使用 xamarin 表单的 android 13 上的存储权限问题

我在 Visual Studio 2022 的帮助下为我的 Android 项目使用 xamarin.forms。当我将代码运行到我的移动 Android 13 时，我没有获得 Android 13 的弹出权限。我只是将 androidtargetsdkversion 从 29 更新到 33。这是我的代码： AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="preferExternal" package="com.myapp.app" android:versionCode="23" android:versionName="12.6.1">
<uses-sdk android:minSdkVersion="24" android:targetSdkVersion="33" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature android:name="android.hardware.telephony" android:required="false" />
<uses-feature android:name="android.hardware.location" android:required="false" />
<uses-feature android:name="android.hardware.location.gps" android:required="false" />
<uses-feature android:name="android.hardware.camera" android:required="false"/>
<uses-feature android:name="android.hardware.location.network" android:required="false" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CALL_PHONE" android:required="false" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.READ_PHONE_NUMBERS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<application android:allowBackup="false" android:requestLegacyExternalStorage="true" android:label="FieldDirect" android:largeHeap="true">
<uses-library android:name="org.apache.http.legacy" android:required="false" />
<meta-data android:name="com.google.firebase.messaging.default_notification_icon" android:resource="@drawable/icon_transparent" />
<meta-data android:name="com.google.firebase.messaging.default_notification_color" android:resource="@color/brown" />
<meta-data android:name="com.google.android.geo.API_KEY" android:value="Adfsgrgsdvewsdvevwdvsdvsdv" />
<receiver android:name="com.google.firebase.iid.FirebaseInstanceIdInternalReceiver" android:exported="false" />
<receiver android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver" android:exported="true" android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="${applicationId}" />
</intent-filter>
</receiver>
<service android:name="crc6494e14b9856016c30.PNFirebaseMessagingService" android:exported="false">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<provider android:name="android.support.v4.content.FileProvider" android:authorities="com.myapp.app.fileprovider" android:exported="false" android:grantUriPermissions="true">
<meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_path" />
</provider>
</application>
</manifest>

应用程序.xaml.cs：

if (context != null)
 {
 if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.M)
 {
 if ((Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.Camera) != Android.Content.PM.Permission.Granted)
 && (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.ReadExternalStorage) != Android.Content.PM.Permission.Granted)
 && (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.WriteExternalStorage) != Android.Content.PM.Permission.Granted)
 && (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.AccessCoarseLocation) != Android.Content.PM.Permission.Granted)
 && (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.AccessFineLocation) != Android.Content.PM.Permission.Granted)
 && (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.CallPhone) != Android.Content.PM.Permission.Granted)
 && (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.ReadPhoneState) != Android.Content.PM.Permission.Granted)
 && (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Manifest.Permission.ReadPhoneNumbers) != Android.Content.PM.Permission.Granted))
 {

 ActivityCompat.RequestPermissions(context, new String[] { Manifest.Permission.Camera,
 Manifest.Permission.ReadExternalStorage,
 Manifest.Permission.WriteExternalStorage,
 Manifest.Permission.AccessCoarseLocation,
 Manifest.Permission.AccessFineLocation,
 Manifest.Permission.ReadPhoneNumbers,
 Manifest.Permission.ReadPhoneState,
 Manifest.Permission.CallPhone }, 100);

 }
 }
 }

任何人请帮我解决这个问题

当我在手机 android 13 上运行代码时，我没有获得 android 13 的弹出权限。我只是将 androidtargetsdkversion 从 29 更新到 33。

关于READ，Android 13有一些新的变化：

如果您的应用面向 Android 13 或更高版本，并且需要访问其他应用创建的媒体文件，则您必须请求以下一项或多项精细媒体权限，而不是请求READ_EXTERNAL_STORAGE允许。

更详细的你可以参考这个：精细的媒体权限 https://developer.android.com/about/versions/13/behavior-changes-13#granular-media-permissions.

此外，你还可以看到亚历山大的在这个帖子里回答 https://stackoverflow.com/a/73630987/19902734。这总结得很好。希望它可以帮助你。