如何在Xamarin表单中以编程方式从Android清单文件中获取提供者权限值？

using Android.Content.PM;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: Dependency(typeof(PermissionService))]
namespace YourNamespace
{
    public class PermissionService : IPermissionService
    {
        public string GetProviderPermission()
        {
            string providerPermission = "";

            // 获取当前Android清单文件
            Android.Content.PM.PackageInfo packageInfo = Android.App.Application.Context.PackageManager.GetPackageInfo(Android.App.Application.Context.PackageName, PackageInfoFlags.Permissions);

            // 遍历所有权限
            foreach (PermissionInfo permission in packageInfo.Permissions)
            {
                // 检查权限名称是否包含提供者关键字
                if (permission.Name.Contains("provider"))
                {
                    // 将提供者权限值存储到变量中
                    providerPermission = permission.Name;
                    break;
                }
            }

            return providerPermission;
        }
    }
}