// преданный外部хранилище Оглавление
// /storage/emulated/0/Android/data/com.companyname.app/files/
Android.Content.Context.GetExternalFilesDir(string type)

// Основное внешнее хранилище
// /storage/emulated/0/
Android.OS.Environment.ExternalStorageDirectory

//global::Android.OS.Environment.ExternalStorageDirectory.AbsolutePath :Установить Android из root Оглавление
//Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)::Получить данные AndroidОглавление
var path = global::Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);

// создаватьдокумент
System.IO.Directory.CreateDirectory(path);

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<application android:label="cardionNet2.Android"></application> 

<?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.demoapp" android:installLocation="auto">
	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
	<application android:label="DemoApp.Android" android:theme="@style/MainTheme"></application>
	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
	<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
</manifest>

bool isReadonly = Environment.MediaMountedReadOnly.Equals(Environment.ExternalStorageState);
bool isWriteable = Environment.MediaMounted.Equals(Environment.ExternalStorageState);

bool isReadonly = Android.OS.Environment.MediaMountedReadOnly.Equals(Android.OS.Environment.ExternalStorageState);
            bool isWriteable = Android.OS.Environment.MediaMounted.Equals(Android.OS.Environment.ExternalStorageState);

<!-- When the Flyout is visible this will be a menu item you can tie a click behavior to  -->
<MenuItem Text="Logout" StyleClass="MenuItemLayoutStyle" Clicked="OnMenuItemClicked">
</MenuItem>

<!-- 
	When the Flyout is visible this defines the content to display in the flyout.
	FlyoutDisplayOptions="AsMultipleItems" will create a separate flyout item for each child element    
	https://docs.microsoft.com/dotnet/api/xamarin.forms.shellgroupitem.flyoutdisplayoptions?view=xamarin-forms
-->
<FlyoutItem Title="первая страница" Icon="icon_about.png">
    <ShellContent Route="HomePage" ContentTemplate="{DataTemplate local:HomePage}" />
</FlyoutItem>
<FlyoutItem Название="Список" Icon="icon_feed.png">
    <ShellContent Route="ItemsPage" ContentTemplate="{DataTemplate local:ItemsPage}" />
</FlyoutItem>
<FlyoutItem Title="настраивать" Icon="icon_setting.png">
    <ShellContent Route="SettingPage" ContentTemplate="{DataTemplate local:SettingPage}" />
</FlyoutItem>

<Shell xmlns="http://xamarin.com/schemas/2014/forms"
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:controls="clr-namespace:Xaminals.Controls"
       xmlns:views="clr-namespace:Xaminals.Views"
       x:Class="Xaminals.AppShell">
    <FlyoutItem Title="Cats"
                Icon="cat.png">
       <Tab>
           <ShellContent ContentTemplate="{DataTemplate views:CatsPage}" />
       </Tab>
    </FlyoutItem>
    <FlyoutItem Title="Dogs"
                Icon="dog.png">
       <Tab>
           <ShellContent ContentTemplate="{DataTemplate views:DogsPage}" />
       </Tab>
    </FlyoutItem>
</Shell>

<Shell xmlns="http://xamarin.com/schemas/2014/forms"
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:controls="clr-namespace:Xaminals.Controls"
       xmlns:views="clr-namespace:Xaminals.Views"
       x:Class="Xaminals.AppShell">
   <ShellContent Title="Cats"
                 Icon="cat.png"
                 ContentTemplate="{DataTemplate views:CatsPage}" />
   <ShellContent Title="Dogs"
                 Icon="dog.png"
                 ContentTemplate="{DataTemplate views:DogsPage}" />
</Shell>

<Shell ...>
    ...
    <Shell.ItemTemplate>
        <DataTemplate>
            <Grid ColumnDefinitions="0.2*,0.8*">
                <Image Source="{Binding FlyoutIcon}"
                       Margin="5"
                       HeightRequest="45" />
                <Label Grid.Column="1"
                       Text="{Binding Title}"
                       FontAttributes="Italic"
                       VerticalTextAlignment="Center" />
            </Grid>
        </DataTemplate>
    </Shell.ItemTemplate>
</Shell>

<Shell ...
       x:Name="shell">
    ...
    <Shell.FlyoutContent>
        <CollectionView BindingContext="{x:Reference shell}"
                        IsGrouped="True"
                        ItemsSource="{Binding FlyoutItems}">
            <CollectionView.ItemTemplate>
                <DataTemplate>
                    <Label Text="{Binding Title}"
                           TextColor="White"
                           FontSize="Large" />
                </DataTemplate>
            </CollectionView.ItemTemplate>
        </CollectionView>
    </Shell.FlyoutContent>
</Shell>

<Shell ...
       x:Name="shell">
    ...
    <Shell.FlyoutContentTemplate>
        <DataTemplate>
            <CollectionView BindingContext="{x:Reference shell}"
                            IsGrouped="True"
                            ItemsSource="{Binding FlyoutItems}">
                <CollectionView.ItemTemplate>
                    <DataTemplate>
                        <Label Text="{Binding Title}"
                               TextColor="White"
                               FontSize="Large" />
                    </DataTemplate>
                </CollectionView.ItemTemplate>
            </CollectionView>
        </DataTemplate>
    </Shell.FlyoutContentTemplate>
</Shell>

<Shell ...
       CurrentItem="{x:Reference aboutItem}">
    <FlyoutItem FlyoutDisplayOptions="AsMultipleItems">
        ...
    </FlyoutItem>
    <ShellContent x:Name="aboutItem"
                  Title="About"
                  Icon="info.png"
                  ContentTemplate="{DataTemplate views:AboutPage}" />
</Shell>

CurrentItem = aboutItem;

Shell.Current.CurrentItem = aboutItem;

<Shell ...
       FlyoutIsPresented="{Binding IsFlyoutOpen}">
</Shell>

Shell.Current.FlyoutIsPresented = false;

<TabBar>
    <ShellContent Title="About" Icon="icon_about.png" Route="AboutPage" ContentTemplate="{DataTemplate local:AboutPage}" />
    <ShellContent Title="Browse" Icon="icon_feed.png" ContentTemplate="{DataTemplate local:ItemsPage}" />
</TabBar>

<!--
	If you would like to navigate to this content you can do so by calling
	await Shell.Current.GoToAsync("//LoginPage");
-->
<TabBar>
    <ShellContent Route="LoginPage" ContentTemplate="{DataTemplate local:LoginPage}" />
</TabBar>

<Shell xmlns="http://xamarin.com/schemas/2014/forms"
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:views="clr-namespace:Xaminals.Views"
       x:Class="Xaminals.AppShell">
    <TabBar>
       <Tab>
           <ShellContent ContentTemplate="{DataTemplate views:CatsPage}" />
       </Tab>
    </TabBar>
</Shell>

<Shell xmlns="http://xamarin.com/schemas/2014/forms"
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:views="clr-namespace:Xaminals.Views"
       x:Class="Xaminals.AppShell">
    <TabBar>
       <Tab Title="Domestic"
            Icon="paw.png">
           <ShellContent Title="Cats"
                         ContentTemplate="{DataTemplate views:CatsPage}" />
           <ShellContent Title="Dogs"
                         ContentTemplate="{DataTemplate views:DogsPage}" />
       </Tab>
       <Tab Title="Monkeys"
            Icon="monkey.png">
           <ShellContent ContentTemplate="{DataTemplate views:MonkeysPage}" />
       </Tab>
    </TabBar>
</Shell>

<Shell ...
       CurrentItem="{x:Reference dogsItem}">
    <TabBar>
        <ShellContent Title="Cats"
                      Icon="cat.png"
                      ContentTemplate="{DataTemplate views:CatsPage}" />
        <ShellContent x:Name="dogsItem"
                      Title="Dogs"
                      Icon="dog.png"
                      ContentTemplate="{DataTemplate views:DogsPage}" />
    </TabBar>
</Shell>

<!-- показыватьсуществовать Нижняя панель навигации -->
<FlyoutItem Title="первая страница" Icon="icon_about.png">
    <Tab Title="первая страница" Icon="icon_about.png">
        <ShellContent x:Name="HotPageItem" 
                      Название="Горячий"
                      ContentTemplate="{DataTemplate local:HotPage}" />
        <ShellContent x:Name="RecomPageItem" 
                      Название="Рекомендуется"
                      ContentTemplate="{DataTemplate local:RecomPage}" />
        <ShellContent x:Name="LastPageItem" 
                      Название="Последний"
                      ContentTemplate="{DataTemplate local:LastPage}" />
    </Tab>
    <Tab Название="Игра" Icon="icon_feed.png">
        <ShellContent ContentTemplate="{DataTemplate local:ItemsPage}" />
    </Tab>
    <Tab Название="Канал" Icon="icon_feed.png">
        <ShellContent ContentTemplate="{DataTemplate local:ItemsPage}" />
    </Tab>
    <Tab Название="динамический" Icon="icon_feed.png">
        <ShellContent ContentTemplate="{DataTemplate local:ItemsPage}" />
    </Tab>
</FlyoutItem>
<!-- показыватьсуществоватьсторонапоявлятьсястолбец -->
<FlyoutItem Название="О программе" Icon="icon_about.png">
    <ShellContent ContentTemplate="{DataTemplate local:HomePage}" />
</FlyoutItem>
<FlyoutItem Title="настраивать" Icon="icon_setting.png">
    <ShellContent ContentTemplate="{DataTemplate local:SettingPage}" />
</FlyoutItem>

<Tab Title="первая страница" Icon="icon_about.png" CurrentItem="{x:Reference RecomPageItem}">
    <ShellContent x:Name="HotPageItem" 
                  Название="Горячий"
                  ContentTemplate="{DataTemplate local:HotPage}" />
    <ShellContent x:Name="RecomPageItem" 
                  Название="Рекомендуется"
                  ContentTemplate="{DataTemplate local:RecomPage}" />
    <ShellContent x:Name="LastPageItem" 
                  Название="Последний"
                  ContentTemplate="{DataTemplate local:LastPage}" />
</Tab>

public string GetVersion()
{
    // https://stackoverflow.com/questions/47353986/xamarin-forms-forms-context-is-obsolete
    var context = Android.App.Application.Context;

    return context.PackageManager.GetPackageInfo(context.PackageName, 0).VersionName;
}

public string GetVersion()
{
    var activity=Xamarin.Forms.Forms.Context as Activity;
    return activity.PackageManager.GetPackageInfo(activity.PackageName, 0).VersionName;
}

public string GetVersion()
{
    return NSBundle.MainBundle.InfoDictionary["CFBundleShortVersionString"].ToString();
}

public void InstallAPK(string filePath)
{
     try
     {
         Java.IO.File apkFile = new Java.IO.File(filePath);

         Intent intent = new Intent(Intent.ActionView);
         intent.SetFlags(ActivityFlags.NewTask);

         // Уведомление: 直接从документсередина Установить APK и Установить из менеджера загрузок середина нет то же самое
         // Получить Скачать документизUri
         if (Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.N)
         {
             // Android 7.0+
             Android.Net.Uri apkFileUri = Android.Support.V4.Content.FileProvider.GetUriForFile(_mContext, "github.yiyungent.onetree.fileprovider", apkFile);
             intent.AddFlags(ActivityFlags.GrantReadUriPermission);
             intent.SetDataAndType(apkFileUri, "application/vnd.android.package-archive");
         }
         else
         {
             Android.Net.Uri apkFileUri = Android.Net.Uri.FromFile(apkFile);
             intent.SetDataAndType(apkFileUri, "application/vnd.android.package-archive");
         }
         _mContext.StartActivity(intent);
     }
     catch (Exception ex)
     {

     }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="0.4.2" package="github.yiyungent.onetree" android:installLocation="auto">
  <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
  <application android:label="OneTree" android:theme="@style/MainTheme">
    <provider android:name="android.support.v4.content.FileProvider" android:authorities="github.yiyungent.onetree.fileprovider" android:exported="false" android:grantUriPermissions="true">
      <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" />
    </provider>
  </application>
  <!-- доступ Разрешения на состояние сети -->
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <!-- 读Писать Разрешения на внешнее хранилище -->
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  <!-- доступ Сетевые разрешения -->
  <uses-permission android:name="android.permission.INTERNET" />
  <!-- существоватьSDCardсерединасоздаватьиудалитьдокумент Разрешения -->
  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
  <!-- Разрешить установку пакетов из неизвестных источников -->
  <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
</manifest>

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
  <!--Context.getFilesDir() 位于/data/data/Установить Оглавление-->
  <files-path name="internalPath" path="file" />
  <!--Context.getCacheDir()-->
  <cache-path name="cachePath" path="file" />
  <!--Environment.getExternalStorageDirectory()-->
  <external-path name="externalPath" path="file" />
  <!--Context.getExternalFilesDir(null)-->
  <external-files-path name="externalFPath" path="file" />
  <root-path
          name="root-path"
          path="." />
</paths>

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

//Загружаем на локальный диск и выполняем установку
private void InstallAPK()
{
    // Получить Скачать документизUri
    Android.Net.Uri downloadFileUri = _downloadManager.GetUriForDownloadedFile(_downloadId);
    if (downloadFileUri != null)
    {
        Intent intent = new Intent(Intent.ActionView);
        intent.SetDataAndType(downloadFileUri, "application/vnd.android.package-archive");
        //intent.AddFlags(ActivityFlags.NewTask);

        intent.SetFlags(ActivityFlags.NewTask);
        intent.AddFlags(ActivityFlags.GrantReadUriPermission);

        _mContext.StartActivity(intent);
    }
}

intent.SetFlags(ActivityFlags.NewTask);
intent.AddFlags(ActivityFlags.GrantReadUriPermission);

<!-- Разрешить установку пакетов из неизвестных источников -->
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

<ItemGroup>                                                          
  <AndroidResource Include="Resources\drawable\splash_screen.xml" /> 
</ItemGroup>                                                         

<application 
    android:label="@string/ApplicationName" 
    android:theme="@style/MainTheme" 
    android:icon="@mipmap/icon"
    android:networkSecurityConfig="@xml/network_security_config">
  </application>

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
  <!-- Android 9.0+ 必须использоватьHTTPS -->
  <base-config cleartextTrafficPermitted="true" />
</network-security-config>

<Style x:Key="Separator" TargetType="BoxView">
    <Setter Property="HeightRequest" Value="1" />
    <Setter Property="HorizontalOptions" Value="FillAndExpand" />
    <Setter Property="Color" Value="Gray" />
    <Setter Property="Margin" Value="0, 5, 0, 5" />
    <Setter Property="Opacity" Value="0.5" />
</Style>

<BoxView Style="{StaticResource Separator}" />

<?xml version="1.0" encoding="utf-8"?>
<Archive>
  <Name>OneTree</Name>
  <PackageName>github.yiyungent.onetree</PackageName>
  <PackageVersionCode>1</PackageVersionCode>
  <PackageVersionName>0.4.0</PackageVersionName>
  <PackageFormat>apk</PackageFormat>
  <CreationDate>637619313170861804</CreationDate>
  <SolutionName>OneTree.App</SolutionName>
  <SolutionPath>F:\Com\me\Repos\OneTree.App\OneTree.App.sln</SolutionPath>
  <Status></Status>
  <Configuration>
    <DebugMode>false</DebugMode>
  </Configuration>
  <Comment />
  <LastUsedKeystore>C:\Users\yiyun\AppData\Local\Xamarin\Mono for Android\Keystore\yiyun\yiyun.keystore</LastUsedKeystore>
  <TimeStampingAuthority />
  <LastInsightsUploadDate>0</LastInsightsUploadDate>
</Archive>

jarsigner -verbose -keystore yiyun.keystore -signedjar signed.apk CoolApkDevVerify_no_sign.apk yiyun

jarsigner -verbose -keystore [Your signature storage path] -signedjar [signed filename] [unsigned filename] [Your alias key]

keytool -keystore yiyun.keystore -list  -v

keytool -keystore [your key store] -list -v

// Javascript код
console.log('{"width": "750"}');

// C#
public class TorchWebChromeClient : Android.Webkit.WebChromeClient
{

    public override void OnConsoleMessage(string message, int lineNumber, string sourceID)
    {
        // message Прямо сейчасдля JS Сообщение передается, и сообщение оценивается для определения метода вызова.
        base.OnConsoleMessage(message, lineNumber, sourceID);
    }

}

public class JSBridge : Java.Lang.Object
{
    readonly WeakReference<HybridWebViewRenderer> hybridWebViewRenderer;

    public JSBridge(HybridWebViewRenderer hybridRenderer)
    {
        hybridWebViewRenderer = new WeakReference<HybridWebViewRenderer>(hybridRenderer);
    }

    // Открытое имя метода: invokeAction
    [JavascriptInterface]
    [Export("invokeAction")]
    public void InvokeAction(string data)
    {
        HybridWebViewRenderer hybridRenderer;

        if (hybridWebViewRenderer != null && hybridWebViewRenderer.TryGetTarget(out hybridRenderer))
        {
            // вызов WebView
            ((HybridWebView)hybridRenderer.Element).InvokeAction(data);
        }
    }
}

[assembly: ExportRenderer(typeof(HybridWebView), typeof(HybridWebViewRenderer))]
namespace TorchView4Droid.Components
{
   public class HybridWebViewRenderer : WebViewRenderer
    {
        const string JavascriptFunction = "function invokeCSharpAction(data){jsBridge.invokeAction(data);}";
       
		protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
        {
            base.OnElementChanged(e);

            if (e.OldElement != null)
            {
                // Unsubscribe from event handlers

                Control.RemoveJavascriptInterface("jsBridge");
                ((HybridWebView)Element).Cleanup();
            }
            if (e.NewElement != null)
            {
				// 1.WebViewClient
                var webViewClient = new JavascriptWebViewClient(this, $"javascript: {JavascriptFunction}");
                Control.SetWebViewClient(webViewClient);
                // незащищенныйсуществовать jsBridge на объекте
                // Итак, наконец: jsBridge.invokeAction
                Control.AddJavascriptInterface(new JSBridge(this), "jsBridge");
            }
        }
    } 
}

public class JavascriptWebViewClient : FormsWebViewClient
{
    string _javascript;

    public JavascriptWebViewClient(HybridWebViewRenderer renderer, string javascript) : base(renderer)
    {
        _javascript = javascript;
    }

    public override void OnPageFinished(WebView view, string url)
    {
        base.OnPageFinished(view, url);
        // Инкапсулированная функция существует здесь Гарантировано выполнение один раз для инъекции
        view.EvaluateJavascript(_javascript, null);
    }
}

function invokeCSCode(data) {
    try {
        log("Sending Data:" + data);
        invokeCSharpAction(data);
    } catch (err) {
        log(err);
    }
}

public class JavascriptWebViewClient : FormsWebViewClient
{
    public override bool ShouldOverrideUrlLoading(WebView view, IWebResourceRequest request)
    {
        // перехватыватьurl, исследовать Url.Scheme 是否длятыдляjsвызовопределениеиз Scheme
        if (request.Url != null && request.Url.Scheme != null && request.Url.Scheme.ToLower() == "js")
        {
            // вызов C#
            // Можно получить из Query серединаанализироватьпереданные данные
            var queryPars = request.Url.QueryParameterNames;
            
            // Пример: Открыть локальную страницу
            // url = "js://openActivity?arg1=111&arg2=222"
            / ...
        }
        
		return base.ShouldOverrideUrlLoading(view, request);
    }
}

// JavaScript
function openActivity(){
    document.location = "js://openActivity?arg1=111&arg2=222";
}

webView.LoadUrl("javascript:returnResult(" + result + ")");

// JavaScript
function returnResult(result){
    alert("result is" + result);
}

// JavaScript
function clickPrompt(){
    // преимущество: Могу получить это C# возвращаемое значение метода
    var result = prompt("js://openActivity?arg1=111&arg2=222");
    alert("open activity " + result);
}

public class TorchWebChromeClient : Android.Webkit.WebChromeClient
{
    #region js Три диалоговых окна

    public override bool OnJsAlert(WebView view, string url, string message, JsResult result)
    {
        return base.OnJsAlert(view, url, message, result);
    }

    public override bool OnJsConfirm(WebView view, string url, string message, JsResult result)
    {
        return base.OnJsConfirm(view, url, message, result);
    }

    public override bool OnJsPrompt(WebView view, string url, string message, string defaultValue, JsPromptResult result)
    {
        // Уведомление: js Передайте данные о существовании message
        // message = "js://openActivity?arg1=111&arg2=222"
        Android.Net.Uri uri = Android.Net.Uri.Parse(message);
        string scheme = uri.Scheme;
        if (scheme != null && scheme.ToLower() == "js")
        {
            IList<string> queryPars = uri.QueryParameterNames?.ToList();


            // Представляет собой завершение внутренней обработки приложения.
            result.Confirm("success");

            return true;
        }

        return base.OnJsPrompt(view, url, message, defaultValue, result);
    }

    #endregion
}

// C#
mWebView.LoadUrl("javascript:show(" + result + ")");

// JavaScript
function show(result){
    alert("result"=result);
    return "success";
}

string jsFuncStr = "";
if ((int)Build.VERSION.SdkInt < 18)
{
    webView.LoadUrl(jsFuncStr);
}
else
{
    var jsCallback = new JsFuncValueCallback();
    webView.EvaluateJavascript(jsFuncStr, jsCallback);
}

#region JsFuncValueCallback
public class JsFuncValueCallback : Android.Webkit.IValueCallback
{
    public void OnReceiveValue(Object? value)
    {
      // value для js Возврат результатов

      // Конвертировать для string Метод записи происходит из: Xamarin.Forms.Platform.Android.JavascriptResult.
      string data = ((Java.Lang.String)value)?.ToString();

      // TODO: js Обработка возвращаемого значения
    }
        
    // ...
}
#endregion

file://xxxx/index.html

public override WebResourceResponse ShouldInterceptRequest( WebView view, IWebResourceRequest request ) {
}

{Java.Lang.IllegalStateException: AssetInputStream is closed
  at Java.Interop.JniEnvironment+InstanceMethods.CallNonvirtualIntMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args) [0x0008e] in <8b3b636835d84984ba4604c1f57b1983>:0 
  at Java.Interop.JniPeerMembers+JniInstanceMethods.InvokeNonvirtualInt32Method (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters) [0x0001f] in <8b3b636835d84984ba4604c1f57b1983>:0 
  at Android.Content.Res.AssetManager+AssetInputStream.Read (System.Byte[] b, System.Int32 off, System.Int32 len) [0x00052] in <44e54a86dea24313a2bdb807df77c27a>:0 
  at Android.Runtime.InputStreamInvoker.Read (System.Byte[] buffer, System.Int32 offset, System.Int32 count) [0x00006] in <44e54a86dea24313a2bdb807df77c27a>:0 
  at System.IO.Stream.CopyTo (System.IO.Stream destination, System.Int32 bufferSize) [0x0001f] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corert/src/System.Private.CoreLib/shared/System/IO/Stream.cs:179 
  at System.IO.Stream.CopyTo (System.IO.Stream destination) [0x00007] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corert/src/System.Private.CoreLib/shared/System/IO/Stream.cs:168 
  at (wrapper remoting-invoke-with-check) System.IO.Stream.CopyTo(System.IO.Stream)
  at TorchView.WebServer.TaskProc (System.Object obj) [0x000ac] in F:\Com\me\Repos\TorchView\src\TorchView\WebServer.cs:144 
  --- End of managed Java.Lang.IllegalStateException stack trace ---
java.lang.IllegalStateException: AssetInputStream is closed
	at android.content.res.AssetManager$AssetInputStream.ensureOpen(AssetManager.java:1364)
	at android.content.res.AssetManager$AssetInputStream.read(AssetManager.java:1303)
}

-dontwarn com.tencent.bugly.**
-keep public class com.tencent.bugly.**{*;}

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>portable</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\Release</OutputPath>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
    <AndroidManagedSymbols>true</AndroidManagedSymbols>
    <AndroidUseSharedRuntime>false</AndroidUseSharedRuntime>
    <AotAssemblies>false</AotAssemblies>
    <EnableLLVM>false</EnableLLVM>
    <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
    <BundleAssemblies>true</BundleAssemblies>
    <AndroidLinkTool>proguard</AndroidLinkTool>
</PropertyGroup>

<ItemGroup>
	<ProguardConfiguration Include="ProGuard.cfg" />
</ItemGroup>

#if DEBUG
[assembly: Application(Debuggable=true)]
#else
[assembly: Application(Debuggable=false)]
#endif

<PropertyGroup>
	<BundleAssemblies>true</BundleAssemblies>
</PropertyGroup>

Using ProGuard with the D8 DEX compiler is no longer supported. Please set the code shrinker to 'r8' in the Visual Studio project property pages or edit the project file in a text editor and set the 'AndroidLinkTool' MSBuild property to 'r8'.