SfAccordion Attempt to read from field 'int android.view.ViewGroup$LayoutParams.width' on a null object reference

I am trying to use SfAccordion but i got error while filling the list with data 

Hi Mohamed, 

 

We have checked the reported query and issue gets reproduced but only in latest version of Xamarin Forms 4.3.0.991221. You can overcome the reported issue by loading inside the container like Grid. We have reported the issue to Xamarin Team, you can follow the below bug report for further follow up. 

 

Xamarin Bug: https://github.com/xamarin/Xamarin.Forms/issues/8801 

 

Please find the sample with workaround for your reference from following link. 

 

Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/Accordion1198327037  

 

 

Please let us know if you need any further assistance form our side. 

 

Regards, 

Gnana Priya N 

Thanks for the replying, 

1st: i have a problem to use latest version of Xamarin Forms 4.3.0.991221 coz i got error after installing it can i use  version 4.3.0.991211 instead ?

2nd : is there is event for the sfAccordion Like (OnExpanding - OnExpanded - OnCollapsed - ..... etc ) or i have no control on the headerGroup ?

Hi Mohamed, 

 

Please find the following details for the reported query, 

Query1 :  

Yes. You can use Xamarin forms version 4.3.0.991211. 

 

Query 2 : 

In Accordion, you can use Expanded, Expanding, Collapsed & Collapsing events. You can customize accordion view based on your requirements using these events. 

Query 3: 

We suggest you to use Xamarin version 4.3.0.991211 which works fine in all three platforms. Kindly stick to this version until the reported issue fixes in Xamarin forms.  

 

Please let us know if you have any further queries regarding listview. 

 

Regards, 

Gnana Priya N 

1st : I downgraded the Xamarin.Forms to 4.3.0.991211 and the application works fine without errors in IOS and Andriod.

I fixed my problem for IOS & Andriod After setting Grid row height every thing worked as expected but The RTL (Flow direction) didn't work with IOS and it works for Android fine, is there is anyway to Make RTL works for IOS ?

I just figure out that the HeaderIconPosition in IOS is not appears correctly when i set it to End it shows in Start and when i set it to End it Shows at Start this for IOS Only , Android works Fine.

so that what i did to solve this in RTL:

Hi Mohamed, 

 

Thank you for the update.

Regarding Label positing in RTL: We have checked the issue with the sample, as default all the Accordion elements loading property in RTL mode. When handling Label position, there is a known framework issue there in RTL mode.

Sample link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/AccordionSample-844239292.zip

Also, check the attached sample as we loaded with lower Xamarin.Forms version and confirm your Xamarin.Forms update version, it will be helpful for us to proceed further?

Regards,
Subburaj Pandian V 

Thanks for your support and sample. and i am still using Xamarin.Forms 4.3.0.991211.

Hi  Mohammed, 

 

We would like to inform that when RTL is defined to Accordion, HeaderIcon positions as expected in both Android and iOS. Meantime, please confirm us whether you have added the RightToLeft language in the CFBundleLocalizations section of your Info.plist file like below. 

 

 

We have attached the screenshot for your reference, kindly find them below following link. 

 

Screenshots in Android & iOS: https://www.syncfusion.com/downloads/support/directtrac/general/ze/Screenshots-1047360570  

 

If the reported issue still replicates then revert us back with the issue replicated or modified sample so that we could validate and provide you appropriate solution at our end. 

 

Regards, 

Gnana Priya N 

I tried to edit the info.plist like u mentioned but it didnt change anything, i don't know what i am missing

this is my info.plist

Hi Mohammed, 

 

 

We would like to inform that reported issue does not occur in our side. Can you please confirm us whether reported issue occur in framework also? If possible share issue replicated sample or modified sample in order to check the reported issue in your sample. If you face any difficulties in replicating in the provided sample, we can setup web-meeting to avoid further delay. Kindly confirm your availability for the web meeting so that we can investigate and provide you the solution at the earliest.   

 

 

Regards, 

Gnana Priya N 

if (CrossMultilingual.Current.CurrentCultureInfo.EnglishName == "Arabic")

            {

                this.FlowDirection = FlowDirection.RightToLeft;

                if (Device.RuntimePlatform == Device.iOS)

                {

                    Accordion.HeaderIconPosition = Syncfusion.XForms.Expander.IconPosition.Start;      

                }

                else if (Device.RuntimePlatform == Device.Android)

                {

                    Accordion.HeaderIconPosition = Syncfusion.XForms.Expander.IconPosition.End;

                }

                

            }

Hi Mohammed, 

 

Thanks for the update. 

 

We are glad that reported issue have been fixed in your application. Please let us know if you need any further assistance from us. 

 

Regards, 

Gnana Priya N