Error when using BusyIndicator in Xamarin Forms BusyIndicator

Osayed

7 posts

Member since:
Feb 2018

Posted 12 Jun 2018 Link to this post

Hello, When i'm creating a new instance of the RadBusyIndicator I get this error:

Constructor on type Telerik.XamarinForms.Primitives/Animation-1 not found

Lance | Manager - Technical Support

Admin

1100 posts

Posted 13 Jun 2018 Link to this post

Hi Osayed,

Unfortunately, this is not enough information for me to determine what the problem might be. The AnimationType list can be found in the Animations documentation article.

Here's an example of setting one.

<telerikBusyIndicator:RadBusyIndicator x:Name="radBusyIndicator" AnimationType="Animation4" IsBusy="True"/>

Note: Make sure you also have the required SkiaSharp (v 1.59.3) packages installed as well:

SkiaSharp (all projects)
SkiaSharp.Views (all projects except class library)
SkiaSharp.Views.Forms (all projects)

If you still experience issues please share the code that you're using, along with details of the target platform, so that I can investigate directly.

Regards,
Lance | Tech Support Engineer, Sr.
Progress Telerik

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Osayed

7 posts

Member since:
Feb 2018

Posted 14 Jun 2018 in reply to Lance | Manager - Technical Support Link to this post

Hello, I do have SkiaSharp on all my projects, also here is the code I use:

RadBusyIndicator radBusyIndicator = new RadBusyIndicator()

{

IsBusy = true,

Content = new Label() { Text = "This is the content of the RadBusyIndicator control displayed when the indicator is not busy.", TextColor = Color.Black },

AnimationContentWidthRequest = 100,

AnimationContentHeightRequest = 100,

};

Osayed

7 posts

Member since:
Feb 2018

Posted 14 Jun 2018 in reply to Osayed Link to this post

Hello, I do have SkiaSharp on all my projects, also here is the code I use:

RadBusyIndicator radBusyIndicator = new RadBusyIndicator()

{

IsBusy = true,

Content = new Label() { Text = "This is the content of the RadBusyIndicator control displayed when the indicator is not busy.", TextColor = Color.Black },

AnimationType = AnimationType.Animation8,

AnimationContentWidthRequest = 100,

AnimationContentHeightRequest = 100,

}; 

Also, I am using Xamarin.Forms, and this error happens in both iOS and Android,



Also when I tried creating a new project It worked on iOS but not on Android when using .NET Standard, but it worked on PCL.

Lance | Manager - Technical Support

Admin

1100 posts

Posted 14 Jun 2018 Link to this post

Hello Osayed,

Can you also confirm all the SkiaSharp packages are using v1.59.x and not 1.6? The NuGet package manager can sometimes install the latest even when the dependency is an earlier version.

Also, double check the RadBusyIndicator Required Telerik Assemblies documentation to insure that you have all the Telerik assemblies referenced:

RadBusyIndicator Required Telerik Assemblies

- Portable (or .NET Standard) Project
Telerik.XamarinForms.Common.dll
Telerik.XamarinForms.Primitives.dll
Telerik.XamarinForms.SkiaSharp.dll

- Android Project
Telerik.XamarinForms.Common.dll
Telerik.XamarinForms.Primitives.dll
Telerik.XamarinForms.SkiaSharp.dll

- iOS Project
Telerik.XamarinForms.Common.dll
Telerik.XamarinForms.Primitives.dll
Telerik.XamarinForms.SkiaSharp.dll

- UWP Project
Telerik.XamarinForms.Common.dll
Telerik.XamarinForms.Primitives.dll
Telerik.XamarinForms.SkiaSharp.dll

Demo

I've attached a demo. It's a straightforward "File > New Xamarin.Forms" with "Blank app" and ".NET Standard" selected. After creating the projects, I installed Telerik UI for Xamarin (via the Telerik NuGet server), updated Xamarin.Forms to the latest service release available for that version (3.0 in this case) and added the required NuGet packages (for example Required Android support libraries).

Here is the entirety of the code:

XAML

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"

xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"

xmlns:local="clr-namespace:NetStandard2_Test"

x:Class="NetStandard2_Test.MainPage">

<Grid x:Name="RootGrid"/>

</ContentPage>

Code-Behind

using Telerik.XamarinForms.Primitives;

using Xamarin.Forms;

namespace NetStandard2_Test

{

public partial class MainPage : ContentPage

{

public MainPage()

{

InitializeComponent();

RadBusyIndicator radBusyIndicator = new RadBusyIndicator

{

IsBusy = true,

Content = new Label { Text = "This is the content of the RadBusyIndicator control displayed when the indicator is not busy.", TextColor = Color.Black },

AnimationType = AnimationType.Animation8,

AnimationContentWidthRequest = 100,

AnimationContentHeightRequest = 100,

};

RootGrid.Children.Add(radBusyIndicator);

}

Here's the result at runtime:

As you can see, the control is working as expected.

Further Investigation

If you have any trouble, update my attached demo so that it replicates the issue and send it back to me so that we can investigate the issue directly.

Regards,
Lance | Tech Support Engineer, Sr.
Progress Telerik

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items

NetStandard2-Test.zip

Osayed

7 posts

Member since:
Feb 2018

Posted 15 Jun 2018 in reply to Lance | Manager - Technical Support Link to this post

Hello, when I try to build your sample project, I get this error:

Unable to find package Telerik.UI.for.Xamarin with version (=> 2018.2.516.2)
- Found 1 version(s) in nuget.org [ Nearest version: 2015.3.1202 ]
- Found 0 version(s) in Microsoft Visual Studio Offline Packages
- Found 0 version(s) in Local

Also, I cannot post a sample project because it says the only allowed extensions are jpg, jpeg, png and gif.

Lance | Manager - Technical Support

Admin

1100 posts

Posted 18 Jun 2018 Link to this post

Hi Osayed,

Please read the 2nd sentence under "Demo" section in my last reply. I explain that I used the Telerik NuGet server instead of local assemblies (click that link to be brought to the instructions). After you follow the instructions, you'll be able to build!

For your convenience, here's the link again: Telerik NuGet Server.

Regards,
Lance | Tech Support Engineer, Sr.
Progress Telerik

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items

Osayed

7 posts

Member since:
Feb 2018

Posted 19 Jun 2018 Link to this post

Hello,

I did read the tutorial and I did everything it said. But I still get the same error and it says "Found 0 version(s) in telerik"

And If I try to search in the Telerik Nuget I get no result. (It shows no packages).

I used my Telerik account credentials to login to https://nuget.telerik.com/nuget.

But it still is empty in both web and Visual Studio. (See attached screenshot)

Screenshot_556.png

Lance | Manager - Technical Support

Admin

1100 posts

Posted 19 Jun 2018 Link to this post

Hello Osayed,

The screenshot you've provided is the expected result. I looked into your account and it seems you do not have a license for UI for Xamarin. This is why you cannot see any results for the specific package in the NuGet feed.

In fact, you've never started a trial or downloaded UI for Xamarin, where did you get the release you're using? Telerik licensing is per-developer and cannot be shared among many users..

It is common that a developer uses a license that was purchased by their employer, for this case we have an easy to use portal so that the employer can assign you as the Licensed User of the product. Have the owner of the license take the following steps:

1 - Go the Managed Licensed Users portal
2 - Unassign themselves from the license (they will remain the owner and can change users at any time)
3 - Assign you as the Licensed User using your Telerik Account email address

Once you obtain a license (trial or paid), you'll be able to then see the Xamarin packages in the Telerik NuGet feed (note that if you are assigned a trial license, you'll need to switch to the Trial NuGet package).

Regards,
Lance | Tech Support Engineer, Sr.
Progress Telerik

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items

Osayed

7 posts

Member since:
Feb 2018

Posted 19 Jun 2018 in reply to Lance | Manager - Technical Support Link to this post

Hello, I got the release by downloading the trial in another account. I will try downloading it in this account and getting a trial license.

Thanks.

Lance | Manager - Technical Support

Admin

1100 posts

Posted 19 Jun 2018 Link to this post

Hello Osayed,

Yep, that would explain why you're having a problem. Easy fix! Once you start the download, you'll automatically be assigned the trial license.

Once that happens the NuGet server should show you the following packages:

If you have any further trouble, let me know.

Regards,
Lance | Tech Support Engineer, Sr.
Progress Telerik

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items

Rabeeh

1 posts

Member since:
Jul 2011

Posted 16 Sep 2019 in reply to Lance | Manager - Technical Support Link to this post

We testing this the latest version from Telerik Package

We added this first page, the whole application crashed, plus once we added the Telerik Xamarin the Application increased 100 MB in size

<primitives:RadBusyIndicator x:Name="radBusyIndicator"
IsVisible="{Binding IsBusy}"
IsBusy="{Binding IsBusy}"
AnimationContentHeightRequest="100"
AnimationContentWidthRequest="100"
AnimationType="Animation4"
AnimationContentColor="LightBlue"
Grid.Row="0"
Grid.RowSpan="2">
<primitives:RadBusyIndicator.Content>
<Grid BindingContext="{x:Reference Page}"
WidthRequest="{Binding Width}"
HeightRequest="{Binding Height}" />
</primitives:RadBusyIndicator.Content>
</primitives:RadBusyIndicator>

Lance | Manager - Technical Support

Admin

1100 posts

Posted 16 Sep 2019 Link to this post

Hello Rabeeh,

Without the crash details, I cannot tell you what went wrong.

Crash Suspicion

If I had to guess, it is because the ContentPage you used that code in doesn't have the name "Page". The BindingContext of the BusyIndicator.Content uses an x:Reference, this means the target of that x:Reference must exist, you you'll crash your application.

To better explain, here's the same code, with the relevant parts highlighted:

<ContentPage x:Name="Page" ....>
....
    <primitives:RadBusyIndicator x:Name="radBusyIndicator"
                                     IsVisible="{Binding IsBusy}"
                                     IsBusy="{Binding IsBusy}"
                                     AnimationContentHeightRequest="100"
                                     AnimationContentWidthRequest="100"
                                     AnimationType="Animation4"
                                     AnimationContentColor="LightBlue"
                                     Grid.Row="0"
                                     Grid.RowSpan="2">
                <primitives:RadBusyIndicator.Content>
                    <Grid BindingContext="{x:Reference Page}"
                      WidthRequest="{Binding Width}"
                      HeightRequest="{Binding Height}" />
                </primitives:RadBusyIndicator.Content>
    </primitives:RadBusyIndicator>
</ContentPage>

Ultimately, you don't have to take that approach. You can just use it without inner content predefined. Try starting with this, then add features you want afterwards.

<primitives:RadBusyIndicator  IsVisible="{Binding IsBusy}"  IsBusy="{Binding IsBusy}"/>

App Size

Answering your question about app size, it's expected that your package size increased. This is because you're including all the assemblies for all the controls. If you only are using thew RadBusyIndicator, then you can only use the assemblies that the RadBusyIndicator comes in (it is only 3 assemblies, plus SkiaSharp nuget). Please read the RadBusyIndicator Getting Started documentation for more information.

If you have any further trouble or questions about assemblies, please open a Support ticket here and include all the details about your setup (XF version, target platform version, etc) and we'll be happy to assist with your specific setup.

Regards,
Lance | Technical Support Engineer, Principal
Progress Telerik

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items