Android 13：Xamarin.Forms 不授予访问库图像的权限

问：

自 Android 13 以来，我的 Xamarin.Forms 应用不再具有访问库中图像所需的权限。我知道 Google 已经更改了访问条件，我们需要用细粒度媒体权限替换READ_EXTERNAL_STORAGE：READ_MEDIA_IMAGES、READ_MEDIA_VIDEO和READ_MEDIA_AUDIO。 我已经应用了所有这些更改，但对图像的访问仍然被拒绝（我没有来自系统的权限请求）。更糟糕的是，当我自己手动分配权限时，它也不起作用。最后，Xamarin.Essentials 组件（我使用的是 1.8.0 版）似乎没有考虑 Android 13 施加的更改。有更新计划吗？有没有办法解决这个问题？ 这是我的AndroidManifest.xml文件：

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ApriSoft.memocourses" android:installLocation="auto" android:versionName="5.0.3" android:versionCode="503">
<uses-sdk android:minSdkVersion="20" android:targetSdkVersion="33" />
<application android:label="MemoCourses.Android">
    <activity android:name="microsoft.identity.client.BrowserTabActivity" android:exported="true">
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
            <data android:scheme="msauth" android:host="com.ApriSoft.memocourses" />
        </intent-filter>
    </activity>
</application>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
<uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
<uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />

和 MainActivity.cs 文件：

using System;
using Xamarin.Forms.Platform.Android;
using Xamarin.Forms;
using static MemoCourses.Droid.MainActivity;
using Android.Content;
using Microsoft.Identity.Client;
using Xamarin.Essentials;
using MemoCourses.Models;
using System.Collections.ObjectModel;
using Android.Text.Method;
using Android.Text;
using Plugin.CurrentActivity;

[assembly: ExportRenderer(typeof(Entry), typeof(MyEntryRenderer))]
[assembly: UsesPermission(Android.Manifest.Permission.Camera)]
[assembly: UsesPermission(Android.Manifest.Permission.ReadMediaImages)]/* CSS Document*/

namespace MemoCourses.Droid
{
    [Activity(Label = "MemoCourses", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation, ScreenOrientation = ScreenOrientation.Portrait)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;
            base.OnCreate(savedInstanceState);
            Rg.Plugins.Popup.Popup.Init(this);

            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);

            LoadApplication(new App());
            App.AuthUIParent = this;
            Window.SetStatusBarColor(Android.Graphics.Color.Argb(255, 47, 56, 40));
            ButtonCircleRenderer.Init();
        }

        public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
        {
            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
       global::ZXing.Net.Mobile.Android.PermissionsHandler.OnRequestPermissionsResult(requestCode, permissions, grantResults);
        }

        protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
        {
            base.OnActivityResult(requestCode, resultCode, data);
        
AuthenticationContinuationHelper.SetAuthenticationContinuationEventArgs(requestCode, resultCode, data);
        }

        public override void OnBackPressed()
        {
            Rg.Plugins.Popup.Popup.SendBackPressed(base.OnBackPressed);
        }
    }
}

这是我用来选择图像的代码：

try
{
    FileData fileData = await CrossFilePicker.Current.PickFile();
    //
    var filepath = fileData.FilePath;
    //
    if (fileData == null)
        return; // user canceled file picking
    
    newimageByte = fileData.DataArray;
    resizedImageByte = await ImageResizer.ResizeImage(newimageByte, 200, 200);

    if (resizedImageByte != null)
    {
        var stream1 = new MemoryStream(resizedImageByte);
        ImageArticle.Source = ImageSource.FromStream(() => stream1);
    }
}
catch (Exception ex)
{
    
    imageGallery = false;
    imageChanged = false;
}

非常感谢你对我的帮助，我已经找了好几天了，找不到解决方案。我的应用的所有用户（其手机已更新到 Android 13）都无法再从图库中选择图像。