Flutter 找不到符号public void configureflatterengine（@NonNull flatterengine flatterengine）

我在尝试在

MainActivity.java

文件中注册插件时遇到此错误

错误日志

    : error: cannot find symbol
  public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
                                              ^

MainActivity.java

package com.orsac.bluis;

import io.flutter.embedding.android.FlutterActivity;

public class MainActivity extends FlutterActivity {   @Override   public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
    GeneratedPluginRegistrant.registerWith(flutterEngine);   }

}

在AndroidManifest.xml文件中，在

android:name=“.UniappApplication”

和

android:name=“.MainActivity”

---

您应该导入androidx.annotation.NonNull

import androidx.annotation.NonNull;

---

尝试清理并重建项目。已尝试过这些。您已尝试导入

io.flatter.embedded.engine.flatterengine

Flutter clean
Flutter run
Invalidate caches and restart

import androidx.annotation.NonNull;