android - 类 'Application' 不是抽象的，没有实现抽象成员 public abstract fun registerWith(p0 : PluginRegistry):

Question

当我在我的 macbook for ios 上运行我的 flutter 项目时，它运行正常，但在 android 上出现错误并显示此错误，如下所述:
e:/Users/satyamtripathi/Desktop/ChatApp/android/app/src/main/kotlin/com/example/myapp/Application.kt: (12, 1): 类'Application'不是抽象的并且不实现抽象成员public abstract fun registerWith(p0: PluginRegistry):在io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback中定义的单元
e:/Users/satyamtripathi/Desktop/ChatApp/android/app/src/main/kotlin/com/example/myapp/Application.kt: (18, 5): 'registerWith' 不覆盖任何内容
申请.kt

package com.example.myapp



import io.flutter.app.FlutterApplication;

import io.flutter.plugin.common.PluginRegistry;

import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;

import io.flutter.plugins.GeneratedPluginRegistrant;

import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService;


class Application : FlutterApplication(), PluginRegistrantCallback {

    override fun onCreate() {
        super.onCreate()
        FlutterFirebaseMessagingService.setPluginRegistrant(this)
    }
    override fun registerWith(registry: PluginRegistry?) {
        io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin.registerWith(registry?.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
    }
}

MainActivity.kt

package com.example.myapp


import androidx.annotation.NonNull

import io.flutter.plugins.GeneratedPluginRegistrant

import io.flutter.embedding.android.FlutterActivity

import io.flutter.embedding.engine.FlutterEngine


class MainActivity : FlutterActivity()
{

    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
        GeneratedPluginRegistrant.registerWith(flutterEngine);

    }
}

Answer 1

我变了

override fun registerWith(registry: PluginRegistry?)

对此

override fun registerWith(registry: PluginRegistry),