如何将片段活动添加到MainActivity.java或MainAcyivity.kt

如何解决如何将片段活动添加到MainActivity.java或MainAcyivity.kt

我正在尝试在Flutter应用中构建指纹识别器，而我正在使用local_auth package ...问题是我总是低于错误-

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

我尝试将FragmentActivity添加到MainActivity.kt，但是它不起作用..这是文件夹的结构...所以我应该创建MainActivity.java吗？我应该在哪里将MainActivity.java放在文件夹中？

这是我MainActivity.kt的内容

package com.project

import androidx.annotation.NonNull;
import io.Flutter.embedding.android.FlutterActivity
import io.Flutter.embedding.engine.FlutterEngine
import io.Flutter.plugins.GeneratedpluginRegistrant

class MainActivity: FlutterActivity() {
    override fun configureFlutterEngine(@NonNull FlutterEngine: FlutterEngine) {
        GeneratedpluginRegistrant.registerWith(FlutterEngine);
    }
}

解决方法

这里是如何用Kotlin做到

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;

import android.os.Build
import android.view.WindowManager
import android.view.ViewTreeObserver


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