Question

我尝试重新加载受奖励的视频广告，当我致电RewardedVideoAd.instance.load(adUnitId: "xxx", targetingInfo: xyz);时，发现以下错误：

W / MessageQueue（13672）：处理程序（android.os.Handler）{1a13e8a}在死线程上向处理程序发送消息 W / MessageQueue（13672）：java.lang.IllegalStateException：处理程序（android.os.Handler）{1a13e8a}在死线程上向处理程序发送消息 W / MessageQueue（13672）：位于android.os.MessageQueue.enqueueMessage（MessageQueue.java:543） W / MessageQueue（13672）：位于android.os.Handler.enqueueMessage（Handler.java:643） W / MessageQueue（13672）：位于android.os.Handler.sendMessageAtTime（Handler.java:612） W / MessageQueue（13672）：位于android.os.Handler.sendMessageDelayed（Handler.java:582） W / MessageQueue（13672）：位于android.os.Handler.sendEmptyMessageDelayed（Handler.java:546） W / MessageQueue（13672）：位于android.os.Handler.sendEmptyMessage（Handler.java:531） W / MessageQueue（13672）：位于com.google.android.gms.ads.exoplayer1.h.c（：com.google.android.gms.policy_ads_fdr_dynamite @ 20300003 @ 20300003.251657827.251657827：2） W / MessageQueue（13672）：位于com.google.android.gms.ads.internal.video.exoplayer1.f.b（：com.google.android.gms.policy_ads_fdr_dynamite @ 20300003 @ 20300003.251657827.251657827：1） W / MessageQueue（13672）：位于com.google.android.gms.ads.internal.webview.t.E（：com.google.android.gms.policy_ads_fdr_dynamite @ 20300003 @ 20300003.251657827.251657827：5） W / MessageQueue（13672）：位于com.google.android.gms.ads.internal.webview.j.onPageFinished（：com.google.android.gms.policy_ads_fdr_dynamite @ 20300003 @ 20300003.251657827.251657827：2） W / MessageQueue（13672）：在uU.d（PG：307） W / MessageQueue（13672）：位于aIV.handleMessage（PG：73） W / MessageQueue（13672）：位于android.os.Handler.dispatchMessage（Handler.java:102） W / MessageQueue（13672）：位于android.os.Looper.loop（Looper.java:154） W / MessageQueue（13672）：位于android.app.ActivityThread.main（ActivityThread.java:6780） W / MessageQueue（13672）：在java.lang.reflect.Method.invoke（本机方法） W / MessageQueue（13672）：位于com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1496） W / MessageQueue（13672）：位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1386） W / ExoPlayerImplInternal（13672）：发布后发送消息（1）。消息被忽略。 D /图形（13672）：removeVertex（）：insertDummyVertex，因为没有祖先。 D / ViewRootImpl @ b8db50eAdActivity：mHardwareRenderer.destroy（）＃4 D / ViewRootImpl @ b8db50eAdActivity：dispatchDetachedFromWindow

我将侦听器放置在屏幕的initState()中。在此屏幕中，我有一个button，如果我们点击它，它应该显示 Rewarded Video Ads。

此外，在重新加载Rewarded Ads时出错后，点击按钮显示广告后我遇到了错误提示（因为广告实例为 null ）：

E / flutter（13672）：[错误：flutter / lib / ui / ui_dart_state.cc（148）]未处理的异常：PlatformException（ad_not_loaded，对于奖励视频显示失败，未加载广告，null）< / strong> E / flutter（13672）：＃0 StandardMethodCodec.decodeEnvelope（package：flutter / src / services / message_codecs.dart：564：7） E / flutter（13672）：＃1 MethodChannel.invokeMethod（软件包：flutter / src / services / platform_channel.dart：316：33） E /颤振（13672）： E / flutter（13672）：＃2 _invokeBooleanMethod（软件包：firebase_admob / firebase_admob.dart：518：61） E /颤振（13672）： E / flutter（13672）：＃3 RewardedVideoAd.show（package：firebase_admob / firebase_admob.dart：392：12）

我将Rewarded Video Ads Listener放在initState()，下面是代码：

@override void initState() { super.initState(); ... RewardedVideoAd.instance.listener = (RewardedVideoAdEvent event, {String rewardType, int rewardAmount}) { if (event == RewardedVideoAdEvent.completed) { setState(() { print ("::debug:: ads should be reloaded"); RewardedVideoAd.instance.load(adUnitId: "ca-app-pub-3940256099942544/5224354917", targetingInfo: targetingInfos); }); } }; ...

但是，如果我将代码放置在按钮的onPressed上，如下所示，视频广告将在点击2-3次后显示（在调试时显示ads = null）

RaisedButton( onPressed: () { RewardedVideoAd.instance.show().whenComplete(() { RewardedVideoAd.instance.load(adUnitId: "ca-app-pub-3940256099942544/5224354917", targetingInfo: targetingInfos); }) }, ...

有什么想法吗？

预先感谢...

Answer 1

不需要调用set状态，因为它很昂贵并且会导致完全重建。

可以通过以下方式轻松解决此问题：

import 'package:flutter/material.dart';
import 'package:firebase_admob/firebase_admob.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: HomePage());
  }
}

class HomePage extends StatefulWidget {
  HomePage({Key key}) : super(key: key);

  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  //The targeting info required for Rewarded Videos Ads
  MobileAdTargetingInfo targetingInfo = MobileAdTargetingInfo(
    keywords: <String>['flutterio', 'beautiful apps'],
    contentUrl: 'https://flutter.io',
    childDirected: false,
    testDevices: <String>[], // Android emulators are considered test devices
  );

  //An instance to be called in the init state
  RewardedVideoAd _videoAd = RewardedVideoAd.instance;

  @override
  void initState() {
    //---------------------------------------//
    //Initialise the listener with the values.
    _videoAd.listener =
        (RewardedVideoAdEvent event, {String rewardType, int rewardAmount}) {
      if (event == RewardedVideoAdEvent.completed) {
        //When the video ad gets completed load a new video ad
        _videoAd
            .load(
                adUnitId: RewardedVideoAd.testAdUnitId,
                targetingInfo: targetingInfo)
            .catchError((e) => print('Error in loading.'));
      }

      //On every other event change pass the values to the _handleEvent Method.
      _handleEvent(event, rewardType, 'Reward', rewardAmount);
    };
    //------------------------------------------------------------------//

    //This will load the video when the widget is built for the first time.
    _videoAd
        .load(
            adUnitId: RewardedVideoAd.testAdUnitId,
            targetingInfo: targetingInfo)
        .catchError((e) => print('Error in loading.'));

    //-----------------------------------------------------//
    super.initState();
  }

  //---- Useful function to know exactly what is being done ----//
  void _handleEvent(RewardedVideoAdEvent event, String rewardType,
      String adType, int rewardAmount) {
    switch (event) {
      case RewardedVideoAdEvent.loaded:
        _showSnackBar('New Admob $adType Ad loaded!', 1500);
        break;
      case RewardedVideoAdEvent.opened:
        _showSnackBar('Admob $adType Ad opened!', 1500);
        break;
      //
      //The way we are fixing the issue is here.
      //This is by calling the video to be loaded when the other rewarded video is closed.
      case RewardedVideoAdEvent.closed:
        _showSnackBar('Admob $adType Ad closed!', 1500);
        _videoAd
            .load(
                adUnitId: RewardedVideoAd.testAdUnitId,
                targetingInfo: targetingInfo)
            .catchError((e) => print('Error in loading.'));
        break;
      case RewardedVideoAdEvent.failedToLoad:
        _showSnackBar('Admob $adType failed to load.', 1500);
        break;
      case RewardedVideoAdEvent.rewarded:
        _showSnackBar('Rewarded $rewardAmount', 3000);
        break;
      default:
    }
  }

  //Snackbar shown with ad status
  void _showSnackBar(String content, int duration) {
    Scaffold.of(context).showSnackBar(SnackBar(
      content: Text(content),
      duration: Duration(milliseconds: duration),
    ));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: FlatButton(
          child: Text('Play AD'),
          onPressed: () {
            _videoAd.show().catchError(
                (e) => print("error in showing ad: ${e.toString()}"));
          },
        ),
      ),
    );
  }
}

Answer 2

似乎问题出在事件completed上。查看此代码。

MobileAdTargetingInfo targetingInfo = MobileAdTargetingInfo(
  keywords: <String>['flutterio', 'beautiful apps'],
  contentUrl: 'https://flutter.io',
  childDirected: false,
  testDevices: <String>[], // Android emulators are considered test devices
);
bool _loaded = false;

@override
void initState() {
  super.initState();

  // load ad in the beginning
  RewardedVideoAd.instance
      .load(adUnitId: RewardedVideoAd.testAdUnitId, targetingInfo: targetingInfo)
      .catchError((e) => print("error in loading 1st time"))
      .then((v) => setState(() => _loaded = v));

  // ad listener
  RewardedVideoAd.instance.listener = (RewardedVideoAdEvent event, {String rewardType, int rewardAmount}) {
    if (event == RewardedVideoAdEvent.closed) {
      RewardedVideoAd.instance
          .load(adUnitId: RewardedVideoAd.testAdUnitId, targetingInfo: targetingInfo)
          .catchError((e) => print("error in loading again"))
          .then((v) => setState(() => _loaded = v));
    }
  };
}


@override
Widget build(BuildContext context) {
  return Scaffold(
    body: Center(
      child: Text(
        "Loaded = ${_loaded}",
        style: TextStyle(fontSize: 32, fontWeight: FontWeight.bold),
      ),
    ),
    floatingActionButton: FloatingActionButton(
      // show ad on FAB click
      onPressed: () async {
        await RewardedVideoAd.instance.show().catchError((e) => print("error in showing ad: ${e.toString()}"));
        setState(() => _loaded = false);
      },
    ),
  );
}

Answer 3

您好，我认为最好的解决方案是使用try catch，如果有问题，我们可以尝试再次显示。这是我的代码；

MobileAdTargetingInfo targetingInfo = MobileAdTargetingInfo(
  keywords: <String>['flutterio', 'beautiful apps'],
  contentUrl: 'https://flutter.io',
  childDirected: false,
  testDevices: <String>[],
);

String adUnit = "ca-app-pub-6288831324909345/9733176442";
bool tryAgain = false;

await RewardedVideoAd.instance
    .load(adUnitId: adUnit, targetingInfo: targetingInfo);

try {
  await RewardedVideoAd.instance.show();
} on PlatformException catch (e) {
  tryAgain = true;
  print(e.message);
}

RewardedVideoAd.instance.listener =
    (RewardedVideoAdEvent event, {String rewardType, int rewardAmount}) {
  switch (event) {
    case RewardedVideoAdEvent.rewarded:
      setState(() {
        // Here, apps should update state to reflect the reward.
        print("_goldCoins += rewardAmount");
      });
      break;

    case RewardedVideoAdEvent.loaded:
      if (tryAgain) RewardedVideoAd.instance.show();
      break;

    default:
      print(event.toString());
      break;
  }
};

Answer 4

您可以简单地捕获异常，如下所示：

myRewardVideoAd.show()
.catchError((e) => print("error in showing ad: ${e.toString()}"));

Answer 5

请检查您是否在您的 admob 帐户中添加了付款信息。在不向 Google 提供这些信息的情况下禁止查看广告。 Admob Payments

另一个问题可能是您的帐户尚未获得批准。这意味着您的帐户是新帐户，您必须等待 24 小时，最多 2 周。

扑朔迷离-重新加载时出现奖励视频广告错误：“ ad_not_loaded，对于奖励视频显示失败，未加载任何广告，为null）”

5 个答案: