找不到符号 public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine)

Posted 2023-02-23

【中文标题】找不到符号 public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine)

【英文标题】：cannot find symbol public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine)

【发布时间】：2020-09-27 15:24:13

【问题描述】：

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，android:name=".UniappApplication" 和 android:name=".MainActivity" 出现 Unresolved class 错误

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.orsac.bluis">

<application
    android:name=".UniappApplication" // Here
    android:label="BLUIS"
    android:usesCleartextTraffic="true"
    android:networkSecurityConfig="@xml/network_security_config"
    android:icon="@mipmap/ic_launcher">
    <activity
        android:name=".MainActivity" // Here
        android:launchMode="singleTop"
        android:theme="@style/LaunchTheme"
        android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
        android:hardwareAccelerated="true"
        android:windowSoftInputMode="adjustResize">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
        <intent-filter>
            <action android:name="FLUTTER_NOTIFICATION_CLICK" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>
    <!-- Don't delete the meta-data below.
         This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
    <meta-data
        android:name="flutterEmbedding"
        android:value="2" />
</application>

我尝试过的事情

Flutter clean
Flutter run
Invalidate caches and restart

【问题讨论】：

尝试清理并重建项目。

已经试过了

你试过导入io.flutter.embedding.engine.FlutterEngine

【参考方案1】：

你应该导入 androidx.annotation.NonNull;

import androidx.annotation.NonNull;