Approved
Last Updated: 09 Aug 2019 09:54 by ADMIN
Java.Lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

For example change the IsPullToRefreshEnabled state on button click, when button is pressed several times, exception is throw.
Declined
Last Updated: 08 Aug 2019 11:58 by ADMIN
Created by: Anthony
Comments: 3
Category: ListView
Type: Bug Report
0

Hi,

As the header suggests, Swipe No Longer Works When Offset And Threshold Are Equal, the swipe closes on finger release. This started happening in the latest release, 2019.2.619.1, previously this worked without issue.

This can be replicated in the SDKBrowser by setting the following in Cell Swipe - Interactive Content example:

SwipeOffset="70, 0, 0, 0"
SwipeThreshold="70"

I have only tested this on Android. 

Regards

Anthony 

 

Approved
Last Updated: 01 Aug 2019 14:52 by ADMIN
Created by: Afi
Comments: 0
Category: ListView
Type: Feature Request
1
Expose GroupHeaderTemplate Selector property as ItemTemplateSelector property
Approved
Last Updated: 29 Jul 2019 13:18 by ADMIN
ADMIN
Created by: Nikolay
Comments: 3
Category: ListView
Type: Bug Report
4
This can be reproduced in the SDK examples ->ListView -> Gestures -> CellSwipeEvents. 
1. Change the content of the items so that they have uneven height
2. Scroll down 
3. Delete an item by swiping
-> Expected result : The items re-arrange correctly
-> Actual result : The item is deleted but the ListView is scrolled up when the UI is updated
Completed
Last Updated: 23 Jul 2019 05:09 by ADMIN
Release 2019.2.708 (R2 2019 minor release)

When RadListView is placed inside a TabViewItem content of the RadTabView control,  it does not preserve its SelectedItem, scroll position and expanded items (if it is grouped).
			
Approved
Last Updated: 22 Jul 2019 12:29 by ADMIN
When using DataTemplates on the ListView for Android, items are constantly redrawn when data shown on the template is updated, this is obvious to the user as it flashes and doesn't look great. Note that the native ListView does not do this.
Pending Review
Last Updated: 18 Jul 2019 16:47 by ADMIN

Hi,

I rolled my app with the ListView out to production and are getting 8+ crashes a day from 140 users with the above issue. I have included a stack trace. I cannot find the steps to reproduce the issue in development. I have rolled back to using the native ListView as this does not crash the app.

Attached is an example project to see what I am doing in general terms, but I have not been able to reproduce this crash in it.

My guess is that a DataTemplate is not being cleaned up properly and when the data behind is changed it attempts to access the control that represented the data in the DataTemplate.

Regards
Anthony

Xamarin caused by: android.runtime.JavaProxyThrowable: System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'Android.Support.V7.Widget.SwitchCompat'.
Java.Interop.JniPeerMembers.AssertSelf(IJavaPeerable self)<9cb01525c8ce48268eb7a54e1b653d67>:0
Java.Interop.JniPeerMembers.JniInstanceMethods.InvokeVirtualVoidMethod(string encodedMember, IJavaPeerable self, JniArgumentValue* parameters)<9cb01525c8ce48268eb7a54e1b653d67>:0
Android.Widget.CompoundButton.set_Checked(bool value)<83e36ed05052486983583851de96589e>:0
Xamarin.Forms.Platform.Android.AppCompat.SwitchRenderer.HandleToggled(object sender, EventArgs e)<e6fe81c4055a4db5bd435b7d12d894e3>:0
at Xamarin.Forms.Switch+<>c.<.cctor>b__14_0 (Xamarin.Forms.BindableObject bindable, System.Object oldValue, System.Object newValue) [0x0001c] in <209f66ed8fe04cb6a815feb8c3b62471>:0
Xamarin.Forms.BindableObject.SetValueActual(BindableProperty property, BindableObject.BindablePropertyContext context, object value, bool currentlyApplying, SetValueFlags attributes, bool silent)<209f66ed8fe04cb6a815feb8c3b62471>:0
Xamarin.Forms.BindableObject.SetValueCore(BindableProperty property, object value, SetValueFlags attributes, BindableObject.SetValuePrivateFlags privateAttributes)<209f66ed8fe04cb6a815feb8c3b62471>:0
Xamarin.Forms.BindingExpression.ApplyCore(object sourceObject, BindableObject target, BindableProperty property, bool fromTarget)<209f66ed8fe04cb6a815feb8c3b62471>:0
Xamarin.Forms.BindingExpression.Apply(bool fromTarget)<209f66ed8fe04cb6a815feb8c3b62471>:0
Xamarin.Forms.BindingExpression.BindingExpressionPart.<PropertyChanged>b__49_0()<209f66ed8fe04cb6a815feb8c3b62471>:0
Java.Lang.Thread.RunnableImplementor.Run()<83e36ed05052486983583851de96589e>:0
Java.Lang.IRunnableInvoker.n_Run(IntPtr jnienv, IntPtr native__this)<83e36ed05052486983583851de96589e>:0
at (wrapper dynamic-method) System.Object.31(intptr,intptr)
mono.java.lang.RunnableImplementor.n_run(Native Method)
mono.java.lang.RunnableImplementor.run()RunnableImplementor.java:30
android.os.Handler.handleCallback()Handler.java:739
android.os.Handler.dispatchMessage()Handler.java:95
android.os.Looper.loop()Looper.java:145
android.app.ActivityThread.main()ActivityThread.java:6914
java.lang.reflect.Method.invoke(Native Method)
java.lang.reflect.Method.invoke()Method.java:372
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run()ZygoteInit.java:1404
com.android.internal.os.ZygoteInit.main()ZygoteInit.java:1199

 

In Development
Last Updated: 04 Jul 2019 05:58 by ADMIN
Created by: Rob
Comments: 0
Category: ListView
Type: Bug Report
1
When setting HorizontalItemSpacing or VerticalItemSpacing to the layout, the item spacing appears to be applied twice to the item. 
When setting BackgroundColor to the ItemStyle the background leaks beyond the boundaries of the item.
Approved
Last Updated: 27 Jun 2019 08:06 by ADMIN
Created by: Ron
Comments: 0
Category: ListView
Type: Feature Request
2
Users should be allowed to disable swiping in one direction only.
Under Review
Last Updated: 20 Jun 2019 21:12 by ADMIN

When using a RadListview with a Grid or a Stack Layout in iOS I get the following exception. I haven't tested using the stacklayout outside of the RadListView nor have I tested it outside of the ItemTemplateSelector


Telerik.XamarinForms.Common.NotRegisteredRendererException: There is no renderer registered for the specified type: Xamarin.Forms.Grid
It works fine on Android. Below is the xaml I'm using.


<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:telerikDataControls="clr-namespace:Telerik.XamarinForms.DataControls;assembly=Telerik.XamarinForms.DataControls"
             xmlns:telerikListView="clr-namespace:Telerik.XamarinForms.DataControls.ListView;assembly=Telerik.XamarinForms.DataControls"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:models="clr-namespace:AlertTest.Models"
             mc:Ignorable="d"
             xmlns:views="clr-namespace:AlertTest.Views"
             x:Class="AlertTest.Views.MainPage">
    <ContentPage.Resources>
        <ResourceDictionary>
            <DataTemplate x:Key="NonDivisibleTemplate">
                <Grid>
                    <StackLayout Orientation="Vertical" Padding="10" Spacing="0" BackgroundColor="Yellow" InputTransparent="True" Unfocused="StackLayout_Unfocused">
                        <Label Text="{Binding ItemText}"/>
                    </StackLayout>
            </DataTemplate>
            <DataTemplate x:Key="DivisibleTemplate">
                <Grid>
                    <StackLayout Orientation="Vertical" Padding="15" Spacing="0" BackgroundColor="White" Unfocused="StackLayout_Unfocused">
                        <Label Text="{Binding ItemText}" FontSize="Large" HorizontalTextAlignment="Center"/>
                        <Label Text="{Binding ItemText}" FontSize="Small" FontAttributes="Italic" TextColor="Gray"/>
                    </StackLayout>
                </Grid>
            </DataTemplate>

            <models:MyDataTemplateSelector
                x:Key="MyTemplateSelector"
                NonDivisibleTemplate="{StaticResource NonDivisibleTemplate}"
                DivisibleTemplate="{StaticResource DivisibleTemplate}" />
        </ResourceDictionary>
    </ContentPage.Resources>

    <StackLayout VerticalOptions="StartAndExpand">
        <!-- Place new controls here -->
        <views:FloatingLabelEntry EntryText="{Binding EntryText}" Margin="20" BackgroundColor="Yellow" PlaceholderText="{Binding PlaceholderText}"/>
        <Entry TextChanged="Entry_TextChanged" BackgroundColor="AliceBlue" Margin="20"/>
        <telerikDataControls:RadListView x:Name="listView" ItemsSource="{Binding ListItems}" ItemTemplateSelector="{StaticResource MyTemplateSelector}" SelectionMode="Single" IsItemSwipeEnabled="False" >
            <!--<telerikDataControls:RadListView.ItemSwipeContentTemplate>
                <DataTemplate>
                    -->
            <!--<Grid Margin="0"
                  Padding="0"
                  ColumnSpacing="0"
                  RowSpacing="0">-->
            <!--<Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>-->
            <!--
                    <StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand">
                        <Label BackgroundColor="#2474d2"
                       HorizontalTextAlignment="Start"
                               HorizontalOptions="StartAndExpand"
                       Text="Mark as read"
                       TextColor="White"
                       VerticalTextAlignment="Center" />
                        <Label Grid.Column="2"
                       BackgroundColor="Red"
                       HorizontalTextAlignment="End"
                               HorizontalOptions="EndAndExpand"
                       Text="delete"
                       TextColor="White"
                       VerticalTextAlignment="Center"/>
                    </StackLayout>
                    -->
            <!--</Grid>-->
            <!--
                </DataTemplate>
            </telerikDataControls:RadListView.ItemSwipeContentTemplate>-->
        </telerikDataControls:RadListView>
    </StackLayout>
</ContentPage>

Completed
Last Updated: 19 Jun 2019 12:48 by ADMIN
Release R2 2019 SP1
System.ArgumentNullException(Value cannot be null) is thrown when item from the listview is selected and the groups are expanded/collapsed.
Completed
Last Updated: 19 Jun 2019 12:47 by ADMIN
Release R2 2019 SP1
Java.Lang.IllegalStateException (ViewHolder views must not be attached when created) is thrown when the RadListView is inside ScrollView and LoadOnDemand is enabled.
Completed
Last Updated: 19 Jun 2019 12:47 by ADMIN
Release R2 2019 SP1
Created by: Abhishek
Comments: 0
Category: ListView
Type: Bug Report
0
When the SwipeOffset property is set it does not respect the values set for how much the cell will be moved on the side. 
Completed
Last Updated: 19 Jun 2019 12:46 by ADMIN
Release R2 2019 SP1
ADMIN
Created by: Rosy Topchiyska
Comments: 0
Category: ListView
Type: Bug Report
1
When the ItemSwipeStartingEventArgs.Cancel property is set to true:
Android: NullPointerException
UWP: cell content disappears
Approved
Last Updated: 12 Jun 2019 12:55 by ADMIN
Created by: Safan
Comments: 0
Category: ListView
Type: Bug Report
12
When the ListView has more items, it could be vertically scrolled, however, there is no UI for vertical scrollbar on Android.  The same can be observed with RadTreeView control.
Completed
Last Updated: 06 Jun 2019 14:59 by ADMIN
Release R2 2019

Hi,

On Android, I am using a DataTemplateSelector and a DataTemplate that has a switch on it that the user can press. When the user presses the switch the ListView starts corrupting the data in the list. The item being interacting with starts appearing in other locations on the list.

This issue can be reproduced in the Telerik SDKBrowser project.

Select the following : ListView -> Cell Types -> Template Cell Selector - Xaml

Mark Item1 as special using the button. Scroll down and you will see that an item in the list has been replaced by Item 1 which is now in the list twice.

Regards

Anthony

 

Approved
Last Updated: 06 Jun 2019 14:45 by ADMIN
NullReferenceException is thrown when Singleton ViewModel is used
Approved
Last Updated: 05 Jun 2019 11:47 by ADMIN
When LoadOnDemand feature is enabled and you're using LoadOnDemand event to add more items asynchronously, the loading indicator is not shown and it is not clear to the end user that any action is currently processed. 
Approved
Last Updated: 05 Jun 2019 11:05 by Stefan
When you try to swipe several items at once by using more than 1 finger - the items are stuck and the space where the ItemSwipe content should be present is left blank. The issue can also be observed if you swipe items very fast. 
Approved
Last Updated: 04 Jun 2019 13:36 by ADMIN
the items are reordered when DelegateFilterDescriptor is used and a property from the business object is changed. 
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