I'm building an Android and iOS app using Xamarin Forms.
What I'm simply trying to do is set a background drawable on my Android app for my ListView items. The root view of my ListView items are StackLayout's:
var listView = new ListView
{
ItemsSource = items,
ItemTemplate = new DataTemplate(() =>
{
return new ViewCell
{
View = new StackLayout(...)
};
}
};
I know I can access the native element by using a custom renderer:
public class MyEntryRenderer : EntryRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged(e);
if (e.OldElement == null) {
var nativeEditText = (EditText)Control;
...
}
}
}
But I'm not sure how this would work for a StackLayout (or any other layout for that matter).
I first extended StackLayout:
public class ListViewItem : StackLayout
{
}
And I read somewhere that layouts use the VisualElementRenderer, so I tried the following:
public class ListViewItemRenderer : VisualElementRenderer<StackLayout>
{
protected override void OnElementChanged(ElementChangedEventArgs<StackLayout> e)
{
base.OnElementChanged(e);
// any way to access the native element?
}
}
But VisualElementRenderer does not seem to give me access to the native element.
So is there any way I can access the native elements of Layout elements? Or maybe there is a different way to simply set a background drawable on layouts within my Android app?
Even though I still don't know how to access the native element of a layout, the VisualElementRenderer has a method for setting the background drawable on Android (which was exactly what I needed). So I ended up with the following:
protected override void OnElementChanged(ElementChangedEventArgs<StackLayout> e)
{
base.OnElementChanged(e);
SetBackgroundDrawable(Resources.GetDrawable(Resource.Drawable.listViewItem));
}
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