笔记 | Xamarin

// 专用外部存储目录
// /storage/emulated/0/Android/data/com.companyname.app/files/
Android.Content.Context.GetExternalFilesDir(string type)

// 主外部存储目录
// /storage/emulated/0/
Android.OS.Environment.ExternalStorageDirectory

//global::Android.OS.Environment.ExternalStorageDirectory.AbsolutePath :得到安卓的根目录
//Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)：:得到安卓data目录
var path = global::Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);

// 创建文件
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="首页" Icon="icon_about.png">
    <ShellContent Route="HomePage" ContentTemplate="{DataTemplate local:HomePage}" />
</FlyoutItem>
<FlyoutItem Title="列表" Icon="icon_feed.png">
    <ShellContent Route="ItemsPage" ContentTemplate="{DataTemplate local:ItemsPage}" />
</FlyoutItem>
<FlyoutItem Title="设置" 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>

<!-- 显示在底部导航栏 -->
<FlyoutItem Title="首页" Icon="icon_about.png">
    <Tab Title="首页" Icon="icon_about.png">
        <ShellContent x:Name="HotPageItem" 
                      Title="热门"
                      ContentTemplate="{DataTemplate local:HotPage}" />
        <ShellContent x:Name="RecomPageItem" 
                      Title="推荐"
                      ContentTemplate="{DataTemplate local:RecomPage}" />
        <ShellContent x:Name="LastPageItem" 
                      Title="最新"
                      ContentTemplate="{DataTemplate local:LastPage}" />
    </Tab>
    <Tab Title="游戏" Icon="icon_feed.png">
        <ShellContent ContentTemplate="{DataTemplate local:ItemsPage}" />
    </Tab>
    <Tab Title="频道" Icon="icon_feed.png">
        <ShellContent ContentTemplate="{DataTemplate local:ItemsPage}" />
    </Tab>
    <Tab Title="动态" Icon="icon_feed.png">
        <ShellContent ContentTemplate="{DataTemplate local:ItemsPage}" />
    </Tab>
</FlyoutItem>
<!-- 显示在侧边浮出栏 -->
<FlyoutItem Title="关于" Icon="icon_about.png">
    <ShellContent ContentTemplate="{DataTemplate local:HomePage}" />
</FlyoutItem>
<FlyoutItem Title="设置" Icon="icon_setting.png">
    <ShellContent ContentTemplate="{DataTemplate local:SettingPage}" />
</FlyoutItem>

<Tab Title="首页" Icon="icon_about.png" CurrentItem="{x:Reference RecomPageItem}">
    <ShellContent x:Name="HotPageItem" 
                  Title="热门"
                  ContentTemplate="{DataTemplate local:HotPage}" />
    <ShellContent x:Name="RecomPageItem" 
                  Title="推荐"
                  ContentTemplate="{DataTemplate local:RecomPage}" />
    <ShellContent x:Name="LastPageItem" 
                  Title="最新"
                  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);

         // 注意: 直接从文件中 安装apk 和 从下载管理器中安装 不一样
         // 获取下载文件的Uri
         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>
  <!-- 访问网络状态权限 -->
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <!-- 读写外部存储权限 -->
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  <!-- 访问网络权限 -->
  <uses-permission android:name="android.permission.INTERNET" />
  <!-- 在SDCard中创建与删除文件权限 -->
  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
  <!-- 允许安装未知来源安装包 -->
  <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/安装目录-->
  <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" />

//下载到本地后执行安装
private void InstallAPK()
{
    // 获取下载文件的Uri
    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);

<!-- 允许安装未知来源安装包 -->
<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+ 必须使用HTTPS -->
  <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 代码
console.log('{"width": "750"}');

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

    public override void OnConsoleMessage(string message, int lineNumber, string sourceID)
    {
        // message 即为 JS 传过来的消息，判断消息来决定调用方法
        base.OnConsoleMessage(message, lineNumber, sourceID);
    }

}

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

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

    // 暴露方法名: invokeAction
    [JavascriptInterface]
    [Export("invokeAction")]
    public void InvokeAction(string data)
    {
        HybridWebViewRenderer hybridRenderer;

        if (hybridWebViewRenderer != null && hybridWebViewRenderer.TryGetTarget(out hybridRenderer))
        {
            // 调用 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);
                // 暴露在 jsBridge 对象上
                // 于是最终: 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);
        // 封装的函数被在此处 保证执行了一次，以注入
        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)
    {
        // 拦截url, 检查 Url.Scheme 是否为你为js调用定义的 Scheme
        if (request.Url != null && request.Url.Scheme != null && request.Url.Scheme.ToLower() == "js")
        {
            // 调用 C#
            // 可以从 Query 中解析传过来的数据
            var queryPars = request.Url.QueryParameterNames;
            
            // 举例: 打开本地页面
            // 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(){
    // 优点: 可以拿到 C# 方法返回值
    var result = prompt("js://openActivity?arg1=111&arg2=222");
    alert("open activity " + result);
}

public class TorchWebChromeClient : Android.Webkit.WebChromeClient
{
    #region js 三对话框

    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)
    {
        // 注意: js 传过来的数据在 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();


            // 代表应用内部处理完成
            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 为 js 返回的结果

      // 转换为 string 写法来自:Xamarin.Forms.Platform.Android.JavascriptResult
      string data = ((Java.Lang.String)value)?.ToString();

      // TODO: js 返回值处理
    }
        
    // ...
}
#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'.