它帮助了我:进入AndroidManifest并粘贴或替换此代码

<provider
        android:authorities="${applicationId}.here.this.library.provider"
        android:name="androidx.core.content.FileProvider"
        android:exported="false"
        android:grantUriPermissions="true"
        tools:replace="android:authorities" >

    </provider>

        need to use android:name="androidx.core.content.contentprovider 
        or android:name="androidx.core.content.provider insteadof 
        android:name="androidx.core.content.fileprovider

        <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="${applicationId}.contentprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/filepaths" />
    </provider>

是啊!我和你有同样的问题。就像你说的，你用了“变异”。保持“权威”的唯一性，你可以这样写

android:authorities="${applicationId}.provider"

如果你在一个应用程序中使用了不止一个lib，原因与上面相同。

如果你在Xamarin上，你得到这个错误(可能是因为Firebase.Crashlytics):

INSTALL_FAILED_CONFLICTING_PROVIDER
Package couldn't be installed in [...]
Can't install because provider name dollar_openBracket_applicationId_closeBracket (in package [...]]) is already used by [...]

正如这里提到的，你需要更新Xamarin.Build.Download:

Update the Xamarin.Build.Download Nuget Package to 0.4.12-preview3 On Mac, you may need to check Show pre-release packages in the Add Packages window Close Visual Studio Delete all cached locations of NuGet Packages: On Windows, open Visual Studio but not the solution: Tools -> Option -> Nuget Package Manager -> General -> Clear All Nuget Cache(s) On Mac, wipe the following folders: ~/.local/share/NuGet ~/.nuget/packages packages folder in solution Delete bin/obj folders in solution Load the Solution Restore Nuget Packages for the Solution (should run automatically) Rebuild

我本以为通过拖拽图标到“卸载”来卸载应用程序就能解决问题，但事实并非如此。

下面是解决问题的方法:

进入设置 选择应用程序 找到你的应用(是的，我很惊讶仍然在这里找到它!)并按下它 在右上角，按下3个点 选择“卸载所有用户”

再试一次，现在应该可以工作了。

我有这个错误，当实现一个库与以下AndroidmManifest.xml

<provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="library.path.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths"/>
    </provider>

当我在Project AndroidManifest.xml (app/src/main)中放入以下代码时，我解决了这个问题:

<provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="${applicationId}.provider"
        android:exported="false"
        android:grantUriPermissions="true"
        tools:replace="android:authorities">
    </provider>