entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://developer.xamarin.com/guides/android/platform_features/introduction-to-oreo/|1|IMAGE|IMMUTABLE|imageUrl|https://i.stack.imgur.com/Ny0ZO.png|imageAlt|2|https://i.stack.imgur.com/h0niZ.png|blocks|key|8vo8l|text|首先，请务必查看有关新特性的最新xamarin文档。https://developer.xamarin.com/guides/android/platform|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|7d89j|我很快创建了一个新的xamarin+android项目，并添加了两个不同字体的文本视图：|bphku|​|5h3gt|?|atomic|8b1ov|25bld|我的解决方案如下所示：|13j01|80lq5|e214r|2pps1|我通常尽量避免在资源名称中使用大写字母，因为android工作室对此颇有微词。|berb2|主布局：|1tjfe|<?xml+version="1.0"+encoding="utf-8"?>
<LinearLayout+xmlns:android="http://schemas.android.com/apk/res/android"
++++android:orientation="vertical"
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"+>

++<TextView
++++android:text="Pacifico+example+text"
++++android:layout_width="wrap_content"
++++android:layout_height="wrap_content"
++++android:fontFamily="@font/pacifico"+/>

++<TextView
++android:text="Roboto+light+example+text"
++android:layout_width="wrap_content"
++android:layout_height="wrap_content"
++android:fontFamily="@font/roboto_light"+/>

</LinearLayout>|code-block|syntax|javascript|b1jvf|我认为你没有使用最新的平台来构建。检查您是否使用最新的平台(Oreo)来构建应用程序。|9t82t^0|Q|1H|0|0|0|0|0|1|1|0|0|0|0|0|1|2|0|0|0|0|0|0^^$0|$1|$2|3|4|5|6|$7|8]]|9|$2|A|4|B|6|$C|D|E|-4]]|F|$2|A|4|B|6|$C|G|E|-4]]]|H|@$I|J|K|L|2|M|N|1H|O|@]|P|@$Q|1I|R|1J|I|1K]]|6|$]]|$I|S|K|T|2|M|N|1L|O|@]|P|@]|6|$]]|$I|U|K|V|2|M|N|1M|O|@]|P|@]|6|$]]|$I|W|K|X|2|Y|N|1N|O|@]|P|@$Q|1O|R|1P|I|1Q]]|6|$]]|$I|Z|K|V|2|M|N|1R|O|@]|P|@]|6|$]]|$I|10|K|11|2|M|N|1S|O|@]|P|@]|6|$]]|$I|12|K|V|2|M|N|1T|O|@]|P|@]|6|$]]|$I|13|K|X|2|Y|N|1U|O|@]|P|@$Q|1V|R|1W|I|1X]]|6|$]]|$I|14|K|V|2|M|N|1Y|O|@]|P|@]|6|$]]|$I|15|K|16|2|M|N|1Z|O|@]|P|@]|6|$]]|$I|17|K|18|2|M|N|20|O|@]|P|@]|6|$]]|$I|19|K|1A|2|1B|N|21|O|@]|P|@]|6|$1C|1D]]|$I|1E|K|1F|2|M|N|22|O|@]|P|@]|6|$]]|$I|1G|K|-4|2|M|N|23|O|@]|P|@]|6|$]]]]

First always check out the latest xamarin documentation about new features.
<a href="https://developer.xamarin.com/guides/android/platform_features/introduction-to-oreo/" rel="nofollow noreferrer">https://developer.xamarin.com/guides/android/platform_features/introduction-to-oreo/</a>

I quickly created a new xamarin android project and added two textviews with diffrent fonts:

<a href="https://i.stack.imgur.com/Ny0ZO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Ny0ZO.png" alt="Test App"></a>

My solution looks as the following:

<a href="https://i.stack.imgur.com/h0niZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/h0niZ.png" alt="Solution"></a>

I usually try to avoid capital letters in resource names as the android studio complains about it.

Main Layout:

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="match_parent"
 android:layout_height="match_parent" &gt;

 &lt;TextView
 android:text="Pacifico example text"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:fontFamily="@font/pacifico" /&gt;

 &lt;TextView
 android:text="Roboto light example text"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:fontFamily="@font/roboto_light" /&gt;

&lt;/LinearLayout&gt;
</code></pre>

I think that you do not use the latest platform to build.
Check that you use the latest platform (Oreo) to build the application.

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://i.stack.imgur.com/5t9ml.png|imageAlt|blocks|key|4fqcp|text|对我来说，解决方案是从SDK管理器中删除所有旧的Android+SDK构建工具。现在我只安装了适用于api+level+26和27的api，它可以正常工作。|unstyled|depth|inlineStyleRanges|entityRanges|b241k|​|cpk4b|?|atomic|offset|length|1987s|4m153^0|0|0|0|1|0|0|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]]|A|@$B|C|D|E|2|F|G|S|H|@]|I|@]|6|$]]|$B|J|D|K|2|F|G|T|H|@]|I|@]|6|$]]|$B|L|D|M|2|N|G|U|H|@]|I|@$O|V|P|W|B|X]]|6|$]]|$B|Q|D|K|2|F|G|Y|H|@]|I|@]|6|$]]|$B|R|D|-4|2|F|G|Z|H|@]|I|@]|6|$]]]]

For me the solution was to remove all the old Android SDK Build Tools from the SDK Manager. Now I only have for api level 26 and 27 installed and it works.

<a href="https://i.stack.imgur.com/5t9ml.png" rel="noreferrer"><img src="https://i.stack.imgur.com/5t9ml.png" alt="enter image description here"></a>

entityMap|blocks|key|an2nq|text|我对这个问题的解决方案是在项目文件的根目录中添加以下行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|8pflt|<PropertyGroup><AndroidSdkBuildToolsVersion>27.0.3</AndroidSdkBuildToolsVersion></PropertyGroup>|code-block|syntax|javascript|8rf9k^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|J|9|@]|A|@]|B|$F|G]]|$2|H|4|-4|6|7|8|K|9|@]|A|@]|B|$]]]]

My resolution for this problem was to add the following line in the root of the project file

<pre><code>&lt;PropertyGroup&gt;&lt;AndroidSdkBuildToolsVersion&gt;27.0.3&lt;/AndroidSdkBuildToolsVersion&gt;&lt;/PropertyGroup&gt;
</code></pre>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://forums.xamarin.com/discussion/106768/invalid-resource-directory-name-obj-debug-res-fonts|blocks|key|fca33|text|正确的答案在invalid+resource+directory中。您必须在资源/字体中添加字体并清除重建|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|5i0r5^0|6|Q|0|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|L|G|@]|H|@$I|M|J|N|A|O]]|6|$]]|$A|K|C|-4|2|E|F|P|G|@]|H|@]|6|$]]]]

the right answer is in 
<a href="https://forums.xamarin.com/discussion/106768/invalid-resource-directory-name-obj-debug-res-fonts" rel="nofollow noreferrer">invalid resource directory</a>.
you must add fonts in assets/fonts and clean Rebuild

I just upgraded Visual Studio for mac to support Android 8 / api 26. I updated the AppCompat library to 26.1 to use the new font folder in the Resources directory of my Android project. Now when I try to compile I get "Invalid resource directory name" for path "obj/Debug/res/font" APT0000.

<a href="https://i.stack.imgur.com/XyHIo.png" rel="noreferrer"><img src="https://i.stack.imgur.com/XyHIo.png" alt="Error message"></a>

<a href="https://i.stack.imgur.com/m5itD.png" rel="noreferrer"><img src="https://i.stack.imgur.com/m5itD.png" alt="Resources folder"></a>

<a href="https://i.stack.imgur.com/Zl921.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Zl921.png" alt="Xamarin android version"></a>

Invalid resource directory name "font" Xamarin Android

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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 我刚刚升级了Visual Studio for mac以支持Android 8/ api 26。我将AppCompat库更新为26.1，以使用我的Android项目的Resources目录中的新字体文件夹。现在，当我尝试编译时，我得到路径"obj/Debug/res/font“APT0000的”无效资源目录名“。 ​...

问无效的资源目录名称"font“Xamarin Android
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问无效的资源目录名称"font“Xamarin AndroidEN