ICustomTabsCallback;Landroid/app/PendingIntent;)Z: invalid opcode ba - invokedynamic requires --min-sdk-version >= 26 (currently 13)

com.android.dx.cf.code.SimException: ERROR in androidx.browser.trusted.ConnectionHolder.getServiceWrapper:()Lcom/google/common/util/concurrent/ListenableFuture;: invalid opcode ba - invokedynamic requires --min-sdk-version >= 26 (currently 13) 

I'm targeting Android 9 and set the minimum supported SDK to 26.  The error hasn't gone away.

I upgraded to latest Telerik to address a reference issue with AndroidX.RecyclerView but it seems that these new errors are showing up now. 

Is there something I can do to resolve the error or do I just have to wait for the next Telerik UI for Xamarin release?

Hi Team,

I implemented radcheckbox in my xamarin telerik application. In which i select checkbox and afterword i post some data through webAPI. After completion of posting data i got response from server and my app got crashed and show me following stack trace data,

  at Telerik.XamarinForms.PrimitivesRenderer.iOS.CheckBoxRenderer.OnElementDetached (Telerik.XamarinForms.Primitives.RadCheckBox oldElement) [0x00025] in <f3723b4c1d3f406496717d69142c8f84>:0 

  at Telerik.XamarinForms.Common.iOS.IosRendererBase`2[S,T].Dispose (System.Boolean disposing) [0x0001f] in <81c15264f2164ef79a02e84ed79e8bfd>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose (System.Boolean disposing) [0x0003f] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose () [0x00000] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x00058] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildRemoved (Xamarin.Forms.VisualElement view) [0x0003e] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildRemoved (System.Object sender, Xamarin.Forms.ElementEventArgs e) [0x0000f] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Element.OnChildRemoved (Xamarin.Forms.Element child) [0x00007] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:343 

  at Xamarin.Forms.VisualElement.OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:750 

  at Xamarin.Forms.Layout`1[T].OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in <4542de7f0f544d51b46d63bd15d5f6b5>:0 

  at Xamarin.Forms.Layout.OnInternalRemoved (Xamarin.Forms.View view) [0x00012] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:464 

  at Xamarin.Forms.Layout.InternalChildrenOnCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x0002b] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:427 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_NotifyCollectionChangedEventArgs(object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedAction action, System.Object item, System.Int32 index) [0x00009] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].RemoveItem (System.Int32 index) [0x00021] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.Collection`1[T].Remove (T item) [0x00027] in <939d99b14d934342858948926287beba>:0 

  at Xamarin.Forms.Layout.OnInternalAdded (Xamarin.Forms.View view) [0x0000b] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:451 

  at Xamarin.Forms.Layout.InternalChildrenOnCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00078] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:443 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_NotifyCollectionChangedEventArgs(object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedAction action, System.Object item, System.Int32 index) [0x00009] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

My xaml code,

<telerikControls:RadCheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" HorizontalOptions="Center" VerticalOptions="Center" />

My model class code,

private bool _isSelected;
        public bool IsSelected
        {
            get { return _isSelected; }
            set
            {
                _isSelected = value;
            }
        } 

Version information,

Xmarin form version : 4.1.0

Telerik UI version : 2019.2.802.1

iOS version 12.2

Please add support for ListViewCachingStrategy to the ListView. It's performance for large collection of items makes it unusable for production.

Please refer to this issue: https://feedback.telerik.com/xamarin/1509502-errors-with-latest-versions-of-androidx

In Selection Changed method SelectedSeries is always empty.

Is there other way to get which series is selected?

The "Scrolled" event is such a essential feature.

For example, i made a floating searchbar with transparent frame, and a RadListView with HeaderTemplate that is longer than a screen of the device, i would like to detect whether the listview has scrolled for more than 10px vertically. If yes, set the background of the frame of the searchbar to my desired color.Xamarin.Forms, collectionview, listview, and scrollview has Scrolled event, but why RadListView does not? Using ItemAppearing event is just avoiding the problem instead of solving it. It will not be able to fulfill the criteria as the any item does not even enter the screen yet before the required task need to be done.

We have yet to upgrade our mobile app to Xamarin Forms 4.x and the latest Telerik releases due to a hard crash in Android when we leave a page containing a Telerik ListView control.   

The exception seems to mirror what is discussed here:  https://www.telerik.com/forums/null-ref-error-iorderedtraversalcontroller-updatetraversalorder

Here is what we are seeing... what is the latest on addressing this error?   We need to upgrade from Xamarin Forms 3.6.x soon.

10-16 15:00:06.082 I/MonoDroid( 4686): UNHANDLED EXCEPTION:

10-16 15:00:06.084 I/MonoDroid( 4686): System.NullReferenceException: Object reference not set to an instance of an object.

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.PageRenderer.Xamarin.Forms.Platform.Android.IOrderedTraversalController.UpdateTraversalOrder () [0x000a4] in D:\a\1\s\Xamarin.Forms.Platform.Android\Renderers\PageRenderer.cs:186

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].UpdateParentPageTraversalOrder () [0x00025] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:402

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00116] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:366

10-16 15:00:06.084 I/MonoDroid( 4686):   at (wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:211

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:359

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.Element.set_Parent (Xamarin.Forms.Element value) [0x000e9] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:216

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.Element.OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:341

10-16 15:00:06.084 I/MonoDroid( 4686):   at Xamarin.Forms.ViewCell.set_View (Xamarin.Forms.View value) [0x00019] in D:\a\1\s\Xamarin.Forms.Core\Cells\ViewCell.cs:25

10-16 15:00:06.084 I/MonoDroid( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.ListView.CellContainerBase.Dispose (System.Boolean disposing) [0x00034] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.084 I/MonoDroid( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.084 I/MonoDroid( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.FormsListViewDataSourceAdapterBase.ClearCachedViews () [0x00023] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.ClearCachedViews () [0x00000] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.Dispose (System.Boolean disposing) [0x00003] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.ListViewRenderer.OnElementDetached (Telerik.XamarinForms.DataControls.RadListView oldElement) [0x00042] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Telerik.XamarinForms.Common.Android.AndroidRendererBase`2[S,T].Dispose (System.Boolean disposing) [0x0001f] in <14fbe24a55144e3caaf308ca594f4d5e>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311

10-16 15:00:06.085 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290

10-16 15:00:06.085 I/MonoDroid( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311

10-16 15:00:06.085 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290

10-16 15:00:06.085 I/MonoDroid( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311

10-16 15:00:06.085 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.PageRenderer.Dispose (System.Boolean disposing) [0x00024] in D:\a\1\s\Xamarin.Forms.Platform.Android\Renderers\PageRenderer.cs:53

10-16 15:00:06.085 I/MonoDroid( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at Xamarin.Forms.Platform.Android.AppCompat.FragmentContainer.OnDestroyView () [0x0003c] in D:\a\1\s\Xamarin.Forms.Platform.Android\AppCompat\FragmentContainer.cs:80

10-16 15:00:06.085 I/MonoDroid( 4686):   at Android.Support.V4.App.Fragment.n_OnDestroyView (System.IntPtr jnienv, System.IntPtr native__this) [0x00008] in <fefee6c2c695459088a9df092723e052>:0

10-16 15:00:06.085 I/MonoDroid( 4686):   at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.97(intptr,intptr)

10-16 15:00:06.088 E/AppCenterCrashes( 4686): Unhandled Exception from source=AndroidEnvironment

10-16 15:00:06.088 E/AppCenterCrashes( 4686): System.NullReferenceException: Object reference not set to an instance of an object.

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.PageRenderer.Xamarin.Forms.Platform.Android.IOrderedTraversalController.UpdateTraversalOrder () [0x000a4] in D:\a\1\s\Xamarin.Forms.Platform.Android\Renderers\PageRenderer.cs:186

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].UpdateParentPageTraversalOrder () [0x00025] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:402

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00116] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:366

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at (wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:211

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:359

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Element.set_Parent (Xamarin.Forms.Element value) [0x000e9] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:216

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Element.OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:341

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.ViewCell.set_View (Xamarin.Forms.View value) [0x00019] in D:\a\1\s\Xamarin.Forms.Core\Cells\ViewCell.cs:25

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.ListView.CellContainerBase.Dispose (System.Boolean disposing) [0x00034] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.FormsListViewDataSourceAdapterBase.ClearCachedViews () [0x00023] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.ClearCachedViews () [0x00000] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.RadListViewDataSourceAdapter.Dispose (System.Boolean disposing) [0x00003] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Telerik.XamarinForms.DataControlsRenderer.Android.ListViewRenderer.OnElementDetached (Telerik.XamarinForms.DataControls.RadListView oldElement) [0x00042] in <12ab8aad1d0a41af83f0de07840de122>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Telerik.XamarinForms.Common.Android.AndroidRendererBase`2[S,T].Dispose (System.Boolean disposing) [0x0001f] in <14fbe24a55144e3caaf308ca594f4d5e>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.Platform+DefaultRenderer.Dispose (System.Boolean disposing) [0x0000a] in D:\a\1\s\Xamarin.Forms.Platform.Android\Platform.cs:1290

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Java.Lang.Object.Dispose () [0x00000] in <11a340ccc8de43f09c97400139266ef5>:0

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x000c7] in D:\a\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:311

10-16 15:00:06.088 E/AppCenterCrashes( 4686):   at Xamarin.Forms.Platform.Android.PageRenderer.Dispose (System.Boolean disposing) [0x00024] in D:\a\1\s\Xamarin.Forms.Platform.Android\

It would be a good to have function to be able to swipe on the header and also to be able to swipe on the content area to go to next tab. 

This request is for iOS and Android

I would like to extend my XF project to Windows Presentation Framework (WPF) and MacOs when possible, both now supported by XF.

Request is that Telerik begin to include some work in these areas in its near-future roadmaps.

Following swipe gesture not fired

<telerikInput:RadCalendar.GestureRecognizers>
               <SwipeGestureRecognizer Swiped="SwipeGestureRecognizer_Swiped" Threshold="10"/>
 </telerikInput:RadCalendar.GestureRecognizers>

when swiping left or right swipe gesture should detect it.

or

when swiping on Multiday calendar add ability to decide swipe how many days back and forth (a property)

As the subject:

Before upgrading to the latest version of Telerik Controls, the Drag/Drop functionality worked correctly but after upgrading the list no longer updates and the item moved returns back to the original position.

Not using "ReorderEnded", everything works fine but this is needed to detect that something has been moved. 

When you work with mobile one of the major issues I have found is that the picker does not allow filtering so when you have more than a hundred of items the user can select on but you are displaying a thousand it’s kind of complicated, so a filtered picker would be awesome for developers that are working with Telerik controls

Add the ability to create a TablView without any header. This could be usful in case you want to host a few ContentView in each tab and change grammatically the select tab.

Also, a SelectedItemIndex property will be useful as well.

Thanks,
Mano

Xamarin.Forms library that allows to have for Google-Map-Like sliding panel from bottom of the screen.