Xamarin.forms Xamarin Plugin.Permission。请求权限时出错

我正在尝试使用和Xamarin.Forms为我的android应用程序授予权限

我遵循提供的示例，但我得到以下错误：

04-10 17:42:09.234 I/MonoDroid(15633): UNHANDLED EXCEPTION:
04-10 17:42:09.234 I/MonoDroid(15633): System.MissingMethodException: Method not found: Android.App.Activity Xamarin.Essentials.Platform.get_CurrentActivity()
04-10 17:42:09.234 I/MonoDroid(15633):   at TestApp.Views.MainPage.OnButtonClicked (System.Object sender, System.EventArgs e) [0x000c3] in C:\projects\my\android-projects\TestXamarin\TestXamarinProject\TestApp\TestApp\Views\MainPage.xaml.cs:31 
04-10 17:42:09.234 I/MonoDroid(15633):   at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__7_0 (System.Object state) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2019-10/android/release/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1021 
04-10 17:42:09.234 I/MonoDroid(15633):   at Android.App.SyncContext+<>c__DisplayClass2_0.<Post>b__0 () [0x00000] in <4ccdb3137d974856b786e1aeebbfbab6>:0 
04-10 17:42:09.234 I/MonoDroid(15633):   at Java.Lang.Thread+RunnableImplementor.Run () [0x00008] in <4ccdb3137d974856b786e1aeebbfbab6>:0 
04-10 17:42:09.235 I/MonoDroid(15633):   at Java.Lang.IRunnableInvoker.n_Run (System.IntPtr jnienv, System.IntPtr native__this) [0x00009] in <4ccdb3137d974856b786e1aeebbfbab6>:0 
04-10 17:42:09.235 I/MonoDroid(15633):   at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.44(intptr,intptr)

我正在请求从MainPage.xaml.cs单击按钮的权限：

public async void OnButtonClicked(object sender, EventArgs e)
{
    var status = await CrossPermissions.Current.CheckPermissionStatusAsync<StoragePermission>();
    if (status != PermissionStatus.Granted)
    {
        // The error occurs here 
        if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.Storage))
        {
            await DisplayAlert("Access needed", "This application uses storage", "OK");
        }

        status = await CrossPermissions.Current.RequestPermissionAsync<StoragePermission>();
    }

    if (status == PermissionStatus.Granted)
    {
        // my logic
    }
    else
    {
        await DisplayAlert("Storage access denied", "Can not continue, try again.", "OK");
    }
}

Xamarin版本：16.5

Android SDK:10.2

Nuget：

Xamarin.表格：4.4

---

Xamarin.Essentials:1.5.2

请确保所有项目中的Xamarin.Essentials版本均为1.5.2，以下是屏幕截图：

我之前在xxx.Android项目中使用了一个较低的版本，并且得到了与您相同的异常

---

我也在这里上传了一个，你可以查看。

也共享AndroidManifest.xml代码。@NitikaFedorov，我测试过同样的代码，它在我这边工作得很好。我能知道你正在使用的测试设备上Xamarin表单的版本吗？@NitikaFedorov，无法生成问题，你能共享代码吗？你的链接器设置是什么？我的答案对你有帮助吗？

public async void OnButtonClicked(object sender, EventArgs e)
{
    var status = await CrossPermissions.Current.CheckPermissionStatusAsync<StoragePermission>();
    if (status != PermissionStatus.Granted)
    {
        // The error occurs here 
        if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.Storage))
        {
            await DisplayAlert("Access needed", "This application uses storage", "OK");
        }

        status = await CrossPermissions.Current.RequestPermissionAsync<StoragePermission>();
    }

    if (status == PermissionStatus.Granted)
    {
        // my logic
    }
    else
    {
        await DisplayAlert("Storage access denied", "Can not continue, try again.", "OK");
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.testapp" android:installLocation="auto">
    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="29" />
    <application android:label="TestApp.Android"></application>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
    <uses-permission android:name="android.permission.READ_PROFILE" />
    <uses-permission android:name="android.permission.WRITE_PROFILE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>

[Application]
public class DemoApplication : Application
{
    // ...

    public PlayerApplication(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
    {
    }

    public PlayerApplication()
    {
    }

    public override void OnCreate()
    {
        base.OnCreate();
        userAgent = Util.GetUserAgent(this, "TestApp");
        // Tried to initialize here, but also doesn't work
        //CrossCurrentActivity.Current.Init(this);
        //Xamarin.Essentials.Platform.Init(this);
    }

    // ...
}