VS2017 Xamarin开发Android应用时RecyclerView布局报错求助

Hey there, let's work through this RecyclerView error you're hitting. I've dealt with this exact issue before, so here are the most reliable fixes to try:

• Double-check your AXML namespace and tag spelling
  The error often pops up if the design tool can't recognize the RecyclerView component. Make sure your root layout includes the necessary namespace, and that you've spelled the RecyclerView tag correctly. Here's a working example to reference:

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical">
  
      <android.support.v7.widget.RecyclerView
          android:id="@+id/recyclerView"
          android:layout_width="match_parent"
          android:layout_height="match_parent" />
  
  </LinearLayout>
  

  Ensure there are no typos in android.support.v7.widget.RecyclerView—even a missing dot or wrong case can trigger this error.

• Verify your NuGet package installation
  Even if you added the 23.1.1 package, sometimes references get messed up. Try these steps:

  1. Right-click your Android project → Manage NuGet Packages
  2. Uninstall the Xamarin.Android.Support.v7.RecyclerView package
  3. Clean your solution (Build → Clean Solution)
  4. Reinstall the 23.1.1 version of the package
  5. Rebuild your solution

• Clear the Visual Studio design cache
  VS2017's Android designer can hold onto old cached data that causes false errors. Do this:

  1. Close Visual Studio completely
  2. Delete the bin and obj folders from your project directory
  3. Reopen VS, load your project, and rebuild it

• Match your target Android API level to the support library version
  The 23.1.1 support library is built for Android 6.0 (API level 23). Make sure your project's target framework is set correctly:

  1. Right-click your Android project → Properties
  2. Go to the Application tab
  3. Under "Compile using Android version (Target framework)", select Android 6.0 (API 23) or higher
  4. Save changes and rebuild

Start with the first fix since that's the most common culprit, then work your way down. Let me know if any of these resolve your issue!

内容的提问来源于stack exchange，提问作者JosMelka