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?
Since 2020.1.218 the NuGet package for UWP Apps doesn't work, it references files that are not found during build.
//
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
When using the __ItemStyle properties of RadListView, they are not being applied if the SelectionMode is set to None. It makes sense that the PressedItemStyle and SelectedItemStyle properties are not used, since they are not applicable if nothing can be selected. However, the ReorderItemStyle in particular should still be used.
Example:
public class ItemStyleNotAppliedExample : ContentPage
{
private readonly ListViewItemStyle WhiteBG = new ListViewItemStyle
{
BackgroundColor = Color.White
};
private readonly ListViewItemStyle YellowBG = new ListViewItemStyle
{
BackgroundColor = Color.Yellow
};
private readonly ListViewItemStyle RedBG = new ListViewItemStyle
{
BackgroundColor = Color.Red
};
private readonly ListViewItemStyle BlueBG = new ListViewItemStyle
{
BackgroundColor = Color.Blue
};
public ItemStyleNotAppliedExample()
{
BackgroundColor = Color.Gray;
var items = new ObservableCollection<Item>
{
new Item("Item 1"),
new Item("Item 2"),
new Item("Item 3"),
new Item("Item 4"),
new Item("Item 5"),
};
Content = new RadListView
{
SelectionMode = SelectionMode.None,
IsItemsReorderEnabled = true,
ItemsSource = items,
ItemTemplate = new DataTemplate(typeof(ItemView)),
ItemStyle = WhiteBG,
PressedItemStyle = YellowBG,
SelectedItemStyle = RedBG,
ReorderItemStyle = BlueBG,
};
}
private class Item
{
public string Name { get; }
public Item(string name)
{
Name = name;
}
}
private class ItemView : ListViewTemplateCell
{
public ItemView()
{
var checkbox = new CheckBox
{
VerticalOptions = LayoutOptions.Center
};
var label = new Label
{
VerticalOptions = LayoutOptions.Center
};
label.SetBinding(Label.TextProperty, nameof(Item.Name));
View = new StackLayout
{
BackgroundColor = Color.Transparent,
Orientation = StackOrientation.Horizontal,
Children =
{
checkbox,
label
}
};
}
}
}
When you have a page with RadCalendar and DayViewSettings properties are data-bound, navigating back in Prism raises a "Cannot destroy page" exception.
Hello,
RadPopup control causes memory leaks on iOS.
Here is the repro project https://github.com/VitalyKnyazev/RadPopupLeak
Thanks
Vitaly
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\
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
If we have a ListView with a CheckBox inside the ItemTemplate and the whole ListView is placed in a Popup control, following the next steps:
1. Open the popup
2. Check and uncheck the CheckBox control in any of the items.
3. Click into the popup and then outside to close it.
NullReferenceException is raised on iOS.
UPDATE:
The issue is confirmed to be in Xamarin.Forms framework. A fix is already provided. The Xamarin.Forms 4.3 version will contain the fix.
the following exceptions occur when upgrading to Xamarin.Forms v 4.0:
System.NotSupportedException: Unable to activate instance of type Telerik.XamarinForms.DataControlsRenderer.Android.ListView.TemplateCellContainer
System.NullReferenceException: Object reference not set to an instance of an object
at Telerik.XamarinForms.InputRenderer.iOS.SegmentedControlRenderer.OnElementDetached
Hi there,
We're struggeling with the radentry control. For login purposes we use one for the password and one for the email. When we set IsPassword=true this does show dots instead of words, but some basic stuff isn't working.
1) The normal entry with IsPassword=true does also hide the suggestion tab that is above the keyboard. We also tried hiding this with other settings but to no result. This control should also hide suggestions since it is a password and we don't want to cache this in any way.
2) When we replace the radentry password field with a xamarin entry password field (so set IsPassword=true on both) then we also get the password fill option. In this case Samsung keypass. I imagine if people are using autofillers such as samsung, google, or something else, that this should also work since i'm stating the field is a password field.
Tested on android with multiple devices.
Thanks in advance!
Martijn
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.
We can build on our personal development environments without issue. The issue is only on the Azure DevOps build server. We believe this to be related to a version incompatibility. Possibly the build server is attempting to reference an old library. We are seeing the issue on both iOS and Android builds.
This issue is well documented here:
https://www.telerik.com/forums/can%27t-resolve-the-reference-%27system-object#wNK1sRy19UOhttFJzbEshQ
Our version info:
- Build server is using Microsoft's hosted agent with Visual Studio for Mac 7.7.4.1 (attached file with all software installed on the host build-host-software.txt)
- App is on version 3.4.0+
- Referenced libraries use .NET Standard 1.6 and 2.0
- Xamarin.Forms app is hosted in a .NET Standard 2.0 library
Could we get a hold of an older compatible version of the software that can work with our version if there is no workable solution here ?
When trying to build the QSF example on GitHub, an error occurs due to The IHiearchyAdapter still being used in :
TreeView - First Look Example and Customizations Example.
The Error Message is Error CS0122: 'IHierarchyAdapter' is inaccessible due to its protection level (CS0122) (QSF)