MAUI: What build action for appsettings.json and how to access the file on Android?

Question

I created an appsettings file for a MAUI app and loading it in the IConfiguration using .Host.ConfigureAppConfiguration on the builder from a MauiApp.CreateBuilder(); I can access the file in Windows but not when running the Android emulator. The code:

 var builder = MauiApp.CreateBuilder();
            builder
                .RegisterBlazorMauiWebView()
                .UseMauiApp<App>()
                .ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                })
                .Host
                .ConfigureAppConfiguration((app, config) =>
                {
#if __ANDROID__
                    // https://stackoverflow.com/questions/49867588/accessing-files-through-a-physical-path-in-xamarin-android
                    //var documentsFolderPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.MyDocuments);
                    config.AddJsonFile( "appsettings.json", optional: false, reloadOnChange: true);
#endif

#if WINDOWS10_0_17763_0_OR_GREATER
                    //https://stackoverflow.com/questions/69000474/how-to-load-app-configuration-from-appsettings-json-in-maui-startup
                    Assembly callingAssembly = Assembly.GetEntryAssembly();
                    Version versionRuntime = callingAssembly.GetName().Version;
                    string assemblyLocation = Path.GetDirectoryName(System.AppContext.BaseDirectory); //CallingAssembly.Location
                    var configFile = Path.Combine(assemblyLocation, "appsettings.json");
                    config.AddJsonFile(configFile, optional: false, reloadOnChange: true);
#endif
                });

Mockup project is here

Answer 1

There is an open issue Add support for appsetting.json.

This code snippet from issue 3446 is one work-around:

var builder = MauiApp.CreateBuilder();
        builder
            .RegisterBlazorMauiWebView()
            .UseMauiApp<App>()
            .ConfigureFonts(fonts =>
            {
                fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
            })
            .ConfigureAppConfiguration((app, config) =>
            {
                var assembly = typeof(App).GetTypeInfo().Assembly;
                config.AddJsonFile(new EmbeddedFileProvider(assembly), "appsettings.json", optional: false, false);
            });

Note the use of EmbeddedFileProvider. This works with Build Action EmbeddedResource.

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UPDATE in above code, removed use of .Host, now that ConfigureAppConfiguration is directly on AppBuilder.

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UPDATE 2 See Yepeekai's answer for newer solution. CAVEAT: I have not tested it though.

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UPDATE 3 James Montemagno’s code to support appsettings.json. This link is from a comment in the open issue.