如何修复我的Application.java以使用新版本的Firebase_messaging

我今天已经升级了我所有的 firebase 软件包，我不得不升级到版本 8.0.0-dev.13 以进行 firebase 消息传递，即使由于依赖性问题它仍在开发中。在 Application.Java 中，我有：

package com.halloglobal.flutterapp.hallo;

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;
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin;
import io.flutter.view.FlutterMain;

public class Application extends FlutterApplication implements PluginRegistrantCallback {
@override
public void onCreate() {
super.onCreate();
FlutterFirebaseMessagingService.setPluginRegistrant(this);
}
@override
public void registerWith(PluginRegistry registry) {
FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
}
}

过去运行良好，但现在使用这个新版本，我收到此错误：注意：使用 -Xlint:deprecation 重新编译以获取详细信息。/Users/hallo/Documents/HalloMonoRepo/hallo/android/app/src/main/java/com/halloglobal/flutterapp/hallo/Application.java:7: 错误：包 io.flutter.plugins.firebasemessaging 不存在 import io .flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService; ^ /Users/hallo/Documents/HalloMonoRepo/hallo/android/app/src/main/java/com/halloglobal/flutterapp/hallo/Application.java:8: 错误：包 io.flutter.plugins.firebasemessaging 不存在导入io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin;

我需要如何更改我的 Application.java 才能使用新版本？

回答