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Transition Effect Issue on Android with 20+ Items and Custom Item Template


I currently have implemented the carousel with a custom item template which includes an image and a few buttons below, with the carousel vertical and horizontal settings set to "Fill". This seems to work great until I increase the number of items in the carousel beyond 20 on the Android platform. Once the itemsSource count is greater than 20, the transition effect between items (when swiped) will be a quick flicker rather than an animating transition. 

I have modified the sample by adding a few buttons below the image inside of the data template, setting the carousel vertical and horizontal to "Fill", and increasing the item source count to 20 items. This issue can be more visible when adding more items to the itemsSource if necessary. 

Attachment: GettingStarted982303964_72f94b9d.zip

13 Replies

MK Muneesh Kumar G Syncfusion Team June 4, 2019 06:06 AM

Hi Trevor, 
Greetings from Syncfusion. 
We have checked with the sample attached and we have found the animation working little slow since the ItemTemplate has been added. We have attached the video with which we have checked the issue. Please have the video from the below link,

Video Link: http://www.syncfusion.com/downloads/support/directtrac/general/ze/CarouselVideo_(1)-1449210375
Please check and confirm whether you are facing the same issue in your application then only we can proceed further with this and able to provide an appropriate solution. 
Muneesh Kumar G. 

TC Trevor Christensen June 4, 2019 08:21 AM

Yes, I am seeing the delay shown in the video or a "flicker" as the carousel item moves into place rather than the transition. Both scenarios seem to happen when the carousel items are greater than 20 with the custom item template on Android. 

MK Muneesh Kumar G Syncfusion Team June 6, 2019 07:44 AM

Hi Trevor,  
Thanks for your confirmation, currently we are checking the root cause for this problem. Due to the source complexity we need some more time to work on this. We will update you the details on or before June 13th, 2019. We appreciate your patience until then.  
Muneesh Kumar G.  

RK Rathana Kumar Sekar Syncfusion Team June 13, 2019 09:53 AM

Hi Trevor,

Thanks for your patience.

We have logged the bug report for reported performance issue in Android SfCarousel. This issue fix will be included our upcoming Volume 2 SP1 release. Which will be rolled out by the end of July 2019.

We will let you know once our Volume 2 SP1 has been rolled out.

Rathanakumar S.

TC Trevor Christensen June 13, 2019 10:32 AM

Thank you, I appreciate it. 

PR Padmini Ramamurthy Syncfusion Team June 14, 2019 01:49 AM

Hi Trevor, 
Thanks for your response and we will let you know once volume 2 SP 1 rolled out. Appreciate your patience until then. 

TC Trevor Christensen August 30, 2019 09:09 AM

Is there any update with this?

MK Muneesh Kumar G Syncfusion Team September 3, 2019 08:06 AM

Hi Trevor, 
We will update you the status on tomorrow September 4th, 2019.  
Muneesh Kumar G  

MK Muneesh Kumar G Syncfusion Team September 4, 2019 06:28 AM

Hi Trevor,  
Due to the stability concern we have not moved the performance fix in our past releases. We will fix this issue and merge the fix in our upcoming volume 3 release, which will be available on end of September 2019.  
Muneesh Kumar G 

TC Trevor Christensen October 3, 2019 12:48 PM

Are there any updates with this issue?

RB Rabhia Beham Kathar Mideenar Syncfusion Team October 4, 2019 07:31 AM

Hi Trevor,

We have improved the "Performance in Android" in Volume 3 main release. We are glad to announce that our Essential Studio 2019 Volume 3 (v17.3.0.14) is rolled out and is available for download under the following link.


We thank you for your support and appreciate your patience in waiting for this release. Please get in touch with us if you would require any further assistance.

Rabhia Beham K

TC Trevor Christensen October 4, 2019 09:21 AM

Works great, thank you.

HM Hemalatha Marikumar Syncfusion Team October 7, 2019 01:26 AM

Hi Trevor, 
Thanks for your update. 
Please let us know if you need any further assistance. 
Hemalatha M. 

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