Xamarin.forms: [Bug] [Android] ContentView in CollectionView does not display anything on Android

Created on 8 Jun 2019 · 3Comments · Source: xamarin/Xamarin.Forms

Description

Using a CollectionView where the ItemTemplate has a ContentView with a Label does not display anything in the CollectionView. This seems to work on iOS.

Steps to Reproduce

Create a CollectionView
Set ItemTemplate:

<CollectionView x:Name="colv">
    <CollectionView.ItemTemplate>
         <DataTemplate>
              <ContentView>
                   <Label Text="{Binding Text}"></Label>
              </ContentView>
         </DataTemplate>
    </CollectionView.ItemTemplate>
</CollectionView>

Create a class:

public class T
{
    public string Text { get; set; }
}

Create List and set ItemSource of CollectionView

List<T> cc = new List<T>();
public MainPage()
{
    InitializeComponent();

    for(int i = 0; i < 10; i++)
    {
        cc.Add(new T { Text = "p" + i });
    }
    colv.ItemsSource = cc;
}

Expected Behavior

Show the items in the collectionview

Actual Behavior

Nothing is shown in the collectionview

Basic Information

Version with issue: 4.0.0.425677
Last known good version: -
IDE: VS Mac, VS
Platform Target Frameworks:
- Android: 9.0
Android Support Library Version:
Affected Devices: tested with Motorola G6 Plus but seems to not work on any android device.