xamarin - "No resource found..."尝试编译空白的跨平台 Xamarin 应用程序

Question

我使用的是 VS Community 2015，更新 3。我通过 VS 安装程序安装了 Xamarin v4.2，然后通过 Xamarin 安装程序更新到 4.2.1.60。

我创建了一个新的跨平台项目:空白应用程序(Xamarins.Forms Portable)。我将 Droid 项目设置为 Startup Project，然后右键单击 BlankApp1.Droid 尝试编译 Android 项目。

我收到以下编译错误:(错误位于文件 styles.xml 中)

No resource found that matches the given name: attr 'windowActionBar'.
No resource found that matches the given name: attr 'windowNoTitle'.
No resource found that matches the given name: attr 'colorPrimaryDark'.
No resource found that matches the given name: attr 'colorPrimary'.
Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light.DarkActionBar'.
No resource found that matches the given name: attr 'colorAccent'.
Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light.Dialog'.
No resource found that matches the given name: attr 'colorAccent'.
No resource found that matches the given name: attr 'windowActionModeOverlay'.

样式.xml:

<?xml version="1.0" encoding="utf-8" ?>
<resources>
  <style name="MainTheme" parent="MainTheme.Base">
  </style>
  <!-- Base theme applied no matter what API -->
  <style name="MainTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
    <!--If you are using revision 22.1 please use just windowNoTitle. Without android:-->
    <item name="windowNoTitle">true</item>
    <!--We will be using the toolbar so no need to show ActionBar-->
    <item name="windowActionBar">false</item>
    <!-- Set theme colors from http://www.google.com/design/spec/style/color.html#color-color-palette -->
    <!-- colorPrimary is used for the default action bar background -->
    <item name="colorPrimary">#2196F3</item>
    <!-- colorPrimaryDark is used for the status bar -->
    <item name="colorPrimaryDark">#1976D2</item>
    <!-- colorAccent is used as the default value for colorControlActivated
         which is used to tint widgets -->
    <item name="colorAccent">#FF4081</item>
    <!-- You can also set colorControlNormal, colorControlActivated
         colorControlHighlight and colorSwitchThumbNormal. -->
    <item name="windowActionModeOverlay">true</item>
    <item name="android:datePickerDialogTheme">@style/AppCompatDialogStyle</item>
  </style>

  <style name="AppCompatDialogStyle" parent="Theme.AppCompat.Light.Dialog">
    <item name="colorAccent">#FF4081</item>
  </style>
</resources>

包配置:

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Xamarin.Android.Support.Animated.Vector.Drawable" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Android.Support.Design" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Android.Support.v4" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Android.Support.v7.AppCompat" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Android.Support.v7.CardView" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Android.Support.v7.MediaRouter" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Android.Support.v7.RecyclerView" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Android.Support.Vector.Drawable" version="23.3.0" targetFramework="monoandroid60" />
  <package id="Xamarin.Forms" version="2.3.2.127" targetFramework="monoandroid60" />
</packages>

该项目设置为使用最新的 Android 版本 = 6.0 进行编译。

我还将 Xamarin.Forms Nuget 包从 2.2.0.45 更新到 2.3.2.127。我得到相同的错误列表(尽管奇怪的是，错误的顺序不同......)

对于问题是什么以及如何解决有什么想法吗？

Answer 1

导航至:

C:\Users\username\AppData\Local\Xamarin\zips

找到此 zip 文件:

2A3A8A6D6826EF6CC653030E7D695C41.zip

现在删除此文件，然后返回 Visual Studio 并重建解决方案。根据您的连接速度，需要一些时间才能完全下载该文件，大约 200mb。