Flutter - Flutter 中 Admob 的factoryId 是什么？

Question

我正在使用这个插件

此插件中的 Admob factoryId 是什么..

我从哪里获得 admob 广告的factoryId？

因为当我尝试调用原生广告时，我收到此错误

E/flutter (19354): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: PlatformException(NativeAdError, Can't find NativeAdFactory with id: FLTGoogleMobileAdsPlugin, null, null)
E/flutter (19354): #0      StandardMethodCodec.decodeEnvelope
package:flutter/…/services/message_codecs.dart:581
E/flutter (19354): #1      MethodChannel._invokeMethod
package:flutter/…/services/platform_channel.dart:158
E/flutter (19354): <asynchronous suspension>
E/flutter (19354): #2      NativeAd.load
package:google_mobile_ads/src/ad_containers.dart:576
E/flutter (19354): <asynchronous suspension>
E/flutter (19354):

这是我的原生广告类

class NativeAdWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => NativeAdState();
}

class NativeAdState extends State<NativeAdWidget> {
  NativeAd _nativeAd;
  final Completer<NativeAd> nativeAdCompleter = Completer<NativeAd>();

  @override
  void initState() {
    super.initState();
    _nativeAd = NativeAd(
      adUnitId: NativeAd.testAdUnitId,
      request: AdRequest(),
      factoryId: 'adFactoryExample',
      listener: AdListener(
        onAdLoaded: (Ad ad) {
          print('$NativeAd loaded.');
          nativeAdCompleter.complete(ad as NativeAd);
        },
        onAdFailedToLoad: (Ad ad, LoadAdError error) {
          ad.dispose();
          print('$NativeAd failedToLoad: $error');
          nativeAdCompleter.completeError(null);
        },
        onAdOpened: (Ad ad) => print('$NativeAd onAdOpened.'),
        onAdClosed: (Ad ad) => print('$NativeAd onAdClosed.'),
        onApplicationExit: (Ad ad) => print('$NativeAd onApplicationExit.'),
      ),
    );
    Future<void>.delayed(Duration(seconds: 1), () => _nativeAd?.load());
  }

  @override
  void dispose() {
    super.dispose();
    _nativeAd?.dispose();
    _nativeAd = null;
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<NativeAd>(
      future: nativeAdCompleter.future,
      builder: (BuildContext context, AsyncSnapshot<NativeAd> snapshot) {
        Widget child;

        switch (snapshot.connectionState) {
          case ConnectionState.none:
          case ConnectionState.waiting:
          case ConnectionState.active:
            child = Container();
            break;
          case ConnectionState.done:
            if (snapshot.hasData) {
              child = AdWidget(ad: _nativeAd);
            } else {
              child = Text('Error loading $NativeAd');
            }
        }

        return Container(
          width: 250,
          height: 350,
          child: child,
          color: Colors.blueGrey,
        );
      },
    );
  }
}

我这样称呼原生广告

adWidget = NativeAdWidget(),

也许我收到此错误是因为我的factoryid 为空？

我使用了这个插件的横幅广告，效果很好..

Answer 1

工厂id是您在MainActivity文件中配置或注册的id，java或kotiln，它代表您的自定义

NativeAdFactory

类

如果您查看评论中也提供的admob代码实验室，您会看到他们在这里注册了factoryId

class MainActivity: FlutterActivity() {

    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
        super.configureFlutterEngine(flutterEngine)

        // TODO: Register the ListTileNativeAdFactory
        GoogleMobileAdsPlugin.registerNativeAdFactory(
                flutterEngine, "listTile", ListTileNativeAdFactory(context))
    }

    ...
}

然后他们在清理这里时取消注册

class MainActivity: FlutterActivity() {
    ...

    override fun cleanUpFlutterEngine(flutterEngine: FlutterEngine) {
        super.cleanUpFlutterEngine(flutterEngine)

        // TODO: Unregister the ListTileNativeAdFactory
        GoogleMobileAdsPlugin.unregisterNativeAdFactory(flutterEngine, "listTile")
    }
}

然后你在这里的flutter代码上使用factoryId

listTile

    adUnitId: AdHelper.nativeAdUnitId,
    factoryId: 'listTile',
    request: AdRequest(),
    listener: NativeAdListener(
      onAdLoaded: (ad) {
        setState(() {
          _ad = ad as NativeAd;
        });
      },
      onAdFailedToLoad: (ad, error) {
        // Releases an ad resource when it fails to load
        ad.dispose();
        print('Ad load failed (code=${error.code} message=${error.message})');       },
    ),
  );

  _ad.load();

因此请确保在您的

adFactoryExample

文件上注册了factoryId

MainActivity

，并创建一个继承

GoogleMobileAdsPlugin.NativeAdFactory

的类

希望对大家有帮助。

Answer 2

您没有完成原生广告伙伴的所有设置部分。您还需要在JAVA中进行一些设置。

根据文档：

平台设置
原生广告通过平台原生的 UI 组件呈现给用户。 （例如 Android 上的视图或 iOS 上的 UIView）。由于原生广告需要原生的 UI 组件 平台，此功能需要针对 Android 和 iOS 进行额外设置。

您可以在插件文档本身中找到所有内容https://pub.dev/packages/google_mobile_ads