在flutter中配置local_auth插件

我的项目使用 kotlin，当我想使用 Local_auth 插件时，出现以下错误：

PlatformException(no_fragment_activity, local_auth plugin requires activity to be a FragmentActivity., null)

local_auth 的示例所说的是：

package io.flutter.plugins.localauthexample;

import io.flutter.embedding.android.FlutterFragmentActivity;
import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.plugins.localauth.LocalAuthPlugin;

public class MainActivity extends FlutterFragmentActivity {
  // TODO(bparrishMines): Remove this once v2 of GeneratedPluginRegistrant rolls to stable. https://github.com/flutter/flutter/issues/42694
  @Override
  public void configureFlutterEngine(FlutterEngine flutterEngine) {
    flutterEngine.getPlugins().add(new LocalAuthPlugin());
  }
}

and

package io.flutter.plugins.localauthexample;

import android.os.Bundle;
import io.flutter.app.FlutterFragmentActivity;
import io.flutter.plugins.GeneratedPluginRegistrant;

public class EmbeddingV1Activity extends FlutterFragmentActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    GeneratedPluginRegistrant.registerWith(this);
  }
}

但问题是我不了解 kotlin，也不知道如何创建我的 kotlin 文件。

另外，我猜（我不确定），它可能是新版本中颤振的一个错误。

改变MainActivity.kt文件的代码为此

import androidx.annotation.NonNull;
import io.flutter.embedding.android.FlutterFragmentActivity
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugins.GeneratedPluginRegistrant

class MainActivity: FlutterFragmentActivity() {
    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
        GeneratedPluginRegistrant.registerWith(flutterEngine);
    }
}