Flutter本地通知“无法处理方法调用”

我想在应用程序上显示通知，但收到通知时出现此错误。

D/FLTFireMsgReceiver(14099): broadcast received for message
E/MethodChannel#dexterous.com/flutter/local_notifications(14099): Failed to handle method call
E/MethodChannel#dexterous.com/flutter/local_notifications(14099): java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.setSmallIcon(FlutterLocalNotificationsPlugin.java:425)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.createNotification(FlutterLocalNotificationsPlugin.java:326)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.showNotification(FlutterLocalNotificationsPlugin.java:1146)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.show(FlutterLocalNotificationsPlugin.java:1462)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.onMethodCall(FlutterLocalNotificationsPlugin.java:1299)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:258)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:322)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at android.os.Handler.handleCallback(Handler.java:938)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at android.os.Handler.dispatchMessage(Handler.java:99)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at android.os.Looper.loopOnce(Looper.java:233)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at android.os.Looper.loop(Looper.java:334)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at android.app.ActivityThread.main(ActivityThread.java:8399)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:582)
E/MethodChannel#dexterous.com/flutter/local_notifications(14099):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1068)
E/flutter (14099): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(error, Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference, null, java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
E/flutter (14099):  at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.setSmallIcon(FlutterLocalNotificationsPlugin.java:425)
E/flutter (14099):  at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.createNotification(FlutterLocalNotificationsPlugin.java:326)
E/flutter (14099):  at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.showNotification(FlutterLocalNotificationsPlugin.java:1146)
E/flutter (14099):  at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.show(FlutterLocalNotificationsPlugin.java:1462)
E/flutter (14099):  at com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin.onMethodCall(FlutterLocalNotificationsPlugin.java:1299)
E/flutter (14099):  at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:258)
E/flutter (14099):  at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
E/flutter (14099):  at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:322)
E/flutter (14099):  at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/flutter (14099):  at android.os.Handler.handleCallback(Handler.java:938)
E/flutter (14099):  at android.os.Handler.dispatchMessage(Handler.java:99)
E/flutter (14099):  at android.os.Looper.loopOnce(Looper.java:233)
E/flutter (14099):  at android.os.Looper.loop(Looper.java:334)
E/flutter (14099):  at android.app.ActivityThread.main(ActivityThread.java:8399)
E/flutter (14099):  at java.lang.reflect.Method.invoke(Native Method)
E/flutter (14099):  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:582)
E/flutter (14099):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1068)
E/flutter (14099): )
E/flutter (14099): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:653:7)
E/flutter (14099): #1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:315:18)
E/flutter (14099): <asynchronous suspension>
E/flutter (14099): #2      FlutterLocalNotificationsPlugin.show (package:flutter_local_notifications/src/flutter_local_notifications_plugin.dart:239:7)
E/flutter (14099): <asynchronous suspension>
E/flutter (14099):

以下是我的manifest文件：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.aleyia_azadari_schedule"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://schemas.android.com/apk/res/android ">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission
        android:name="com.google.android.gms.permission.AD_ID"
        tools:node="remove" />

    <queries>
        <intent>
            <action android:name="android.intent.action.SENDTO" />
            <data android:scheme="mailto" />
        </intent>
    </queries>

    <application
        android:label="Azadari Schedule"
        android:name="${applicationName}"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            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"
            android:usesCleartextTraffic="true"
            android:showWhenLocked="true"
            android:turnScreenOn="true">
            <!-- Specifies an Android theme to apply to this Activity as soon as
                 the Android process has started. This theme is visible to the user
                 while the Flutter UI initializes. After that, this theme continues
                 to determine the Window background behind the Flutter UI. -->
            <meta-data
                android:name="io.flutter.embedding.android.NormalTheme"
                android:resource="@style/NormalTheme" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </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" />
        <meta-data
            android:name="google_analytics_adid_collection_enabled"
            android:value="false" />
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_channel_id"
            android:value="high_importance_channel" />

    </application>
</manifest>

我的图标文件夹的图像

图像以红色显示发射架名称

我被这个问题困住了，解决的办法很好。
下面是我的代码：

//local notification initialization
  void initLocalNotifications(BuildContext context, RemoteMessage message) async{
    var androidInitializationSettings = AndroidInitializationSettings('@mipmap/ic_launcher');
    var initializationSetting = InitializationSettings(
        android: androidInitializationSettings
    );

    await _flutterLocalNotificationsPlugin.initialize(
      initializationSetting,
      onDidReceiveNotificationResponse: (payload){

      }
    );
  }

flutter_local_notifications：^13.0.0本地通知版本。

Flutter本地通知“无法处理方法调用”

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