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我有颤振项目，我在屏幕上添加了一个横幅广告，但我需要在同一个屏幕上加载更多，我尝试在不同的地方重复调用该函数

    ======== Exception caught by widgets library =======================================================
The following assertion was thrown building AdWidget(dirty, state: _AdWidgetState#72c34):
This AdWidget is already in the Widget tree


If you placed this AdWidget in a list, make sure you create a new instance in the builder function with a unique ad object.
Make sure you are not using the same ad object in more than one AdWidget.

我可以在同一个屏幕上加载多个横幅吗？

这是 Github 上的链接 https://github.com/Hussamedeen/MyDealApp

HomeScreen.dart

4

2 回答 2

1

由于您没有提供任何代码，我会根据我认为您可以做到的方式来假设和回答。

如果您在预定义的固定位置展示广告，则需要BannerAd为每个位置创建一个新位置。您还必须BannerAd像这样单独加载这些：

final BannerAd myBanner1 = BannerAd(
  adUnitId: '<Banner ID>',
  size: AdSize.smartBanner,
  request: AdRequest(),
  listener: AdListener(onAdClosed: (ad) => ad.dispose()),
);
myBanner1.load();
final adWidget1 = AdWidget(ad: myBanner1);
...
...
...
final BannerAd myBannerNth = BannerAd(
  adUnitId: '<Banner ID>',
  size: AdSize.banner,
  request: AdRequest(),
  listener: AdListener(onAdClosed: (ad) => ad.dispose()),
);
myBannerNth.load();
final adWidgetNth = AdWidget(ad: myBannerNth);

其中myBannerNth/adWidgetNth是第 n 个横幅/广告小部件。

对于动态的、自动生成的情况，例如在 a 中ListView.separated，您可以这样做：

// Defined somewhere, e.g. in your State[less/ful] widget
Map<String, BannerAd> ads = <String, BannerAd>{}; 
...
...
...

ListView.separated(
  separatorBuilder: (context, index) => Divider(),
  shrinkWrap: true,
  itemBuilder: (BuildContext context, int index) {
    ads['myBanner$index'] = BannerAd(
      adUnitId: '<Banner ID>',
      size: AdSize.banner,
      request: AdRequest(),
      listener: AdListener(onAdClosed: (ad) => ad.dispose()));
    ads['myBanner$index'].load();

    if (index % 6 == 0) {
      return Column(
        children: [
          Container(
            child: AdWidget(ad: ads['myBanner$index']),
            height: 100.0,
          ),
         _buildItem(context, items[index])
       ],
     );
   }
   return _buildItem(context, items[index]);
  },
  itemCount: items.length,
)

ads其值是Map单个动态自动生成的横幅广告在哪里。

于 2021-03-17T08:16:21.700 回答
0

资源：

https://github.com/googleads/googleads-mobile-flutter/issues/36

还有其他方法可以做到这一点，例如在包的示例文件夹中创建另一个有状态类。

static Future getBannerWidget({@required BuildContext context, AdSize adSize, }) async{

BannerAd bannerAd = BannerAd(
  adUnitId: getBannerAdUnitId(),
  size: adSize ?? AdSize.smartBanner,
  request: _adRequest,
  listener: AdListener(
    // Called when an ad is successfully received.
    onAdLoaded: (Ad ad) {

      if(_debug){
        print('Ad loaded.');
      }

    },
    // Called when an ad request failed.
    onAdFailedToLoad: (Ad ad, LoadAdError error) {

      if(_debug){
        print('Ad failed to load: $error');
        //_bannerAd.dispose();
      }

    },
    // Called when an ad opens an overlay that covers the screen.
    onAdOpened: (Ad ad) {

      if(_debug){
        print('Ad opened.');
      }

    },
    // Called when an ad removes an overlay that covers the screen.
    onAdClosed: (Ad ad) {

      if(_debug){
        print('Ad closed.');
      }

    },
    // Called when an ad is in the process of leaving the application.
    onApplicationExit: (Ad ad) {

      if(_debug){
        print('Left application.');
      }

    },
  ),
);

await bannerAd.load();

return Container(
    child: AdWidget(ad: bannerAd),
    constraints: BoxConstraints(
      maxHeight: 90,
      maxWidth: MediaQuery.of(context).size.width,
      minHeight: 32,
      minWidth: MediaQuery.of(context).size.width,
    ),
);

}

在画面中：

   FutureBuilder<Widget>(
            future: Ads.getBannerWidget(
                context: context,
                adSize: AdSize.leaderboard
            ),
            builder: (_, snapshot){

              if(!snapshot.hasData){

                return Text("Loading Ad...");

              } else {

                return Container(
                  height: 90,
                  width: MediaQuery.of(context).size.width,
                  child: snapshot.data,
                );

              }

            },
          ),
于 2021-07-22T00:28:35.260 回答