PlatformException（NativeAdError，在flutter原生广告上找不到带有id的NativeAdFactory（android）

Question

我在 flutter 原生广告 (android) 上遇到此错误：

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PlatformException(NativeAdError, Can't find NativeAdFactory with id: homeScreen, null, null)

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google_mobile_ads: ^0.13.0\n

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这是我的 HomeScreenNativeAd.kt 文件

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class HomeScreenNativeAd(val context: Context) : GoogleMobileAdsPlugin.NativeAdFactory {\n\n    override fun createNativeAd(\n            nativeAd: NativeAd,\n            customOptions: MutableMap<String, Any>?\n    ): NativeAdView {\n        val homeScreenNativeView = LayoutInflater.from(context)\n                .inflate(R.layout.home_screen_native_ad, null) as NativeAdView\n\n        with(homeScreenNativeView) {\n            val attributionViewSmall =\n                    findViewById<TextView>(R.id.tv_home_item_native_ad_attribution_small)\n\n\n            val icon = findViewById<ImageView>(R.id.home_item_bg_image)\n\n\n            val image = nativeAd.icon\n            if (image != null) {\n                attributionViewSmall.visibility = View.VISIBLE\n                icon.setImageDrawable(image.drawable)\n            } else {\n                attributionViewSmall.visibility = View.INVISIBLE\n            }\n            this.iconView = iconView\n\n            val adV =   findViewById<TextView>(R.id.adviser)\n            adV.text = nativeAd.advertiser\n            this.advertiserView =adV\n\n            val ctaButton =   findViewById<TextView>(R.id.home_screen_cta_button)\n            ctaButton.text = nativeAd.callToAction\n            this.callToActionView = ctaButton\n\n            val adDesc =   findViewById<TextView>(R.id.home_item_ad_desc)\n            adDesc.text = nativeAd.body\n            this.bodyView = ctaButton\n\n\n\n            val headlineView = findViewById<TextView>(R.id.home_item_ad_title)\n            headlineView.text = nativeAd.headline\n            this.headlineView = headlineView\n\n\n\n\n            setNativeAd(nativeAd)\n        }\n\n        return homeScreenNativeView\n    }\n}\n

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home_screen_native_ad.xml 文件

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`

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<com.google.android.gms.ads.nativead.NativeAdView\n    xmlns:android="http://schemas.android.com/apk/res/android"\n    xmlns:app="http://schemas.android.com/apk/res-auto"\n    xmlns:tools="http://schemas.android.com/tools"\n    android:layout_width="match_parent"\n    android:layout_height="match_parent">\n    <FrameLayout\n        android:layout_width="match_parent"\n        android:layout_height="match_parent">\n        <RelativeLayout\n            android:orientation="vertical"\n            android:layout_width="wrap_content"\n\n            android:layout_height="160dp">\n\n\n\n            <FrameLayout\n                android:layout_width="match_parent"\n                android:background="#00ffffff"\n                android:layout_height="140dp"/>\n\n            <RelativeLayout\n\n                android:layout_width="match_parent"\n                android:layout_height="190dp"\n                android:layout_marginTop="16dp"\n                android:layout_marginEnd="16dp"\n                android:layout_marginBottom="16dp"\n                android:gravity="start"\n                android:orientation="horizontal">\n\n                <ImageView\n                    android:id="@+id/home_item_bg_image"\n                    android:layout_width="60dp"\n                    android:layout_height="60dp"\n                    android:scaleType="centerCrop"\n                    android:layout_marginLeft="16dp"\n\n\n                    />\n\n\n                <TextView\n                    android:id="@+id/home_item_ad_title"\n                    android:layout_width="220dp"\n\n                    android:layout_height="wrap_content"\n                    android:layout_marginLeft="10dp"\n                    android:layout_toRightOf="@+id/home_item_bg_image"\n                    android:ellipsize="end"\n                    android:lines="1"\n                    android:maxLines="1"\n                    android:textColor="#FFFFFFFF"\n                    android:textSize="20sp"\n                    tools:text="Headline" />\n\n                <TextView\n                    android:id="@+id/adviser"\n                    android:layout_width="229dp"\n                    android:layout_height="wrap_content"\n                    android:layout_marginLeft="10dp"\n                    android:layout_marginTop="32dp"\n                    android:layout_toRightOf="@+id/home_item_bg_image"\n                    android:ellipsize="end"\n                    android:lines="1"\n                    android:maxLines="1"\n                    android:textColor="#FFFFFFFF"\n                    android:textSize="14sp"\n                    tools:text="Advertiser" />\n\n\n                <TextView\n                    android:id="@+id/tv_home_item_native_ad_attribution_small"\n                    android:layout_width="35dp"\n                    android:layout_height="20dp"\n                    android:layout_marginLeft="10dp"\n                    android:layout_toRightOf="@+id/home_item_ad_title"\n                    android:background="@color/softOrange"\n                    android:gravity="center"\n                    android:lines="1"\n                    android:maxLines="1"\n                    android:text="Ad"\n                    android:textColor="#FFFF"\n                    android:textSize="12sp" />\n\n\n\n            </RelativeLayout>\n\n            <TextView\n                android:id="@+id/home_item_ad_desc"\n                android:layout_width="270dp"\n                android:layout_height="40dp"\n                android:layout_marginTop="85dp"\n                android:ellipsize="end"\n                android:lines="2"\n                android:gravity="center_vertical"\n                android:maxLines="2"\n                android:textColor="#FFFFFFFF"\n                android:textSize="14sp"\n                android:layout_marginLeft="16dp"\n                tools:text="Headline" />\n\n            <TextView\n                android:id="@+id/home_screen_cta_button"\n                android:layout_width="wrap_content"\n                android:layout_marginLeft="10dp"\n                android:layout_height="30dp"\n                android:layout_toRightOf="@+id/home_item_ad_desc"\n                android:layout_marginTop="100dp"\n                android:text="INSTALL"\n                android:gravity="center"\n                android:ellipsize="end"\n                android:lines="1"\n                android:textColor="#FFF"\n                android:maxLines="1"\n                android:textSize="18sp"\n                />\n\n\n        </RelativeLayout>\n    </FrameLayout>\n</com.google.android.gms.ads.nativead.NativeAdView>`\n

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MainActivity.kt

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`class MainActivity : FlutterActivity() {\n    private val CHANNEL = "verified.cv/channel" //The channel name you set in your main.dart file\n\n    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {\n        super.configureFlutterEngine(flutterEngine)\n        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler {\n            // Note: this method is invoked on the main thread.\n            call, result ->\n\n            if (call.method == "createNotificationChannel") {\n                val argData = call.arguments as java.util.HashMap<String, String>\n                val completed = createNotificationChannel(argData)\n                if (completed == true) {\n                    result.success(completed)\n                } else {\n                    result.error("Error Code", "Error Message", null)\n                }\n            } else {\n                result.notImplemented()\n            }\n        }\n        GoogleMobileAdsPlugin.registerNativeAdFactory(\n                flutterEngine, "listTile", ListTileNativeAdFactory(context))\n        GoogleMobileAdsPlugin.registerNativeAdFactory(\n                flutterEngine, "skillCard", SkillCardNativeFactory(context))\n        GoogleMobileAdsPlugin.registerNativeAdFactory(\n                flutterEngine, "homeScreen", HomeScreenNativeAd(context))\n        GoogleMobileAdsPlugin.registerNativeAdFactory(\n                flutterEngine, "feedItem", FeedItemNativeFactory(context))\n\n\n    }\n\n    override fun cleanUpFlutterEngine(flutterEngine: FlutterEngine) {\n        super.cleanUpFlutterEngine(flutterEngine)\n\n        // TODO: Unregister the ListTileNativeAdFactory\n        GoogleMobileAdsPlugin.unregisterNativeAdFactory(flutterEngine, "listTile")\n        GoogleMobileAdsPlugin.unregisterNativeAdFactory(flutterEngine, "skillCard")\n        GoogleMobileAdsPlugin.unregisterNativeAdFactory(flutterEngine, "homeScreen")\n        GoogleMobileAdsPlugin.unregisterNativeAdFactory(flutterEngine, "feedItem")\n\n\n\n    }\n\n    private fun createNotificationChannel(mapData: HashMap<String, String>): Boolean {\n        val completed: Boolean\n        if (VERSION.SDK_INT >= VERSION_CODES.O) {\n            // Create the NotificationChannel\n            val id = mapData["id"]\n            val name = mapData["name"]\n            val descriptionText = mapData["description"]\n            // val sound = "your_sweet_sound"\n            val importance = NotificationManager.IMPORTANCE_HIGH\n            val mChannel = NotificationChannel(id, name, importance)\n            mChannel.description = descriptionText\n\n            // val soundUri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + getApplicationContext().getPackageName() + "/raw/your_sweet_sound");\n            // val att = AudioAttributes.Builder()\n            //         .setUsage(AudioAttributes.USAGE_NOTIFICATION)\n            //         .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)\n            //         .build();\n\n            //mChannel.setSound(soundUri, att)\n            // Register the channel with the system; you can't change the importance\n            // or other notification behaviors after this\n            val notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager\n            notificationManager.createNotificationChannel(mChannel)\n            completed = true\n        } else {\n            completed = false\n        }\n        return completed\n    }\n}\n`\n

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\nI/flutter ( 1409): ----------------FIREBASE CRASHLYTICS----------------\nI/flutter ( 1409): PlatformException(NativeAdError, Can't find NativeAdFactory with id: homeScreen, null, null)\nI/flutter ( 1409): #0      StandardMethodCodec.decodeEnvelope\npackage:flutter/\xe2\x80\xa6/services/message_codecs.dart:607\nI/flutter ( 1409): #1      MethodChannel._invokeMethod\npackage:flutter/\xe2\x80\xa6/services/platform_channel.dart:177\nI/flutter ( 1409): <asynchronous suspension>\nI/flutter ( 1409): #2      NativeAd.load\npackage:google_mobile_ads/src/ad_containers.dart:1033\nI/flutter ( 1409): <asynchronous suspension>\nI/flutter ( 1409): ----------------------------------------------------\nD/ACodec  ( 1409): dataspace changed to 0x10c40000 (R:2(Limited), P:4(BT601_6_525), M:3(BT601_6), T:3(SMPTE170M)) (\n

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