Xamarin.Forms：使用资产目录中的图像

Question

I have a Master Detail page and I want to set the icon in the navigation bar to show the menu. Therefore I put my images into an asset catalog (Asset Catalogs > Media > menu). If I want to reference that image from XAML it doesn't show up, when the image is in the asset catalog.

I tried different paths, but they all don't work. Debugging also doesn't show any images. It seems that Xamarin.Forms doesn't support asset catalogs, but that is not true. On a normal content page I have this:

<ContentPage.ToolbarItems>
 <ToolbarItem Text="Configuration" Activated="OpenConfiguration" Order="Primary" Priority="0">
  <ToolbarItem.Icon>
    <OnPlatform x:TypeArguments="FileImageSource">
      <OnPlatform.iOS>gear.png</OnPlatform.iOS>
      <OnPlatform.Android>gear.xml</OnPlatform.Android>
      <OnPlatform.WinPhone>Assets/gear.png</OnPlatform.WinPhone>
    </OnPlatform>
  </ToolbarItem.Icon>
 </ToolbarItem>
</ContentPage.ToolbarItems>

This is working without problems. On my MasterPage (page, which is responsible for showing the menu entries in the master detail template) I have this:

<ContentPage.Icon>
 <OnPlatform x:TypeArguments="FileImageSource">
  <OnPlatform.iOS>menu.png</OnPlatform.iOS>
  <OnPlatform.Android>menu.xml</OnPlatform.Android>
  <OnPlatform.WinPhone>Assets/menu.png</OnPlatform.WinPhone>
 </OnPlatform>
</ContentPage.Icon>

Bascially, it is the same code, but the icon doesn't show up. I get the icon only displaying if I put the images into Resources folder ...

But how can I use the images from the asset catalog in my XAML?

Answer 1

The only response I got from Xamarin is, that FileImageSource can't be used with an asset catalog. That isn't completely true, but since it doesn't work every time one shouldn't use it.