How to use the mipmap folder in Xamarin.Android?

8
votes

For app icons we should use the mipmap folder. Now I added the following folders to the Resources folder:

  • mipmap-hdpi
  • mipmap-ldpi
  • mipmap-mdpi
  • mipmap-xhdpi
  • mipmap-xxhdpi
  • mipmap-xxxhdpi

In each of these folders there is a ic_launcher.png for the app icon and the build action is AndroidResource.

Now I can't set the Application Icon in the Android Manifest. It doesn't appear there. What I'm missing?

I deleted the default icon in the drawable folder and removed the entry in Android Manifest. On build I got

No resource found that matches the given name (at 'icon' with value '@drawable/icon').
File: ...\SomeApp.Droid\obj\Debug\android\manifest\AndroidManifest.xml

There was an entry in MainActivity which was the old reference to Icon = @drawable/icon. Now I changed to Icon = @mipmap/ic_launcher and the error was gone.

3
androidxamarin.android

3 Answers

6
votes

I manually edited the AndroidManifest.xml to use the mipmapfolder:

<application android:label="@string/app_name" android:icon="@mipmap/ic_launcher"></application>
1
votes

Tried these:

  1. I deleted all references to default icon.
  2. Deleted the icon in Drawable folder itself.
  3. Added the new reference to my mipmaps (in Resources) in Manifest. and still no resource match was found.

Additionally:

What I had to do was add the folders and icons in manually (i.e. right-click > add > new folder). I could not just drag and drop it in whereas doing so does not allow you to see the icon files inside folders either.

It seems the build action should automatically be set to newly added resources (ref). I'm not sure why a drag-and-drop to solution explorer would "hide" files in folders.

1
votes

No resource found that matches the given name (at 'icon' with value '@mipmap/CircleIcon')

In my case my icon name is "CircleIcon.png".

I fixed this issue by doing the following:

  1. Change name of the icon CircleIcon.png to icon.png.
  2. Reference it again in the project.

  3. Change MainActivity to this:

    [Activity(
     Label = "Appname",
     Icon = "@mipmap/icon",
     Theme = "@style/MainTheme" /*"@android:style/Theme.Material.Light" */,
     Exported = true,
     LaunchMode = LaunchMode.SingleTask,
     MainLauncher = true,
     ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation,
     HardwareAccelerated = true,
     ScreenOrientation = ScreenOrientation.Portrait)]

  4. Clean solution space and rebuild.