How to display images taken from the camera on the Xamarin.Forms ListView (SfListView)?

You can display images taken by camera in SfListView by loading Image in the SfListView.ItemTemplate.

To know more about using Media plugin for Xamarin, you can refer from the following link: https://github.com/jamesmontemagno/MediaPlugin

Take a photo using CrossMedia plugin and convert to ImageSource.

namespace SfListViewSample
{
    public class ViewModel
    {
        private int count = 0;

        public Command<object> TakePhotoCommand { get; set; }

        public ViewModel()
        {
            ContactsInfo = new ObservableCollection<ListViewContactsInfo>();
            TakePhotoCommand = new Command<object>(OnTakePhotoClicked);
        }

        private async void OnTakePhotoClicked(object obj)
        {
            count += 1;
            var file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
            {
                Directory = "Media\\Pictures",
                Name = "Image" + count,
                SaveToAlbum = false,
                CompressionQuality = 75,
                CustomPhotoSize = 50,
                MaxWidthHeight = 2000,
            });
            var details = new ListViewContactsInfo()
            {
                ContactNumber = random.Next(100, 400).ToString() + "-" + random.Next(500, 800).ToString() + "-" + random.Next(1000, 2000).ToString(),
                ContactName = CustomerNames[count],
            };

            if (file == null)
                return;

            details.ContactImage = ImageSource.FromStream(() =>
            {
                var stream = file.GetStream();
                return stream;
            });

            ContactsInfo.Add(details);
        }
    }
}

Display the taken image using FFImageLoading in the ItemTemplate.

<StackLayout>
    <Button Text="Take photo" Command="{Binding TakePhotoCommand}" HeightRequest="50"/>
    <syncfusion:SfListView x:Name="listView" AutoFitMode="Height" SelectionMode="Single" ItemsSource="{Binding ContactsInfo}">
        <syncfusion:SfListView.ItemTemplate>
            <DataTemplate>
                <Frame BackgroundColor="White" Padding="1" HasShadow="{OnPlatform Android=true, iOS=false, UWP=true, WPF=true}">
                    <Grid> 
                        <ffimage:CachedImage Source="{Binding ContactImage}" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" HeightRequest="150" WidthRequest="150" Aspect="AspectFill"/>
                        <StackLayout Grid.Column="1" Padding="10,0,0,0">
                            ...
                        </StackLayout>
                    </Grid>
                </Frame>
            </DataTemplate>
        </syncfusion:SfListView.ItemTemplate>
    </syncfusion:SfListView>
</StackLayout>