我正在尝试调试我的 android 应用程序，但不幸的是它给出了异常： Java.Lang.RuntimeException: 'Unable to get provider android.support.v4.content.fileprovider: java.lang.ClassnotFoundException: Didn't find class "android.support.v4.content.fileprovider" on path: DexPathList[[zip file "/data/app/com.companyname.finalproject_pu-1/base.apk"],nativelibraryDirectories=[/data/app/com.companyname.finalproject_pu-1/lib/arm64,/data/app/com.companyname.finalproject_pu-1/base.apk!/lib/arm64-v8a,/vendor/lib64,/system/lib64]]' 我试过了：

1. Bin/对象删除
2. 构建重建
3. 我在清单文件中添加了一个代码：

    <provider
   android:name="android.support.v4.content.fileprovider"
   android:authorities="com.companyname.finalproject_pu.fileprovider"
   android:granturiPermissions="true"
   android:exported="false">

   <meta-data
      android:name="android.support.FILE_PROVIDER_PATHS"
      android:resource="@xml/file_paths" />
</provider>

我原来的提供者代码是：

<provider android:name="xamarin.essentials.fileProvider" android:authorities="com.companyname.finalproject_pu.fileprovider" 
android:exported="false" 
android:granturiPermissions="true">
      <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" />
      
      <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
    </provider>