.NET MAUI app MediaPicker is crashing with Android.Content.Res.Resources NotFoundException-CodePudding

In my .NET MAUI app, I use the built-in MediaPicker to access user's photos. The app works fine until I tap the icon to access the photos. It then crashes with the following error message:

Android.Content.Res.Resources NotFoundException Message=Drawable com.mycompany.myapp:mipmap/appicon with resource ID #0x7f0d0000

I did replace the app icon recently and I also noticed that the app is not using it when I run the app on an actual device. I simply put a new svg file in the Resources/AppIcon folder with the same name as the original i.e. appicon.svg.

In the properties for this file, I set it as MAUIICON.

This is what's in the project file:

<!-- App Icon -->
<MauiIcon Include="Resources\AppIcon\appicon.svg" />

In case, it's helpful, this is how I'm using the MediaPicker:

try
{
   var result = await MediaPicker.PickPhotoAsync(new MediaPickerOptions
      {
         Title = "Pick Image"
      });

   if (result == null)
      return;
}
catch(Exception e)
{
   // Log error
}

I never hit the catch block. It just crashes with the error message I mentioned above.

Any idea how to address this issue?

CodePudding user response：

The issue is definitely the AppIcon. Looks like .NET MAUI is not generating correct size icons from the svg that I had under Resources\AppIcon.

The workaround is to manually create the necessary icons -- in my case, I only created one 72x72 -- and placed them in Platforms\Android\Resources\mipmap folder. In my case, the Resources folder was there under Platforms\Android so I just had to create the mipmap folder.

I then had to go into AndroidManifest.xml file and correctly link them:

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true"></application>

So, in my case the file name for the app icon I manually generated is ic_launcher.png. I did have to have a second image named ic_launcher_round.png.

Looks like .NET MAUI is supposed to do this work but it's not doing it.

The second bonus -- which it shouldn't be -- is that when I now install the app on a device, I see the correct app icon for my app.

Here's a link to the issue I reported. Anyone experiencing this issue should up vote it so that it'll get the team's attention. https://developercommunity.visualstudio.com/t/Changing-app-icon-of-NET-MAUI-app-then/10090581

CodePudding user response：

I did replace the app icon recently and I also noticed that the app is not using it when I run the app on an actual device.

After changing the icon file, you may need to clean the project in Visual Studio. To clean the project, right-click on the project file in the Solution Explorer pane, and select Clean. You also may need to uninstall the app from the target platform you're testing with.

If you don't clean the project and uninstall the app from the target platform, you may not see your new icon.

For more, check document: Change the icon.